 Ran compresion test, 30psi on 2&4 |
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| Ratt |
 Oct 6 2003, 02:55 PM
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#1
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Member  Group: Members Posts: 85 Joined: 10-September 03 From: Goose Creek, SC Member No.: 1,136  |
So I have had the trouble with my motor lately. I ran a comp test. 1&3 are fine at 120psi 2&4 however only read 30psi. I dont understand how two opposed cyl can be like that. I would under stand 1&2, or 3&4 but 2&4? I guess its time to pull teh heads and see what the hell is going on.
Any Ideas Thanks Andy Rattley |
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| Ratt |
Oct 6 2003, 03:07 PM
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#2
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Member Group: Members Posts: 85 Joined: 10-September 03 From: Goose Creek, SC Member No.: 1,136 |
Added a little oil to 2&4 and tried again. this time they came up to about 75psi. so I guess it is rings, and valves then? right?
Andy |
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| TheCabinetmaker |
Oct 6 2003, 03:10 PM
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#3
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I drive my car everyday Group: Members Posts: 8,304 Joined: 8-May 03 From: Tulsa, Ok. Member No.: 666 |
Don't pull the heads yet! 2 & 4 might indicate a distributor trigger point problem, but an internal problem could still exist. Did you squirt oil in the cylinders and recheck compression?
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| TheCabinetmaker |
Oct 6 2003, 03:11 PM
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#4
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I drive my car everyday Group: Members Posts: 8,304 Joined: 8-May 03 From: Tulsa, Ok. Member No.: 666 |
Rings for sure. Time to pull the motor!
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| ChrisReale |
Oct 6 2003, 03:42 PM
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#5
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Sleazy Group: Members Posts: 2,665 Joined: 20-January 03 From: San Francisco Member No.: 176 |
Did you do a valve adjustment yet?
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| Ratt |
Oct 6 2003, 03:49 PM
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#6
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Member Group: Members Posts: 85 Joined: 10-September 03 From: Goose Creek, SC Member No.: 1,136 |
I just got the car. I havent really done enything. I reset the points gap, at which point all this crap started to happen. I turned the key and I guess the gas in the number one cyl ignited and made a nice loud explosion. So If I do a valve adjustment, what are the tolerances on a 1.7l motor? I dont have a book yet. also how he hell do I tell when Im at TDC for number 1?
Thanks Andy |
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| TheCabinetmaker |
Oct 6 2003, 06:39 PM
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#7
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I drive my car everyday Group: Members Posts: 8,304 Joined: 8-May 03 From: Tulsa, Ok. Member No.: 666 |
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| McMark |
Oct 6 2003, 07:07 PM
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#8
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914 Freak! Group: Retired Admin Posts: 20,179 Joined: 13-March 03 From: Grand Rapids, MI Member No.: 419 Region Association: None |
0.006 all around. 0.008 is huge.
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| ChrisReale |
Oct 6 2003, 08:18 PM
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#9
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Sleazy Group: Members Posts: 2,665 Joined: 20-January 03 From: San Francisco Member No.: 176 |
Its .06 all around for 1.7's, the 2.0 is spec'd at .006 intake, .008 exhaust. Thats by the book....I adjust minte to .005 all around, and it makes for a less noisy and peppier engine
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| Joe Bob |
Oct 6 2003, 09:04 PM
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#10
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Retired admin, banned a few times Group: Members Posts: 17,427 Joined: 24-December 02 From: Boulder CO Member No.: 5 Region Association: None |
Adjust the valves and check spark, run it.....you may have washed the cylinders down with gas....have you checked the oil to see if you have gas in the crankcase??
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| RustyWa |
Oct 6 2003, 10:05 PM
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#11
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Working Member Group: Members Posts: 610 Joined: 2-January 03 From: Kent, WA Member No.: 72 |
Doesn't 2 & 4 share the same cam lobes?
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