Hello fellow Volvo drivers,

I am on my way to attempt a compression test on my Volvo, a 1991 740T sedan. Now I thought about a dealership test or a test by my self, and I simply wish my own hands upon my Volvo. In any case, with this i am upon the notion of acquiring a screw-in type compression tester, my question lies within the point of what may be set parameters of compression for the B230FT engine. I read on an interesting website that perhaps it was 208psi.( http://www3.telus.net/Volvo_Books/engine3.html ). Appearantly i really need to get the gothenburg bible. Is this correct or should i take into account any wear which most likely is a factor in a variable psi readout which should be to a normal and/or acceptable tolerance? I had a compression test done a while back, however i feel another is most reasonable.

Any comments regarding this will be well recieved. Thanks!

 

131 min - 160 lbs. with and a variation of no more than 29 lbs.

 

That's out of sight.

Are you certain that's what it should be?

 

how many revs per hole? dry or wet? running or static?

 

My book says 0.9 MPA about 148 PSI
Deviation 0.2 MPA about 29 psi