Sump gasket sealing

[maltloaf]

Hi,

As I am having problems posting a new thread I through I would repy to make my question appear.
I am trying to find a suitable sealing compound for a sump gasket on a Fiesta RS Turbo. The problem seems to be that the gasket does not fit very well. So to fill the gaps I am look for something that can resist the hot oil, and form a seal as the rubber gasket should do. I have tried "instant gasket" but this does not seem to last very long. Would simple silicon sealer do the job?

Cheers

Matt B.

[andys2]

I've always used a bit of red hylomar when sealing the sump on my Range Rover, put a thin smear on both sides of the gasket and leave it for a few mins to go tacky.
I've done this 2 or 3 times and never had any problems with it leaking.

Andy

[wheeljack888]

Hi

These are expensive (£20 for 300ml, although there are smaller sizes) but the best type are heavy body rtv silicone sealants, something like Loctite 5900 or Hylomar 532. Try a local engine remanufacturers for these. Be warned, you may not get the bugger off again though!

Cheers

Phil

[nighthawk]

Be careful if your going to use a silicone sealer on that gasket,

The black rubber gaskets are quite soft and i've seen more than one split as the engine warms up when sealants have been applied.

A thin smear of clear instant gasket type sealer should be enough to hold the gasket in place while you position the sump and tighten it.

[wheeljack888]

Do apologise...

Forgot to say you won't need the rubber gasket. Not a fan of rubber or cork gaskets because they suffer from torque relaxation from the bolts over time, unless you use some mental thread lock.

Another problem with silicone sealant I might have missed is if the sump gasket is not sealing on a flat plane, like the sealing arch on a kent engine main bearing cap then the sump sealing flange has been designed to fit the gasket thickness. This maybe a problem on your engine which is a kent derivative. (Sorry designed before I arrived at Ford and I'm not that familiar with the CVH variant)

>> Edited by wheeljack888 on Wednesday 1st June 21:12

[anonymous-user]

Not personal experience, but from what I've read, be *very* careful using a sealing compound to seal the sump. If any gets squeezed into the sump and clogs the oil pick up pipe, bye bye engine.

[maltloaf]

Thanks guys, this is great. I managed to get some loctite instant gasket I think it was something like 5695. I will leave it go off overnight on the car. Hopefully I put just enough so that it does not squeeze any in to the sump.

Cheers

Matt B.