S52 compression

[Naplm00]

I am looking into a s52 for a swap

the one i found seller says that the compression is 230 psi +/- 5 psi cross al cyl


this seems high to me...but i dont know what the numbers should be

can someone enlighten me?

[MIKe30]

it's more about the % difference between the cylinders, not the actual number. Every gauge reads a little different apparently.

[Van Westervelt]

Claiming 5% variance on all cyl is one thing. Its usually best to have a picture with the gauge in each cylinder showing the pressure.

[Naplm00]

yea, agreed the number seem high tho for a stock engine

[e30s52]

You should put a leak down tester on it. You dont want to chance anything.

[Naplm00]

yea, i though leakdown was done when the engine is warm

does anyone know the correct compression # for an s52?

[e30s52]

mine was in the 210's with less then 3% on each cylinder.

Leakdown can be done when the engine is cold or warm.

[Naplm00]

ok thanks for the info

[nmlss2006]

That is MASSIVELY high and probably an indication of a cold engine with a lot of oil squirted into the cylinders. I would not take those numbers as proof of anything.