compression test on m8
08-04-2017, 08:22 PM
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compression test on m8
Had dealer do a compression test and a leak down test on a 2017 m8. Compression was 125 in each cyl and leak down 5%. Is this good?
08-04-2017, 08:43 PM
Join Date: Sep 2007
Location: central MN
Posts: 572
Cranking pressure should be well over 200 psi. Something is not right with those numbers.
08-04-2017, 09:02 PM
Join Date: Nov 2016
Location: Northern New Jersey
Posts: 7,152
Quote:
Had dealer do a compression test and a leak down test on a 2017 m8. Compression was 125 in each cyl and leak down 5%. Is this good?
Why did you request a compression test? Actually surprised you could request that without cause.
08-04-2017, 09:03 PM
Join Date: May 2012
Location: Carlsbad, CA
Posts: 32,368
Quote:
Originally Posted by
stixvrad
Why did you request a compression test? Actually surprised you could request that without cause.
08-04-2017, 09:30 PM
Join Date: Apr 2013
Location: St Louis
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this sounds about as right as a chicken with lips. and everyone knows that makes zero sense.
The following 3 users liked this post by jclax01:
08-04-2017, 09:30 PM
Join Date: Nov 2013
Location: SW Washington State
Posts: 3,807
Quote:
Originally Posted by
thereal142
Cranking pressure should be well over 200 psi. Something is not right with those numbers.
perhaps they failed to disable the CRV
08-05-2017, 12:16 AM
Join Date: Sep 2016
Location: Okmulgee
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On a stock 107 per manual.
08-05-2017, 01:16 PM
Join Date: Sep 2007
Location: central MN
Posts: 572
Quote:
Originally Posted by
psyshack
On a stock 107 per manual.
I'm pretty sure someone on this forum said they were running over 200. I think it was someone like Steve Cole, Jamie Long, or someone else that seemed legit. Also, I would jump the starter to do the test. No spark, fuel, or ACR.
I could be wrong.
Last edited by thereal142; 08-06-2017 at 12:07 AM .
08-05-2017, 03:53 PM
Join Date: Sep 2009
Posts: 2,042
How did you hold the throttle blade open while doing the test?
08-05-2017, 04:10 PM
Join Date: Jul 2014
Location: MASS_hole
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Take note djs asked here what the forum thinks of these results. Wonder why tech didn't offer their opnion? That is what's perplexing here
08-04-2017, 08:43 PM
