truckman5000

I have a 445 f heads that the intake manifold crossover ports are pluged in the heads.
on a cold start you here a clakkiin sound, once warm goes away.
anything to wort about..
last year I pulled intake and put bookokie in the passage it was fine for 6months or so..noise back.

RetroRanger

I have read the edlebrock file fit plugs can rattle is that what you have as opposed to a poured filler like aluminum?

What is bookokie? I got some interesting google results for that but surely you didn't?

classicmuscle442

For racing purposes you need alumunum heads and I could take those F heads off your hands.

truckman5000

there poured aluminum but one side isnt 100%filled. So yes it rattles. I put jb weld stuff on but it wasnt jb weld but similar.
Wondering though if both sides are plugged but 1-side leaking by, will it cause any damage? thinking no but wanted to see. tnx

matt69olds

I use the 2 part epoxy that’s comes in a plastic roll you find in the parts stores. I can’t recall who makes it, but it has 2 flat squares of putty wrapped up in a sleeve. It takes 3 tubes to mix enough to fill both sides of the installs. I have done this for years once it’s there it doesn’t seem to move or burn away. Much better than trying to fit those plugs in place.

truckman5000

ok thats what i used. wonder is theres a broken valve spring..its a crackling sound that you only here on idle and goes away when engine is warm

Bernhard

Others that have tried high heat specialties epoxy's have not had it stand up over any length of time.
How long have you been running this type of epoxy and what type of driving has it been subjected to?
Thanks

matt69olds

The epoxy was put in a old pair of C heads that I ran for 10 years at the track and street. I sold them to a friend who ran them after I installed aluminum heads. When he tore down the engine for a rebuild and aluminum heads the epoxy was still there. I’d say it held up pretty well.

Bernhard

I would say that is better than well !!!
Do you know what type of epoxy you used?
There is another thread on Classic Oldsmobile were a ceramic high heat epoxy was used and failed.
I know their is a few of us that were looking for a product that could be used on heads that are already machined.
Was there any sign of the epoxy breaking down?
Was it high heat epoxy?
Thanks

classicmuscle442

Thought they made a metal plate that fits into intake gasket to block heat crossover.

Bernhard

Yes there are many on the market.
Filling is better as it helps flow when you fill the cross over with aluminum or other.

matt69olds

Next time I’m at the parts store I’ll see if I can find it. The heads had been off the cars a few times over the years for various reasons, they were always covered with carbon that flakes off easily, but the epoxy seemed pretty solid.

Bernhard

Is this the product?
It says its good to 500 F comes in a putty
http://www.bluemagicusa.com/index.ph...ic/category/11

matt69olds

That’s the stuff. I use an entire tube on each side of the intake, seems to work pretty well.

Bernhard

Does your friend still have the heads?

matt69olds

I’ll have to check, I’m not sure what he did with them.

11971four4two

I have the ones that you can un bolt and turn

The chunks of junk will rattle
The plate of stainless in the gasket slightly better

Bernhard

Never had a problem with the stainless steel block of plates.
What do the bolt version look like?

Fun71

That seems about 500ºF too low for something in the exhaust right at the heads, but can't argue with the first-hand experience with it.

Bernhard

Exactly it worked but is only rated for 500 F. The high heat epoxy failed that was rated at much higher temperature.
Filling the cross over is risky you have aluminum that can come loose and rattle
Cast iron plugs that can come loose and rattle
The new pined aluminum pour method looks good, but is only for non final machined heads.

Bernhard

Has anyone tried cast iron plugs and epoxy?
Pined cast iron plugs?
pined and epoxied cast iron plugs?

truckman5000

So, maybee 1k miles.

I'm assuming the rattle isn't anything to worry about.

funny as I got a message...this isn't high performance related, idk...just thought it was a good spot to put my post, didn't mean to not reply..been really busy. But thanks for the replays guys