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Re: Just had leak down test done and am not happy: (archive)

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Posted by Matt S on July 18, 2001 at 16:04:26:

In Reply to: Just had leak down test done and am not happy: posted by SilverM3 on July 18, 2001 at 13:47:37:

Having the compression numbers increase after adding oil to the cylinders suggests that the piston rings are going south. Not good news, you're probably in for a rebuild on both eventually. At the mileage indicated, those numbers seem very low. You might want to get a second opinion though, it's possible to do a compression test wrong (i.e. throttle closed, spark plugs still in other cylinders).



here are our numbers. (my and my girlfriends M3's.)
Both our cars have high mileage- but my mechanic told me to try adding some recovery stuff to my oil, and even trying better oil im not totally sure if i want to deal with this...

here are both our numbers:

'96 m3 w/ 98k:

#1: 175 psi
#2: 120 (went up to 160 when added oil to cyl)
#3: 120 (" 150)
#4: 175
#5: 175
#6: 120 (" 160)

'95 M3 w/ 113k:
#1: 120 psi (didnt go up w/ oil)
#2: 150
#3: 150
#4: 100 (150 w/ oil)
#5: 125 (175 w/ oil)
#6: 175

Now, does anyone know if these are bad? Im debating to sell the '95 M, and need advice. Thanks!

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