mopete1

im doing a waterpump and thermostat housing gasket change on my 89 f150, does anyone have a preference as to which will hold up better, like say felpro gaskets or permatex waterpump and thermostat rtv gasket maker, and im also doing an oil pan gasket, again felpro or permatex ultra black rtv silicone,

jljde

Both, right?

fordtrucknut

i use a gasket and then put a thin coat of grey permetex on each side of the gaskets, i even got the side plate on my i6's to stop leaking with the grey stuff.

i use the grey on paper and rubber gaskets

Welder7018

Go with felpro their a great gasket company and just for good measure id put a little bit of high tep gasket maker on it for good measure. make shure you COMPLETELY remove the old gasket with a putty knife. while im under the hood id check every thing all gaskets for dryrot or cracks and just check all the stuff on it for good measure. oh and make shure the area around it is clean or it will leak like a siv.

94centurion

I just use the gaskets that come with whatever part I bought. If it doesnt come with a gasket I use felpro. I dont add any silicone especially on rubber gaskets just bc usually theyre supposed to be reusable and the silicone will make them tough to reuse. I sometimes use some hi-tack to stick the gasket to a part for ease of installation.

94centurion

oh and another thing if you are using cork, say for valve covers or a tranny pan dont torque the bejesus out of it bc you will make it leak. snug is better than overtight when it comes to cork. Thats been my experiences with cork anyway.

jeepfan93

Unless you have severe pitting of the metal, the Felpro gaskets will seal. As stated, make sure you remove ALL the old gasket material. I use a razor and cleaning wheels on a drill or wire brush on a grinder. Then clean the metal with brake clean. A dab of silicone to hold the gaskets in place should be all you need.

mopete1

alright felpro with a little silicone to hold it to the part, thanks guys

offroad

i use the altra gray just a very thin coat just to hold gaskets in place.i use felpro only.torque all bolt evenly and shouldnt have problems.

qdeezie

For the water pump and thermostat, both of those come with the paper gasket. You have to use RTV in addition to the paper gaskets for the best seal.