26 replies to this topic

[Mort]

Just a thought, have you checked to see if the mounting surfaces are level.......maybe the housing has a little warp or not cast flat and the same with the intake manifold.

 

I used Blue Max sealant (blue goo) on both sides of the gasket on mine to make sure it sealed, i also run a file over the mounting surface of the housing and manifold to make sure they were level.

[76lxhatch]

Those chrome ones are horrible things, they warp easily (and quickly). I wonder if perhaps cranking that up repeatedly has warped the manifold surface? I'd try sanding it with a flat metal block or something to try and get it back if that's the case. Same applies to the new housing as Mort says, if its not flat - glass is good for checking whether flat or not.

[rexy]

Bolts too long? Have you checked that the edge of the thermo housing isn't catching on the manifold somewhere preventing it clamping properly?

[Mort]

How did you go Scott, did you find the problem.

[Rockoz]

Check for level on housing and manifold. Double check that the thermostat is seated in its spot properly.

Best sealant I have used is Wurth Red Hi Temp.

Have used it instead of valley gaskets on Holden and Chev V8s with no leaks.

Have seen it used to seal up all sorts of things without dismantling as well.

Used it on a sump and needed a cricket bat to break the seal but then it cleaned up easily afterward.

Its pretty magic stuff and havent found anything quite as good as it.

[rexy]

Can you see the exact spot where it's leaking?
Sure it's not dribbling does from the hose connections or out an area of manifold/ housing porosity?
If in doubt, run the car after wiping it clean and watch like a hawk.

[Mort]

Do you have another housing other than the chrome one or able to borrow one to try, maybe the one you are using has a pin hole in it or maybe porous.

 

You could try fitting the housing to another engine, i know it's a lot of frOcking around but it might give you an idea if it's your housing thats the problem or your manifold.

[Rockoz]

What brand sealant are you using?

[Oversteer]

Devcon will fix it if your desperate... won't be that hard to remove if need be, just clean surface to carby cleaner, no gasket and allow to dry for 12+ hours before filling.

 

If that doesn't work it has to porous somewhere or something !

[Shiney005]

Sounds like the inhibitor is the common denominator here. Going the opposite way is even worse. Mt father used the Tectaloy green inhibitor in his near new Landcruiser and three weeks later the radiator looked like a sponge. There were tiny little pin pricks all through the core.

[EunUCh]

Is the housing itself flat ?,never used coolants other than water,never had a problem with the gaskets and some permatex or loctite aviation goo #3 let to soak in for few minutes before pulling down bolts then nip up a bit after running. 

Edited by EunUCh, 18 August 2014 - 05:27 PM.