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Antique Engine Archives All archived posts from 1999 to 2004 when SmokStak was on EnginAds. This is a read-only board.

Antique Engine Archives

Head Gasket Won't Seal


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  #1  
Old 10-15-2001, 08:04:43 PM
C. Props
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Default Head Gasket Won't Seal

I have two Waterloo style engines, a Gault and a Majestic. They both make the water in the water hopper bubble when on compression. I have put a new head gasket on the Gault and it still leaks when it is running, but I have not done anything to the Majestic. Neither of them have any cracks in the heads that I can see. The old head gasket on the Gault showed a bad spot that was causing the leak. Now I can not get the new gasket to seal completely. How can I get the head gasket to seal or is there a proper procedure for this?
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  #2  
Old 10-15-2001, 08:27:17 PM
SAM
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Default Re: Head Gasket Won't Seal

YOU MIGHT TRY LAYING A STRAIGHT EDGE ACROSS THE HEAD TO SEE IF YOU HAVE HAVE ANY LOW SPOTS. NOT FAMILIAR WITH THAT TYPE OF HEAD. I HAVE TOOK VARIOUS HEADS AND RESURFACED THEM USING A FLAT PIECE OF GLASS AND STICK ON SAND PAPER IF IT AINT WARPED TO BAD.JUST A THOUGHT.
  #3  
Old 10-15-2001, 08:42:03 PM
Ed Kinch
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Default Re: Head Gasket Won't Seal

Hello C. Props;Be sure you are not running out of good clean threads on your head bolts before you are getting full clamping force on the gasket.Be sure the gasket mating surfaces are not severely pitted or warped.If the head bolt threads in the block open into the water jacket they need to have a sealer on the threads.If the head bolts have not been out recently and do not come out easily they are probably sealed with rust.If there is heavy rust build-up on the studs at the block it may be preventing good crush on the gasket.lubricate the threads and the nut mating surface to the head so you do not get a false torque.Ed
  #4  
Old 10-15-2001, 10:22:12 PM
glenn
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Default Re: Head Gasket Won't Seal

I always coat head gaskets with gun grease and let it soak in a while. It softens them up a little and keeps them from sticking if you have to remove the head. Never had any to leak.
  #5  
Old 10-15-2001, 10:29:13 PM
Steven in ND
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Default highly unorthodox method

I had a couple of head gaskets leak on old stationary engines. Know what I used? High temp silicone sealer on the gasket. I have been running it for 3 years now with no problem. And yes, I do run it until the water steams so it is as hot as it can be. I used the blue silicone on one and the orange high temp on the other. Works great.

Steven
  #6  
Old 10-16-2001, 07:44:52 AM
Bob Kern
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Default Re: Head Gasket Won't Seal

I had a small Jaeger that had sealing problems. It had some pits that were significant. I cleaned the heck out of things and brightened them up with emery cloth and then used a high temp epoxy to fill the pits. As I recall, Chuck Bayleat (sp?) that is one of Harry's sponsors used to carry it and may still. JB weld and other epoxys don't seem to work too well in a high temp. application but this stuff is bullet proof. I got it dead flat with a straight edge after application and no problems since.
  #7  
Old 10-16-2001, 12:39:26 PM
RBackus RBackus is offline
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Default Re: Head Gasket Won't Seal

I've never used silicone, but I've had great luck with Copper Coat. There are probably a couple different manufacturers of the stuff. It's a spray-on sealant with a high copper content. As others have said, make sure everything's absolutely clean so you're getting full clamping force. I've never had it fail. Richard
  #8  
Old 10-16-2001, 02:25:36 PM
Tom Winland
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Default Re: highly unorthodox method

I've also used the blue silicone on many engines including large oil field engines and it has never failed me yet. I have one engine that it has been in for over 10 years now and still no problems.

Tom Winland
  #9  
Old 10-16-2001, 06:19:50 PM
John Hammink
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Default Re: Head Gasket Won't Seal

In my early days when I had just a few dimes, I used soft soap on both sides of the gasket and it never leaks again. Now in my better days I use a rattle can with aluminium spray that stands for 1800 degrees F. and I haven't had any leaks either. It's worth to try it ones.
  #10  
Old 10-16-2001, 07:47:09 PM
Lars
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Default Re: Head Gasket Won't Seal

An old timer also said paint both sides with Aluminum or silver paint. It is also supposed to work to seal stains from bleeding through paint. Another thing is to note if the new gasket is too tight to the stud bolts. It can crush and bind at the bolt creating a lump or tight spot. A slight chamfer on the head bolt holes will relieve that tendency and actually allow the pressure to spread out wider from the bolts.
 


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