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Old 11-15-2021, 01:58 PM   #4
2NDSOUT
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Join Date: Sep 2000
Location: Cincinnati, Ohio
Posts: 7,377
 

1994 SL2
1999 SL
Default Re: specifics on compression testing, P0301

Your compression numbers, are WAY low...

Regardless if you do a wet or dry compression test... your numbers across all 4 cylinders should read at least 185 or better.

The standard PSI rating across all 3 cylinders for the majority of the S-Series run; was 185 on each cylinder.

As you may know- these engines were known for oil burning... and the only way to really do *Some* kind of fix for oil burning, is to drill small holes in the pistons to allow for some kind of oil draining.

I think you may be chasing your tail on this one; as much as I hate to say that... nothing that you are going to do outside of the engine, is going to bring those compression numbers to a decent working number.
...
Bryan

94SL2 HCE, "Pearl"

99 SL

94SL2 260K Miles
1/15

97SW2 266K Miles
2/15

Always
94SC1 340,501 Miles
Org. Engine/Auto Trans
2/97-10/08
Gone 3/12

92SL1
05VUE
91SC
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