Blocking cylinder head exhaust crossover

Doug Domm · 10-31-2020, 07:37 PM

I’m asking for suggestions on what to use and tips on doing this? Thanks

SSDiv6 · 10-31-2020, 08:10 PM

Quote:

Originally Posted by Doug Domm

I’m asking for suggestions on what to use and tips on doing this? Thanks

Melt an aluminum bar or an old piston or use Cotronics Durabond Epoxy 7032 or Loctite 2000 degree putty.

http://www.cotronics.com/WEB%20SHEET...plate%20NP.pdf

https://www.grainger.com/product/2TK...P7A1P:20501231

Jeff Stout · 10-31-2020, 10:27 PM

Dont use lead. I made bvb that mistake. I made a stainless plate to cover crossover and put under gasket.

Dwight Southerland · 11-01-2020, 07:18 AM

Plaster of Paris.

Doug Domm · 11-03-2020, 01:51 PM

When pouring aluminum what prep to the head? Do you heat or warm the head? I’m thinking maybe heat them up in the barbecue before pouring and again after pouring to slowly bring the heat back down? Or am I overthinking this?

Dean Feiock · 11-03-2020, 03:57 PM

Zinc bar. Easy to melt and no shrinkage.

No cylinder head preheat needed.

Try Mondello Performance or McMaster-Carr industrial supply.

SSDiv6 · 11-04-2020, 03:38 PM

Quote:

Originally Posted by Doug Domm

When pouring aluminum what prep to the head? Do you heat or warm the head? I’m thinking maybe heat them up in the barbecue before pouring and again after pouring to slowly bring the heat back down? Or am I overthinking this?

10-31-2020, 07:37 PM	#1
Doug Domm Member Join Date: Apr 2006 Location: canada Posts: 252 Likes: 29 Liked 85 Times in 22 Posts	Blocking cylinder head exhaust crossover I’m asking for suggestions on what to use and tips on doing this? Thanks

10-31-2020, 10:27 PM	#3
Jeff Stout VIP Member Join Date: Dec 2001 Location: phoenix Posts: 1,491 Likes: 66 Liked 708 Times in 285 Posts	Re: Blocking cylinder head exhaust crossover Dont use lead. I made bvb that mistake. I made a stainless plate to cover crossover and put under gasket.

11-01-2020, 07:18 AM	#4
Dwight Southerland VIP Member Join Date: Dec 2001 Location: Arkansas - In the middle of everything. Posts: 2,003 Likes: 64 Liked 784 Times in 196 Posts	Re: Blocking cylinder head exhaust crossover Plaster of Paris. __________________

11-03-2020, 01:51 PM	#5
Doug Domm Member Join Date: Apr 2006 Location: canada Posts: 252 Likes: 29 Liked 85 Times in 22 Posts	Re: Blocking cylinder head exhaust crossover When pouring aluminum what prep to the head? Do you heat or warm the head? I’m thinking maybe heat them up in the barbecue before pouring and again after pouring to slowly bring the heat back down? Or am I overthinking this?

11-03-2020, 03:57 PM	#6
Dean Feiock Member Join Date: Aug 2002 Location: Pierre, SD Posts: 204 Likes: 0 Liked 49 Times in 15 Posts	Re: Blocking cylinder head exhaust crossover Zinc bar. Easy to melt and no shrinkage. No cylinder head preheat needed. Try Mondello Performance or McMaster-Carr industrial supply. __________________ Dean Feiock -- Stock 5002