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compression test results......not good

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Old Oct 19, 2002 | 09:17 PM
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From: OCONUS
Default compression test results......not good

so today i was messing around with my nitrous set up and i took my car for a test run. car pulled hard....harder than ever. when i came home to check my plugs i found the the number 3 plug was melted. this then led me to a compression test. everything checked out. 170 165 165 170. so tonite i am coming home from a friends and i see i am starting to over heat. im like god damnit! lift the hood and my overflow tank is about to OVERFLOW. i rechecked my compression and i came up with this. 155 150 165 170....number 3 and 4 dropped. so now i am thinkin wat could be wrong? since i was oveer heating i am thinkin head gasket. but since i had a melted plug earlier im thinkin rings or hole in the piston.....or burnt valves.

tomorrow i will do a leak down and see wats up. could you guys think of anything. would it be alright to drive my car around like this until i can pin point the problem. and one more thing when i was doing the compression test i noticed a bubbling noise coming from under the intake manifold.......??? wat do you think?

please help me out.....this is my only ride.
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Old Oct 19, 2002 | 09:49 PM
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Default Re: compression test results......not good (dirtySOHC's)

minor piston damage + blown headgasket.

So what nitrous setup and tune where you running?


[Modified by Mista Bone, 1:49 AM 10/20/2002]
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Old Oct 19, 2002 | 10:23 PM
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From: OCONUS
Default Re: compression test results......not good (Mista Bone)

NOS wet jetted at 50. i think the bottle pressure was too high.....i dont have a guage so i couldnt tell......


if i had minor damage to the pistons would this be safe for me to drive for a while......you think maybe i can replace the gasket and just run with it for a while.....
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Old Oct 19, 2002 | 10:55 PM
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Default Re: compression test results......not good (dirtySOHC's)

search "Redneck Rebuild" then reask the question.

Noitce I said MINOR piston damage.
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Old Oct 20, 2002 | 04:32 AM
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From: OCONUS
Default Re: compression test results......not good (Mista Bone)

bump
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Old Oct 20, 2002 | 05:53 AM
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From: OCONUS
Default Re: compression test results......not good (dirtySOHC's)

so i looked it up but i am not quite following. are you saying cuz after the rebuild your #3 cylinder comp was 165 and by that you are saying i can just change out my gasket and run fine?
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Old Oct 20, 2002 | 07:01 AM
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Default Re: compression test results......not good (dirtySOHC's)

tomorrow i will do a leak down and see wats up.
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Old Oct 20, 2002 | 09:11 AM
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Default Re: compression test results......not good (Chiovnidca)

last night i ran a few more comp tests just to make sure. i read 160 160 160 165. they are pretty low but minimum comp listed is 134. hopefully the damage is not as bad as i think it is. if its just the head gasket i will be more than happy. i cant do the leak down till i am off of work and even then i dont know if i will have time to do it...

*nate who hates obligations when his car is in need*
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Old Oct 20, 2002 | 03:43 PM
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Default Re: compression test results......not good (dirtySOHC's)

yeah it's prolly just the head gasket...
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Old Oct 20, 2002 | 06:39 PM
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From: OCONUS
Default Re: compression test results......not good (3rdGteg)

here are some pics of my plugs after running the car today. only from work and back......less than 4 miles. they dont too good to me. wat do you guys think....?? sorry they are kinda big..

#1


#2


#3


#4

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Old Oct 20, 2002 | 08:11 PM
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Default Re: compression test results......not good (dirtySOHC's)

Yeah, u looking like you're running real hot up in that combustion chamber; you better ease up on that bottle and take a look at your pistons when you pull your head off to do a head gasket. I'd get that leakdown test done before anything though.
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Old Oct 21, 2002 | 05:53 AM
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Default Re: compression test results......not good (3rdGteg)

that looks like a lean condition, definately get the sucker checked out
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Old Oct 21, 2002 | 07:21 AM
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From: OCONUS
Default Re: compression test results......not good (3rdGteg)

Yeah, u looking like you're running real hot up in that combustion chamber; you better ease up on that bottle and take a look at your pistons when you pull your head off to do a head gasket. I'd get that leakdown test done before anything though.
will do.....i sold my kit the same day this **** happened......im done with nitrous.


[Modified by dirtySOHC's, 4:21 PM 10/21/2002]


[Modified by dirtySOHC's, 2:28 AM 10/23/2002]
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