C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Head Gasket??

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Old Feb 9, 2010 | 11:24 AM
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Default Head Gasket??

Ok new guy here and I am mechanically inclined but on a limited budget. have a 89 convert. stock engine (i think) with 195,000 miles. lifters seem to rattle, recently had a overheating problem. changed water pump, thermostate and spark plugs. I noticed the passenger front two plugs had water on them. changed plugs and filled with antifreeze/water mix noticed white smoke when cold then clears up. This is a daily driver and need to just fix temp. until mid summer. Any recommendations? Are there any additives to use to seal up head gasket for about 20,000 miles, thanks to any response.
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Old Feb 9, 2010 | 11:57 AM
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the only additive that really works is a new head gasket. Do a compression test; if the cylinders that you noticed teh water on are lower than the rest, that's where your head gasket is compromised. Once you get the head off, you need to check for cracks in the head/block to be sure that the HG is the culprit...good luck
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Old Feb 9, 2010 | 01:41 PM
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Being on a limited budget, you probably don't want to get into a total rebuild at this point. So here's what I would do,and have done with some sucess. Get a can of the best ceramic block sealer you can find. Not the powderd aluminum crap. Drain all the antifreez out, and I mean all. Remove the valve covers( that's not alot of fun either) but it's not hard. Retorque your head bolts. I have skipped this part and still had some luck, but only with iron heads.Fill with clean water only and the sealer.Follow their directions. I've done this before and it has bought quite alot of time before I had to tear into them. One toyota 4cyl I owned ran for almost a year with this method, even passed Ca. smog!
Hope this helps,good luck to you.
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Old Feb 9, 2010 | 04:12 PM
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New head gasket is the permanent fix. I would try that sealant the auto chains sell. Goodluck.
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Old Feb 9, 2010 | 04:19 PM
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My view: You're asking for more extensive trouble. Coolant in the oil will kill your bearings and greater carnage will soon follow.

Gotta bite the bullet on this one. New HG time.

Jake
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Old Feb 9, 2010 | 04:34 PM
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I have no water in the oil or the coolant. So what does this mean?
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Old Feb 9, 2010 | 04:57 PM
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New headgasket $40, exhaust $15 and intake $15, so for $70 odd dollars the leak is fixed and about 4-5 hrs work.
Get your headgasket from here -
http://www.cnc-motorsports.com/product.asp?ProdID=20111
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Old Feb 9, 2010 | 06:28 PM
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Originally Posted by lbrehm02
I have no water in the oil or the coolant. So what does this mean?
It means the majority of the coolant is going into the cylinder and being vaporized before it has a chance to get into the oil. Of course there are other ways besides a head gasket that coolant can get in there.But at 195k the best guess would be head gasket. If you wanna take the time, and spend the money for new gaskets,that is the right fix as others have said here. If you just wanna limp by for a few months, maybe longer, try the sealer and keep an eye on her.
By the way, if your not getting too much water in the oil, it must be a pretty small leak.
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Old Feb 9, 2010 | 07:07 PM
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Also you said you had an issue with valve train rattle. So you could go ahead and spend the time and money for new gaskets and end up doing the whole process over again for new lifters,rods,valves,springs, basiclly a new head job. You can see where this is going. As far as the engine bearings are concerned, if you don't have water in the oil, your probably OK. But who knows what they look like from just the 200k on them.
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Old Feb 9, 2010 | 07:12 PM
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I never try stop leak because I fear stopping up the radiator and heater core. As far as bearings go, I can replace rods & mains in my 87 Coupe in about 2 hours. No big deal.
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Old Feb 9, 2010 | 07:28 PM
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Not recommending ....... just informing.....

http://www.rxauto.com/
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Old Feb 10, 2010 | 12:21 AM
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Originally Posted by ~Oakley~
New head gasket is the permanent fix. I would try that sealant the auto chains sell. Goodluck.
Not really a "permanent fix". As people have replaced their head gaskets just to have them leak again in a year or so.
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Old Feb 10, 2010 | 08:02 AM
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Originally Posted by joshwilson3
Not really a "permanent fix". As people have replaced their head gaskets just to have them leak again in a year or so.
If they leak a year later, they are doing something WRONG.
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Old Feb 10, 2010 | 08:25 AM
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Originally Posted by surfer92
New headgasket $40, exhaust $15 and intake $15, so for $70 odd dollars the leak is fixed and about 4-5 hrs work.
Get your headgasket from here -
http://www.cnc-motorsports.com/product.asp?ProdID=20111


Only things I would add to that is to do BOTH head gaskets while you have it torn down that far. If one head gasket went, the other probably isn't far behind. Also, take heads to machine shop to check for cracks & any possible warp.
DO IT RIGHT THE FIRST TIME!!!

P.S. I have an 89 coupe with 80,000mi. and I just had my head gaskets replaced, and I'm glad I did it right. Ease of mind!!!
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Old Feb 10, 2010 | 07:07 PM
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Originally Posted by lbrehm02
I have no water in the oil or the coolant. So what does this mean?
"I noticed the passenger front two plugs had water on them. changed plugs and filled with antifreeze/water mix noticed white smoke when cold then clears up."

Those are the clues.

Jake
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Old Feb 12, 2010 | 06:38 PM
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Originally Posted by JackDidley
If they leak a year later, they are doing something WRONG.
There's been debate about what the correct head gasket to use. I believe there were people having issues with Felpro 1010 leaking a year later.

Anyways, what headgasket do you say is the correct to use on an L98 with aluminum heads?
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Old Feb 12, 2010 | 06:44 PM
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Originally Posted by JackDidley
I never try stop leak because I fear stopping up the radiator and heater core. As far as bearings go, I can replace rods & mains in my 87 Coupe in about 2 hours. No big deal.
yup how does the stuff know the diff between the coolant passages and the leak? it doesn't that's how.. don't use it.
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Old Feb 12, 2010 | 06:46 PM
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Originally Posted by joshwilson3
There's been debate about what the correct head gasket to use. I believe there were people having issues with Felpro 1010 leaking a year later.

Anyways, what headgasket do you say is the correct to use on an L98 with aluminum heads?
isn't the 1010 a thiner gasket?
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Old Feb 12, 2010 | 08:07 PM
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The Fel-Pro #1010 is .039 compressed
#1003 is 041 compressed
This is still less than the factory of .052 compressed.
I've read somewhere that there is a "new and improved" #1010 that is black with raised silicone beads around the water jackets?
I'll be changing head gaskets on a 89 in a few weeks, so I'm trying to follow this thread for any and all opinions on gaskets

Joel
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Old Feb 13, 2010 | 12:33 AM
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Originally Posted by ch@0s
isn't the 1010 a thiner gasket?
I don't know anything about it. I've just read of people having problems with that headgasket on an L98.

I never did read anywhere as to what the correct headgasket to use on an L98 with the aluminum heads. I guess if all else fails, the dealer could supply headgaskets.
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