What should an acceptable Compression be for a 850 Turbo?

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#21

08-04-2009, 10:53 PM

matt14

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I was close.

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#22

08-05-2009, 09:30 AM

gilber33

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So if my compression test comes with low numbers, which could mean possibly bad piston rings, could that be the cause of my continuing blow by, even after doing the PCV/PTC system??

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#23

08-20-2009, 12:40 AM

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I just bought a 1995 850 T-5R and the first thing I did was take a compression test.

Results:
180 all cylinders.

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#24

08-20-2009, 08:21 AM

gilber33

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Nice, was that a dry compression test? how about some pictures of it?

Last edited by gilber33; 08-20-2009 at 08:31 AM.

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#25

08-20-2009, 09:08 AM

fcpgroton

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My compression on my 850 T5 with 192K miles is 150,150,150,145,145. I believe the 145 were because the battery started to get tired near the end of the test.

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#26

08-20-2009, 12:17 PM

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Quote:

Originally Posted by gilber33

Nice, was that a dry compression test? how about some pictures of it?

It was after running the motor but nothing added (oil) before the test.

The car was sitting at a home for three years, its beautiful. Fired right up.

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What should an acceptable Compression be for a 850 Turbo?-t-5r.jpg

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#27

08-20-2009, 12:29 PM

gilber33

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nice, good find. One thing I can say I dislike about the Midwest is the lack of cars here, all of the R's are either on the east or west coast, kinda sucks. But I think I may have found a project, more on that tonight.

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#28

08-20-2009, 01:00 PM

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Quote:

Originally Posted by gilber33

I am just taking the motor and tranny out of it. I dont want the car.

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#29

08-20-2009, 02:29 PM

gilber33

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WHAT?! No way. There is so much that I would take from that car including the shell!

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#30

08-20-2009, 10:50 PM

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But you live in WI.

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#31

08-21-2009, 08:31 AM

gilber33

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I KNOW!

don't remind me. I can't wait to live on the East coast where the other half the R's are, since the west coast has the first half.

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#32

08-21-2009, 09:40 AM

Carrots

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Quote:

Originally Posted by silkhope

I have a 94 850 turbo, with what I hope is a burnt valve. It has over 300,000 mi on it, and my compression test result was as follows.

1. 160
2. 160
3. 160
4. 0
5. 150

I hope this helps give you an idea on the range, I think I saw on Vadis it was in the 160 - 180 range? don't remember though.

Heh... that's almost identical to my customer's engine (see cylinder head thread) number 4 has nothing, the other 4 are fine.

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