[Scott Thelander]

So
I am cleaning up a couple timing cover s today to sell and I have 2 different styles of plates
1 is cast aluminum and steel
The other is the standard steel steel

Was the cast aluminum early 64???

Thanks

[Scott Thelander]

ok
theres a part number on the back 9773375
and
I fingered it out thanks guys for the post 1 year ago

https://forums.maxperformanceinc.com...d.php?t=851967

[BOB VIDAN]

Fingered???????????? Of course you did.

[geeteeohguy]

I could swear the original plate on my '65 GTO is aluminum. Engine cast date is Feb. '65. I coat all my plates and inside the timing covers with Glyptal to prevent electrolysis.

[64-3Deuces]

Originally Posted by geeteeohguy

... I coat all my plates and inside the timing covers with Glyptal to prevent electrolysis.

Did you ever get a chance to check and see how the Glyptal held up?

I painted mine with Rustoleum enamel. Not assembled yet and I was thinking about using POR 15 instead.

[geeteeohguy]

Originally Posted by 64-3Deuces

Did you ever get a chance to check and see how the Glyptal held up?

I painted mine with Rustoleum enamel. Not assembled yet and I was thinking about using POR 15 instead.

No, and it's been 12 years. But I've used it in other engines and have never had it come off or fail. It sets up like porcelain or epoxy. Very hard and durable. And not expensive, either.

[64-3Deuces]

Geeteeohguy,

I've used Glyptal in engine block lifter valleys and never had a problem but never thought about using it for the timing cover. The electrolysis issue and the general corrosion of the timing cover is why I initially applied the Rustoleum. Sounds like the Glyptal might be a good bet.

[lust4speed]

I used POR 15 on a timing cover inside the water pump area. Six months back on the road and I noticed little flecks of black about the size of metal flake. Even though I had media blasted the cover it only took six months for it to start flaking off. Over time the impeller of the water pump then took the small chips of POR 15 and reduced them to micro flakes. It would be interesting to know whether the Glyptal would hold up any better.

Just for the record, the repairs I have made with JB Weld started to fail at about the 7 year mark. It seems that both instances the problem might have been with the antifreeze slowly making its way under both the POR 15 and JB Weld. I'm wondering whether that even blasting and cleaning the surface still has some embedded corrosion that finally lifts the repair.

[64-3Deuces]

Originally Posted by lust4speed

...It seems that both instances the problem might have been with the antifreeze slowly making its way under both the POR 15 and JB Weld. I'm wondering whether that even blasting and cleaning the surface still has some embedded corrosion that finally lifts the repair.

Some good info there. My cover is a NOS that I purchased years so the blasting/embedded issue won't be a concern. I initially went with Rustoleum as that is supposed to be real durable and stand up to water. I read the POR15 specs and it's supposed to resist battery acid, other chemicals, etc. but not really sure about the long term durability of any of these.