What should an S2 ERST compression test psi reading be, if the engine has just been rebuilt with new rings and bearings etc etc

 

often not that brilliant if its fresh. It needs to be run to allow the rings to bed in.

 

Its been run for about an hour or so but I'm trying to find out if the block is cracked, Was going to start with a compression test first but need some sort of figures to work with

 

My engine when re-built after covering less than 100 miles was producing about 170-180 psi per cylinder.

 

u need a leak down test.

 

This might sound a bit dumb rick, but what does a leak down test involve???

 

I think thats compressing the cylinders with an air line and then if u hear leaks u can listen where the air is escaping and that gives you a very big clue as to whats not holding pressure

 

heya m8 on a cylinder leakage test or leak down test witch eva u prefer to call it u should have a compressed air line and a gauge that u can plug the airline in 1 side and a air line cuming out of the other and it will have 100% and 0% readings on the gauge. take all the spark plugs out of the engine and put the car in a low gear. 4th is what i usaly use, u should have a adapter that fits in the sparkplug hole witch u can plug the airline on to and it will fill the cylinder with compresed air and u should get a readng. also on the cylinder u are testing u need to set it up as if it was about to spark (fireing number). once the cylinder has a reading if its not 100% u have a leak just take the dipstik out and check for air leaks (compreshon rings no sealing ) and round the exhaust back box for the nois of compresed air. if u dont have the equipment got to your local garage m8 they should have everything thear to do it

 

No engine is 100% effecient.....

 

did 1 on mine and got 100% on every cylinder if its just bean rebiult it should be m8