Rashid123
Member
So I wedge it out but the piston head got stuck way bottom of the bore and now it not going up but it on rotates ,any suggestions, thanks
Technical Hi guys ,while I was taking out the crankshaft from my uno ,one piston got suck at the bottom of the bore because the rod cap was not coming out easy
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Technical Hi guys ,while I was taking out the crankshaft from my uno ,one piston got suck at the bottom of the bore because the rod cap was not coming out easy
The Panda Nut
Nutty about Pandas Infected by Panda virus and OPD
Well you need a piston ring compression tool. You should be able to manipulate it back without. Ive seen it done. If it really wont go you may have a lip on the bottom of the bore or a broken ring stopping it. Whichever its not going to be easy as the compression tool is made to work from above with the cylinder head off. Thats last resort. Taking the head off. Make sure the relevant spark plug is out or you may be fighting compression on the affected cylinder. Good luck. Persevere and take your time.
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Rashid123
Member
Yes there is a lip at the bottom that's why its stuck,and there's a limited space to pull it out which won't work taking it out from the bottom,only way to hit it from the bottom ,will damage the bore eish,any suggestions thnks
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Rashid123
Member
Anyway the head is already out
The Panda Nut
Nutty about Pandas Infected by Panda virus and OPD
Maybe @bugsymike might have a view?
Generally pistons on modern cars are only meant to come out upwards along with the con rod minus the big end cap and often only one side of the crankshaft usually with crank at bottom dead centre for max. clearance.
If you are saying it has gone down so far when working on the big end cap that the piston rings have sprung out , then the only thing I can suggest is using a couple of flat screwdrivers to ease the rings back in as you push the piston back up the bore.
I am trying not to make any rude comments, but it does sound like a little more care required.
Any persuasion I would do with a gentle knock using a piece of wood so as not to damage anything.
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Rashid123
Member
Thanks I managed to knock the piston up the bore with a rubber mallet and a piece of wood ,only damage was the scraper rings ,bore is fine ,no damage,now I need to buy a set of Hastings rings for R430,and bearings,Generally pistons on modern cars are only meant to come out upwards along with the con rod minus the big end cap and often only one side of the crankshaft usually with crank at bottom dead centre for max. clearance.
If you are saying it has gone down so far when working on the big end cap that the piston rings have sprung out , then the only thing I can suggest is using a couple of flat screwdrivers to ease the rings back in as you push the piston back up the bore.
I am trying not to make any rude comments, but it does sound like a little more care required.
Any persuasion I would do with a gentle knock using a piece of wood so as not to damage anything.
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Rashid123
Member
Thank you all for advice ,really
It is always worth using a honing tools to deglaze the cylinder bores when fitting new piston rings as it helps them bed in better and of course checking the correct ring gaps, even though they may say they are pre gapped, I always do that and make sure the gaps are set away from the other ring gaps, that and plenty of oil around all of it and the bearings to help installation and first start up.
