Volvo RWD 120-130 Forum

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B18 compression test 120-130

Hi everybody:

I finally got to test the cylinder compression after buying my Amazon almost 3 years ago. It is a B18B and the results were:

#1: almost 180 psi
#2: about the same as #1
#3: around 140 psi
#4: about the same as #3

Strange...the first two cylinders showing 180 psi while the last two are around 140?! I added some oil to #3 and the psi was still the same...I didn't bother to add oil to #4 because I'm pretty the result would be the same.

So it seems that the valves are in need of work...are there any other way to confirm other than the oil addition method? I've found some rebuilt B20 heads for sale...they won't work on original-bore B18, correct? The engine in mine is original and never opened.

By the way, all of the spark plugs look pretty good...light rust-colored...not black or oily.

Any advice? Thanks!







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New B18 compression test [120-130]
posted by  DBS  on Sat Sep 15 17:53 CST 2012 >


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