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#67934 - 01/12/10 08:45 PM Re: Compression test finally
ordonez1307 Offline
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Registered: 04/18/05
Posts: 8901
Loc: Bradenton, FL
If it overheated and shut down I'm willing to bet that the head/heads is/are warped.
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#67935 - 01/12/10 09:44 PM Re: Compression test finally
HercMan(Rob) Offline
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Registered: 09/12/03
Posts: 14035
Loc: Fort Worth, Texas
Car overheated and shut down? Pull the heads and have them checked for cracks and put new valves in.

Do the wet check anyways to confirm it's just the heads and not the rings.

This way you'll know how much your going to have to tear the motor down. Hopefully it's just a head rebuild.
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#67936 - 01/13/10 08:13 AM Re: Compression test finally
grandprix38 Offline
Member
Registered: 03/06/09
Posts: 133
Loc: Seattle Wa
Yea the car just died on freeway, after it lost power,wouldn't go any more then 50mph, it was a stretch on freeway where you couldn't pull over, car started right back up, but when I tried to add water the water came out the bottom of radiater, so had it towed home, next morning water went right in, didn't come out at all, but anyways thanks guys I will check the rings and go from there.

Quote:
Originally posted by ordonez1307:
If it overheated and shut down I'm willing to bet that the head/heads is/are warped.
I hope a low reading in one cylinder wipes that thought out,
but it looks more and more like no matter what prob is the head/heads got to come off.
looks like time to tow it brothers and tear it apart, after wet compression that is.
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#67937 - 01/13/10 02:16 PM Re: Compression test finally
grandprix38 Offline
Member
Registered: 03/06/09
Posts: 133
Loc: Seattle Wa
Quote:
Originally posted by grandprix38:
Yea the car just died on freeway, after it lost power,wouldn't go any more then 50mph, it was a stretch on freeway where you couldn't pull over, car started right back up, but when I tried to add water the water came out the bottom of radiater, so had it towed home, next morning water went right in, didn't come out at all, but anyways thanks guys I will check the rings and go from there.

Quote:
Originally posted by ordonez1307:
[b] If it overheated and shut down I'm willing to bet that the head/heads is/are warped.
I hope a low reading in one cylinder wipes that thought out,
but it looks more and more like no matter what prob is the head/heads got to come off.
looks like time to tow it brothers and tear it apart, after wet compression that is. [/b]
Well did the wet test, and cylinder #3 was 90 psi this time, 10 psi more then dry test, I hope I just read dry test wrong but is that ok to be 10 psi more or is that a sign of rings wearing also?And D3nm it there was some kind of forien material on end of compresion adapter hope it wasn't steel particles.
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#67938 - 01/13/10 04:47 PM Re: Compression test finally
ordonez1307 Offline
Member
Registered: 04/18/05
Posts: 8901
Loc: Bradenton, FL
You're gonna have to pull the heads, man. Hate to say it, but without pulling the heads, it's hard to tell what's going on.

While the heads are off, take them to a machine shop and have them decked and do a valve job.
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#67939 - 01/13/10 05:16 PM Re: Compression test finally
grandprix38 Offline
Member
Registered: 03/06/09
Posts: 133
Loc: Seattle Wa
Quote:
Originally posted by ordonez1307:


While the heads are off, take them to a machine shop and have them decked and do a valve job.
What's the price range on that, sorry my phone is on the fritz till tomorrow.
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#67940 - 01/13/10 05:32 PM Re: Compression test finally
ordonez1307 Offline
Member
Registered: 04/18/05
Posts: 8901
Loc: Bradenton, FL
Quote:
Originally posted by grandprix38:
Quote:
Originally posted by ordonez1307:
[b]

While the heads are off, take them to a machine shop and have them decked and do a valve job.
What's the price range on that, sorry my phone is on the fritz till tomorrow. [/b]
My place around here costs about 60 a head to hot tank and deck them and I think it was like $150 to do valve jobs on both heads when I had them off last.
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#67941 - 01/13/10 05:40 PM Re: Compression test finally
Chico Offline
Member
Registered: 02/08/04
Posts: 3463
Loc: Gonzales Tx.
Well I would suspect a cracked and or warped head,it is not a good idea to do one head though since U will have 2 have the damaged head surfaced this will cause a raise in compression on that bank ,so pull the head first to confirm damage and when U have the head off fill the bad c-lender with a good cup of oil it should take at least overnight for the oil to leak down ,also inspect the c-lender walls to see if it has damage .Chico(pops)
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#67942 - 01/13/10 05:52 PM Re: Compression test finally
grandprix38 Offline
Member
Registered: 03/06/09
Posts: 133
Loc: Seattle Wa
Quote:
Originally posted by grandprix38:
Quote:
Originally posted by ordonez1307:
[b]

While the heads are off, take them to a machine shop and have them decked and do a valve job.
What's the price range on that, sorry my phone is on the fritz till tomorrow. [/b]
$289.00 for the pair aluminum heads and $250.00 for a pair cast iron heads, for valve job and heads decked, Seem like a fair price?
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#67943 - 01/13/10 05:56 PM Re: Compression test finally
grandprix38 Offline
Member
Registered: 03/06/09
Posts: 133
Loc: Seattle Wa
Quote:
Originally posted by ordonez1307:
Quote:
Originally posted by grandprix38:
[b]
Quote:
Originally posted by ordonez1307:
[b]

While the heads are off, take them to a machine shop and have them decked and do a valve job.
What's the price range on that, sorry my phone is on the fritz till tomorrow. [/b]
My place around here costs about 60 a head to hot tank and deck them and I think it was like $150 to do valve jobs on both heads when I had them off last. [/b]
Shiat I better call around then see if I can get job done cheaper then 289.00 for both heads.Assuming and hoping the one isn't cracked or warped
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#67944 - 01/13/10 07:15 PM Re: Compression test finally
Zalfrin Offline
Member
Registered: 04/08/08
Posts: 2647
Loc: Iowa City, IA
Not a huge difference, $270 for corey's 2 heads. Stock GP heads are aluminum?
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#67945 - 01/13/10 07:24 PM Re: Compression test finally
grandprix38 Offline
Member
Registered: 03/06/09
Posts: 133
Loc: Seattle Wa
Quote:
Originally posted by Zalfrin:
Not a huge difference, $270 for corey's 2 heads. Stock GP heads are aluminum?
The two machine shops I called both said sound's like a valve issue. so hopefully head is ok, but will pop off both and have them resurfaced and do valve jobs. Thanks again gentlemen.
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#67946 - 01/13/10 08:03 PM Re: Compression test finally
grandprix38 Offline
Member
Registered: 03/06/09
Posts: 133
Loc: Seattle Wa
Quote:
Originally posted by grandprix38:
Quote:
Originally posted by Zalfrin:
[b] Not a huge difference, $270 for corey's 2 heads. Stock GP heads are aluminum?
The two machine shops I called both said sound's like a valve issue. so hopefully head is ok, but will pop off both and have them resurfaced and do valve jobs. Thanks again gentlemen. [/b]
And also I put a stethoscope to valve covers and exhaust, intake, didn't hear no ticks, does that mean anything, like would a burnt valve cause any noise I should of heard.
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#67947 - 01/14/10 11:17 AM Re: Compression test finally
Chico Offline
Member
Registered: 02/08/04
Posts: 3463
Loc: Gonzales Tx.
Quote:
Originally posted by Zalfrin:
Not a huge difference, $270 for corey's 2 heads. Stock GP heads are aluminum?
Stock head are cast iron,ZZP has aluminum heads for sale for around $2000.Chico(pops)
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#67948 - 01/14/10 12:32 PM Re: Compression test finally
Zalfrin Offline
Member
Registered: 04/08/08
Posts: 2647
Loc: Iowa City, IA
That's what I was thinking too. Thanks for confirming.
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'99 GTP, L36 bottom, XP cam, Headers, 3.29 gears, FWI, Powrtuner
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