Technical Compression numbers for 280a1000 engine.

[Ortensio]

Hello

Does anyone know what are acceptable numbers in bar or psi in compression test for the engine fiat 1.9td 280a1000?

Compression ratio is 19:1


Thank you

 

[bugsymike]

Hello

Does anyone know what are acceptable numbers in bar or psi in compression test for the engine fiat 1.9td 280a1000?

Compression ratio is 19:1


Thank you

I would expect a good engine to be above 350psi. Ideally nearer to 400psi in general. I did look in my manuals but the don't list for "newer stuff" in the old days 400psi seemed to be expected.
Turbo engines can be lower due to the increase in pressure when boost kicks in, however I feel if too low it makes harder cold starting.
Not sure if this theory works , but 19x atmospheric pressure, say 14.75= 280.25psi. No doubt someone will correct me.

 

[Ortensio]

Thx.

My engine is quite old. My numbers are 265. 270. 300 280

The engine coldstarts are fine. The only issue is that after head replacement the engine overheats a bit only in 5th gear and cruising at mid boost (7 psi)

Regards.

 

[bugsymike]

Thx.

My engine is quite old. My numbers are 265. 270. 300 280

The engine coldstarts are fine. The only issue is that after head replacement the engine overheats a bit only in 5th gear and cruising at mid boost (7 psi)

Regards.

Any chance the radiator core is old and the tubes are partially blocked internally. I have had this on vehicles.
It may be possible to feel by hand or with a laser temp gauge.
I have not had this but have heard of water pump impellers broken, though more on plastic impellers.

 

[Ortensio]

Radiator , water pump and thermostat are brand new. The only change in the head has been the place to plug water temp sensor. The original head had the hole in a different place.