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Compression check: good numbers?

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Offline nighthawk801

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Compression check: good numbers?
« on: July 27, 2004, 04:07:51 AM »
Did a compression check on both of my Sidekicks recently and was a little surprised to get 145-150 PSI on all 8 cylinders (a couple were down close to 135 or so).  I figured these were pretty good numbers, especially considering it's not a terribly high compression engine and that they have 180,000 and 250,000 miles  :D

What kind of numbers does everyone else get on the 8V?
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90 Sidekick 2-dr w/ hardtop, 250k mi.
2-3" susp., 1.5" body, 4.4:1 low, ARB rear, onboard air.
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89 Sidekick softtop Stock, 180k mi.
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Offline jerryp58

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Re: Compression check: good numbers?
« Reply #1 on: July 27, 2004, 04:12:29 AM »
My '90 is showing:

#1 -- 170
#2 -- 160
#3 -- 165
#4 --  60      DOH!!!

I just read the number out of my service manual the other day and thought they were supposed to be around 180 and 190 with no more than 11% or 14% difference in any two cylinders.  I can check for the exact numbers later if you'd like (and no one else provides the info).

All in all, I'd say your two are in pretty good shape.

« Last Edit: July 27, 2004, 04:13:00 AM by jerryp58 »
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Jerry
1990 Geo Tracker,  2-Door Hard Top
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Offline 1bigtracker

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Re: Compression check: good numbers?
« Reply #2 on: July 27, 2004, 06:34:10 AM »
Quote
on all 8 cylinders

what year tracker do you have??? ;D

stu
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Offline nighthawk801

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Re: Compression check: good numbers?
« Reply #3 on: July 27, 2004, 08:01:03 AM »
Didn't you know the 88 Sidekick came with a V8?

;D
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90 Sidekick 2-dr w/ hardtop, 250k mi.
2-3" susp., 1.5" body, 4.4:1 low, ARB rear, onboard air.
http://www.clubgm.com/redzuki

89 Sidekick softtop Stock, 180k mi.
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Offline 1bigtracker

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Re: Compression check: good numbers?
« Reply #4 on: July 27, 2004, 09:12:32 AM »
Quote
Didn't you know the 88 Sidekick came with a V8?

;D

;D
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Offline trialspro

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Re: Compression check: good numbers?
« Reply #5 on: July 27, 2004, 12:30:57 PM »
my sami has 135, 145, 145, 150
it has 190000KMs
not sure what that converts to in your weird measurements

Andrew
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Offline Rhinoman

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Re: Compression check: good numbers?
« Reply #6 on: July 28, 2004, 12:18:49 AM »
Quote

what year tracker do you have??? ;D

stu




Quote
... on both of my Sidekicks...

« Last Edit: July 28, 2004, 12:19:12 AM by Rhinoman »
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2000 Vitara 1.6, 3+3 Lift, 33"MTs, 5:83s, LWB brakes, Winch, Snorkel, Safari Rack
1986 SJ413K PickUp, 1.6L conversion.

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Offline 1bigtracker

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Re: Compression check: good numbers?
« Reply #7 on: July 28, 2004, 05:44:57 AM »
dam, i guess i missed that. ;D

stu
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