Help on upper rad manifold leak... (1 Viewer)

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Apr 26, 2004
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I'm kinda bummed- I was planning on driving my 55 to Oregon this weekend and found this yesterday while installing fogs.

What do you guys think? Is this a common leak? Should I take it on the trip anyway and just keep a bottle of coolant handy?
DSC04974.jpg
DSC04975.jpg
 

John McVicker

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Jul 11, 2005
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Big Pine, CA
Need to address this sooner rather than later.

I'd replace your T-Stat, with new bottom gasket AND new rubber 'O' ring on top.

And replace All rad. hoses. Your bypass hose looks particularly suspect.

Snug everything down, look for leaks & you're likely good to go. One hour's worth of work.

John
 
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So- I'm no great mechanic, but is the thermostat inside that thing?
 
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Feb 14, 2009
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Portland, Oregon
i found the freeezing bolts ....

are from the last guy getting sealer on the threads, and it acts like a supper lock tite.

so be a bit careful when you assemble yours.
 
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are from the last guy getting sealer on the threads, and it acts like a supper lock tite.

so be a bit careful when you assemble yours.

Ok, what kind of sealant do I need to use during the re-assembly, and where do I use it?
 
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Portland, Oregon
i use ...

the blue gaskest sealer for water systems. i usually wait for a few hours after application to run the engine, so it has time to seal/harden enough not to swim around in the coolant lines. and plug the NEW THERMOSTAT... dont ask why i know that...:bang:.

the name of it is, Ultra Blue Sealer.

Advice... dont buy the big tube. if it is months between usage, the rest/balance of te tube will or better said, might harden in the waiting period. so, i end up waisting most of my purchase... if your doing lots of sealing, then the bigger tube. if just the thermostat housing, small tube.
 
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Simple RTV is what I always use. There are some generics and a high temp version. I have used the high temp stuff to seal a chamber attached to an exhaust manifold, no problem. Good stuff.
Probably half the price of something called "Blue gasket sealer" and in the end it is the same thing. The tube I have has been around for 10 years plus. Looks like the day I bought it. I'm sure the Blue stuff is better know matter how many times you need to buy it.:cool:
 
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Joined
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Thanks guys- I was thinking high temp silicone, but wanted input.
 

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