Right my Fiat friends, I know i haven't updated the thread in a while but that doesn't mean there hasn't been any progress.
Project is, as always, on a slow burn but things have sped up in recent weeks.
[Also now going to post a description of what i've been doing and then the picture, makes for an easier read i think. Though this is the opposite of what I have done in the past]
Another long post but I'm sure you'll like the read
Gathered all my various different valves I've acquired over the last few years.
Wanted to talk to the machine shop and get their opinion of the different makes, which to use, which to avoid etc.
Back from the machine shop. 3 angle valve cut, skim and pressure tested.
I did ask them to replace the valve stems but they said it really wasnt worth it, unless i just liked to spend money.
Still all wrapped up, hadn't been touched in months.
As i mentioned in an earlier post; the reason i hadn't sealed the sump back on is because when i was installing new bearings, i dropped one down the bottom of the bore and stratched the surface. Another set of bearings were ordered, this was just to replace a single one but as i said, I dont mind having spares.
Can see the scoring on the bearing face in the picture below. Though they may only be faint marks, they could well induce further wear / failure, especially with a crank potentionally spinning over 133 times per second (8k rpm).
Sealed the sump back on using Loctite 5980 and bolts / nuts tightend to 10nm.
Still not sure about the ground clearance with the magnetic sump plug. Though it will be put in the car dry and filled up with fluids before being started. If it's too tall, then i may just stick in the vice and get the grinder on it.
Started to reassemble the head and put the inlet valves back in first.
Using an ebay special valve spring compressor still, find it very easy and does the job fine.
Using FAI exhaust and inlet valves for this. I do also have a set of OEM exhaust valves but decided to use FAI one's in both.
As you can see from the pictures, the inlet valves went in fine.
The double valve springs were installed, with a brand new set of lower retainers. Every spring was once again cleaned in white spirits and then plenty of assembly lube was used on the valves / springs.
Installing the last exhaust valve and I'd been using a 9mm socket to gently tap the oil seals on.
It was all going so well...... then i split a seal. (you can see the top retaining spring is missing and a small split.
After a quick search of the net, i couldnt find anyone that would sell individual seals for a good price. I didn't particularly want to buy another complete set.
I rung up the machine shop (Nuneaton Rebores) and they said to come over and see if any of the spares they have are the right size. They had one and let me have it for free, top blokes
Though the inlet valves all had the same part numbers you can see a slight variation in the heads here. One are slightly larger in diametre but are shallower that the one next to it. Assuming this is so they still have the same volume in the combustion chamber.
Can also see where i started to polish the combustion chambers but i'd had enough of sitting there with my die grinder and I was happy with how far i got.
Head reinstalled back on the block and all torqued to spec.
The inside of this end plate, covering the cam wheels, it was so filthy. This picture is after about two solid hours of trying to clean it out. The amount of oil sludge was something else. Every a brass wire brush on the die grinder was just clogging up the brushes in a matter of seconds.
Tried soaking it in petrol, white spirits, meths, scrubbing with various brushes. In the end i used the small screwdriver to the right and just scraped most of it out.
The cambox was damaged on the initial installation and subsequent removal. I just wanted to give it a quick blow over to neaten it up.
Gave it a rub down with wet dry up to 1200 grit.
Dusting of white primer and back over with 1200.
Applied a layer of colour. In this shot you can see tape marks but I was going to lightly sand this out and blend it back in.
Similar damage to other end of the cambox, this time for the crash, due to the slam pannel hitting the engine.
Same process as the other side, sand up to 1200 grit, primer, sand, primer, sand, colour.
Was happy with the results but thought, i might as well give the entire cambox another coat of colour.
Went a bit more than that though.....
I was happy with the end results but I'd had enough of primer, sand, primer, sand, primer, sand, colour, sand, colour, sand.....
Todger painted it for me for the first time and he did a good job but wasn't quite as thick or as bright as it could have been. I was struggling to take pictures of the painting, it was just too green
It was time to reinstall the camshafts. They'd just been sat on the side for the past year, all wrapped up and just waiting to be reinstalled.
I'm sticking with the original 1242 stilo exhaust camshaft but using a 1368 'Starjet' inlet cam.
I measured the to the 1368 inlet cam it has an additional 0.8mm of lift compared to the stilo inlet cam.
I've plotted out the cam events on a degree wheel below (click it for a very high res image).
The data listed is from the stilo and grande punto elearn software.
I've only plotted the exhaust cam for the stilo, not added the star jet exhaust. I can talk through the reasoning of this is you like but looking at the data i believe this is the best choice.
An extra 0.8mm of lift
The higher lift does mean the duration will be longer, the cam lobes can't be too steep.
An extra 8 degrees of duration. 220 vs. 212.
With the lobe centre being a further 8 degrees before BDC,the higher lift and longer duration allow more air to enter the cylinder.
Dissapointed there wont be any scavenging due to a lack of overlap, no different from standard though.
I know that's just a basic premise of trying to explain some of the benefits and if I'm wrong at all, let me know.
The cambox was rinsed out with meth and white spirits multiple times and given a blow over with the air line each time.
It was the final time i was going to clean it out that i noticed the damage below....
This scoring is above cylinder no. 4, the 7th tappet on the exhaust side.
I can't believe I'd missed this before but it was because I always flipped the cambox over the other side to clean it.
Luckily I still had the tappets bagged up as exhaust / inlet ones. After inspecting each exhaust tappet, i couldn't see any scoring on any of them. No small pieces of grit or anything that have caused the damage in any of the oil holes / galleries.
Looking at the pictures above though, note how the damage is very localised. Surely any foreign material that would of been caught between the tappet and the wall would of left scoring over the entire circumfrace of te clyinder?
How would any material have entered and exited the cylinder and not leave any scoring above or material this single area?
I couldnt justify it to myself that any debris would still be in the cambox.
I'd washed it and cleaned with the airline so many times already. I thought the best thing would be just to reassemble it and hope for the best.
Though this may have explained the slight tapping that the top end suffered from when it was last running, i dont know.
I may just put a mechanics stethoscope to the affected tappet once it's running again.
With nothing i could really do and believe the damage was too localised, i decided to reassmble.
A new set of tappets were going to be installed anyway.
Lots and lots of assembly lube was used here and when installing the cams.
I coated everything i could and i was still unsure how long the engine would be stored for.
Luckily all that assembly lube is very sticky and allowed the tappets to reamin the cambox whilst i placed it on the head.
Torqued the cambox back down and all the caps.
Though im not 100% with the rocker gasket, on the original one that i removed, each of the spark plug holes were seperate from the rest of gasket, yet on this replacement they were all connected and i wasnt sure if i should of cut them out.
What should i do? it's easy enough to take the cambox off and cut it out if i have to
After seeing what happened to Whitz's cambelt at Stanford in 2014, i decided to not buy a cheap one and ordered one from Shop4Parts.
Reinstalled water pump and bottom pulley. This time holding the crank via some bolts and bar on the flywheel holes.
Cams also locked still locked.
Timed up the engine, spun it over twice and rechecked the timing.
Left it for 20 minutes and rechecked the timing, which was slighly out.
Corrected it, spun it over twice and left it again.
Timing was still correct so i set the tensioner.
Close up of the trigger wheel on the crank.
When the crank and flywheel were balanced i also asked them to turn up the broken edge of the pulley and they also balanced this with the bottom end.
The reason for the double ribs on the pulley is due to the engine originally having air con and the trigger teeth for the crank sensor and then on the opposite side of the pulley.
The old spark plugs went back in with the old HT leads.
NGK Iridium plugs and a new set of magnecore leads are going to be put on once the engine is back in the car.
So that was the engine finally back together and sorted (hopefully). Taken over a year but i can say that i did everything on it that i could.
I wasnt happy with the engine mount for alternator, it was squealing and the belt was catching slightly, though this may have been due to the badly spaced alternator.
As I still had the compressor and my die grinder nearby, i shaved off some extra material from the mount to allow slightly more clearance for the alternator. (I even cleaned up the cast lines, i know you'll never see it but i'll know).
Even after removing material from the mount, clearance is still tight but a lot better than it was. The mount was then given a few coats of black hammerite.
The alternator is an older model from a mk1 16v punto and i wasn't too happy with the condition of it and i did have plans to rebuild it. Plus as you can just about see on this picture, the pulley wheel is damaged.
You didn't think that would be all that was in this update did you?
Bear with me, there's still more
Well my car had actually gotten buried with all the crap that had surrounded it and been placed on it whilst i wasnt using the garage. So i spent an afternoon cleaning it all out so i could actually get to the car.
Unplugged and removed the engine loom. Also decided to remove the bonnet to make access easier. Also measured up bonnet bolts and distance between wing bolts for bonnet struts.
A delivery from Poland, though my cat was more interested in the box it came in than the car parts themselves.
Nothing nicer than Magneti Marelli boxes.
Complete set of new coolant hoses and a new expansion tank. The set from Shoebox or Paws are getting on for 15 years old, the rubber is starting to slightly hard and dont want them to perish. Besides if I'm going to all this effort, i best keep the cooling system in top condition.
Brand new upgraded alternator. Should give out 70 amps.
I set about removing all the suspension components, driveshats etc.
Fraid i dont have any pictures here, nothing really to show. Everything is going to be replaced anyway.
New FK coilovers are going on, new ARBS, new ARB brakcets, new bushes etc etc.
The only bit i had real had any trouble with was removing some bolts. Even with lots of plusgas used it was a struggle. My air impact wrench is made of chinesium, much cheap, very good! Wouldn't even touch any of the bolts for the shock to the hub. It did loosen one about two turns after hammering it for a while though. Going to buy myself a decent one in future.
I tried my battery impact gun on it and I have to say I'm very impressed with it, I bought a cheap chinese one off of ebay for about £80 and didn't have much hope for it but it's done everything i've wanted so far. It's nothing compared to a decent air impact gun but for it's price and portability I'll be using it again in the future.
Looking back through this thread, you'll see i removed the N/S hub and replaced it with a non-abs one. The bearing in it was shot and i knew i'd be binning off the ABS system anyway, plus the bearings in the Shoebox were quite new.
Could i remove the O/S hub nut though?
Nothing i had touched it. With the car up in the air, I didn't really want to stick a bar and a scaffold pole on it either, for fear of the car moving around on the stands.
Various punches and chisels were used to break the tabs and most of the outer ring, then stuck the cordless impact on it.
I couldnt break the bottom ball joints on the hubs to wishbones either. Much hammering, plus gassing, levering with a big bar and plenty of swearing were inaffective. In the end I went out and bought a 'forked' ball joint seperator, my scissor one being too wide to fit. Couple of hits with a large hammer and it was all apart.
ARB was removed, as usual, snapping the studs on the lower arm brackets. The mounts for the arb to underneath the car were rather crusty and badly corroding as well. I didnt have a set of spares off of the shoebox and to be fair, they'd pretty much disintigrated anyway.
So i was going to do the tried and tested Edd China method - brush it back to bare metal and paint it a smooth black.
With everything out of the way, I set about removing the engine and gearbox.
I originally wanted to borrow a hoist but i couldnt get one locally, well not without hiring one and refuse to do that for a job that will take less than an hour.
After the last time of using a jack with Todger to remove my last engine i wasn't too happy with using one to remove the engine.
However I'd since acquired a 3 ton industrial jack, went in to the garden and got myself a large piece of wood to balance it on.
Came out easily this time, the real fun was getting it round the back of the house and seperating the gearbox. The trolley that i put it on was rated for 150kg, well that then bent in half and buckled two of the wheels but still managed to drag it round.
The cordless impact gun came out again and buzzed off the bolts.
We coudln't seperate the gearbox though, all the bolts were off and we were pulling at it but just couldn't see where it was catching.
Those little 10mm bolts for the splash shield can't be holding it together can they.....?
When removing a gearbox from these cars, remember to remove splash shield as well, as it's placed around the flywheel and then bolted to the gearbox.
I'm probably going to use the five speed gearbox whilst the engine is on it's break in period, i do have a six speed box sat in the garage waiting to go on though. Just think i'd rather have greater steering lock and wont be reving it much yet. One day in the future i'll swap it out and try the six speed and let you know which i prefer.
Whilst dismantling the engine and gearbox, there seemed to be a lot of white powder or some kind of residue covering the majority of the metal parts. On removing the starterm you can really see the ali corrosion that's seemingly been eating at part of this front end.
Don't know why it has affected this block so badly. I mean it's only light surface corrosion but appears to be everywhere.
It's not my garage enviroment either, as there's still lots of ali components stored in there and they havent rusted at all.
Any ideas?
One piece i will be removing and changing, the standard fuel pipe to the inlet manifold.
I ended up cutting it as i couldn't take it off of the fuel rail. I'm not happy with them and would like a nice braided piece.
I'm going to see a local hose and fittings place and see what they suggest, I might cut the fuel pipe furter down and buy some nice high pressure fittings and run braided from where it enters the engine bay.
Crusty gerabox mount was also removed, along with the ARB brackets and gearbox mount.
Gearbox mount will be painted green (as the old one was).
They were then sanded back with a rotary wire brush and a few brass wire wheels.
The amount of crap that went everywhere was crazy.
Given a few coats of hammerite. Yes there are lots of runs and areas where it's pooled but i really dont care. As these will be under the car, they were literally smothered in hammerite.
Stone guards were removed from the hubs, they'd gotten rather crusty too.
The one on the left is how it came off of the car and on the right after being given the treatment with the wire brush.
Never even knew they had Fiat stamped on them, not that you'll be able to see it again when im done.
Didn't go that thick with the paint but enough to give a nice even coverage.
The hubs were given the same treatment; brushed back and painted black.
Painted several thin layers of paint here and just need a few bits touching up now.
With the paint drying, I set about the one job i wasn't really looking forward to. Starting to strip out all the wiring from conduit and trying to remove the dash.
Sorry about the picture quality, camera appears to struggle to focus inside the car, bad lighting and lots of colours.
All the conduit has been removed from cabling, crusty old cloth tape has also been taken off (that's what is covering the windscreen in one of the interior pictures above).
Firewall removed, dash removed, 'crash bar' (useless thing) has been removed. Brake servo, clutch cable, throttle cable
all gone.
That's where the project is at currently.
I still haven't built any of my megasquirt and it's what i'd like to have done before i tackle the wiring. I could plumb in wiring etc before it's built but that just doesnt seem right to me.
Just need to sit down and get soldering, it's not that hard just dont want to go wrong and have to order more bits from america.
Once it's together it's just a case of rewiring it all.
I just need to sit there and start tracing wires back and labelling everything.
Might do a wire tuck as well, plan where all the cabling will be going and keep it nice and neat.
Comments, questions, queries welcome as always
