litch2004

iTrader: (1)

This came from a ford guy but he said that for the head bolts that enter in a water passage he uses ultra copper permatex. Will this work or would you all suggest against this. This guy has been building ford motors for many years and has put down 500+ (F.I. Motors) on all his motors and has never has a problem. This is why i would trust his judgment but figured i was ask first.

robsquikz28

iTrader: (246)

use aircraft sealer or permatex 2 non hardening

litch2004

iTrader: (1)

so you would recommend against the ultra copper? Im installing the heads as we speak and i have some of the ultra copper here, all stores are closed so i would have to wait till tomorrow before i could get anything.

93Z2871805

iTrader: (5)

ARP just suggests that you seal the bolts that go into a water passage. If the guy is an experienced builder, regardless of brand, the same will hold true. I'd go for his suggestion. Copper is also an exceptional sealer and that's probably why he likes to use it.

litch2004

iTrader: (1)

ok i just wanted to see others opinions before i went in and did this and then upon crank up it leaks. But he assured me he uses this on his all day w/ no problems.

shbox

I would not use any RTV that could get into the cooling system. I won't break down and can cause clogs. For bolts, you use thread sealant made for that purpose.

Wicked94Z

iTrader: (26)

i used ultra copper silicone with my head studs and they seal perfectly.... no leaks

1badzee

iTrader: (12)

Permatex 2 here

monster81

i used cyclo red silocone

myltwon

iTrader: (1)

I used thread sealant on my head bolts

quik95lt1

iTrader: (7)

Black Permatex RTV on my studs here

SS RRR

iTrader: (2)

Permatex or thread sealant will work fine. Just make sure to only use it on the bolts that tap into water jackets. The ones that don't just use a very light (VERY LIGHT) dab of oil on the threads.

RamAir95TA

iTrader: (2)

RTV gasket maker on cylinder head bolt threads?

I'm more comfortable using thread sealant to seal the threads. Makes sense when you spell it out.

AChotrod

iTrader: (17)

I used permatex thread sealant.

SS RRR

iTrader: (2)

RTV is also a sealant. I've used it multiple times. No problems. As stated, pick your poison.

JAKEJR

Use whatever the bolt manufacturer recommends for their product. No need to re-invent the wheel here.

Jake

West Point ROCKS! Nation's TOP COLLEGE per Forbes Magazine!.

tonskiguy

iTrader: (3)

ARP thread sealant