Sump Gasket Sealants

[MarkBzero]

Hi,

I have fitted the ATR sump from GBS, but I cannot get a good seal with a few small leaks. It comes with a cork gasket. Whats the best sealant to use to ensure a oil free seal, I do not fancy repeating this job again.

[kevin the chicken]

I use wynns black rtv gasket sealant. Comes in quite a big tube so it is not the cheapest but it's good stuff.

[tractor]

I use the neoprene foam and a light smear of gasket sealant

[richyb66]

Halfords sell Loctite 5980 sealant which it what is recommended on RV8. Used it on mine with no gasket and no leaks.

[MarkBzero]

I use wynns black rtv gasket sealant. Comes in quite a big tube so it is not the cheapest but it's good stuff.

A lot of positive praise on the internet, but many different makes and not all are good.

[MarkBzero]

I use the neoprene foam and a light smear of gasket sealant

Which type and thickness please?

[MarkBzero]

Halfords sell Loctite 5980 sealant which it what is recommended on RV8. Used it on mine with no gasket and no leaks.

Used without a gasket, very tempting assume theres a curing time before tightening.

[tractor]

wot sump do you have

[richyb66]

You just apply the sealer and torque down as normal as it can seal from a thin film to several mm thickness. From memory I just ran a 6mm bead all round and went from there.

 

Cure strength improves with time - they suggest 7 day for maximum cure before heavy service. As this normally used in OEM applications, the long cure time isn't a problem.

[MarkBzero]

wot sump do you have

GBS ATR lowered sump.

[WallerZ]

Another vote for RTV sealant! Have used it to success on my sump and oil cooler/filter housing surfaces without an intermediate gasket (cooler/filter housing is under pressure too!) I can confirm the best thing is a long cure time too. Once I fixed it properly, it hasn't leaked since!

[MarkBzero]

Job finished, it looks like the front 4 bolt holes in block are slightly shorter than than the rest. I had to shorten the sump bolts by 3mm. Everything is holding for now.