Manifold gaskets-Graphite or Green?-gctid348578

[Guest]

Just took off elbows and risers for a check-parts looked fine but still had some weeping around the joints. I've been using the silver Mercruiser gaskets dry, but a local mechanic suggests trying the green paper gaskets with sealer. Any thoughts? I've not had good luck with getting the dry silver gaskets to seal.

[Guest]

MikeMag wrote:
I've been using the silver Mercruiser gaskets dry, but a local mechanic suggests trying the green paper gaskets with sealer. Any thoughts? I've not had good luck with getting the dry silver gaskets to seal.

I don't know about paper, but I have been told time and time again, do not use a sealer. Never was sure why. I used gaskets from eBasic Power ordered online, they were silver but a soft surface that seemed to accommodate some surface imperfections, never had any problems. Hope it helps.

[Guest]

I currently have the green ones on, and I went against all the "experts" advice and put aviation gasket seal on.

They currently have about 200 hrs on them and not 1 drop of water and no rust creeping, so I for one would recommend the green with sealer. Use at own risk, no warranty implied or expressed, mileage will vary - hahahaah

just my .01 cent

[Guest]

Thanks for the info, I think I'm goin green and goo this time around to see how it seals. It's not that much of a chore to pull risers and spacers again if it doesn't work out. Jeff, was that Permatex #3 you used?

[Guest]

Color really isn't an issue, or a indicator of gasket material, If your flanges are in good shape a 1/16" or 1/8" compressed gasket material, usually aramid fibre with a nitrile binder good to 750 degrees is fine, I go one step further and use a asbestos compressed gasket sheet good to 1000 degrees, as far as useing sealer all you really do is squish it out or create uneven surfaces creating a leak path or obstruction on the inner pathway's, dry is fine maybe retorque after warm up, Doug

[Guest]

MikeMag wrote:
Thanks for the info, I think I'm goin green and goo this time around to see how it seals. It's not that much of a chore to pull risers and spacers again if it doesn't work out. Jeff, was that Permatex #3 you used?

Mike, I don't remember off hand. I would have to look at the tube at home. I keep thinking it was aviation (is that #3?) That was many years ago and my memory is not great. I will look tonight when I get home.

[Guest]

No worries, went and talked to the mechanic again, and they said to use the liquid form-a-gasket stuff. They think this setup works better for saltwater, we'll see how it holds!

[Chief_Alen]

I use aviation form a gasket, have been using it for 40 years.

I put that **** on everything.

I use it on mani's and head gaskets. Riser gaskets no problem see it doesn't melt.

Others will melt.