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Jan 2, 2002 | 04:17 PM

fordzrule

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Mountain Pass

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From: Ozark Arkansas

exhaust

can the crossover tube on the back of the heads leak exhaust. ive replaced the gaskets on the collectors and on the heads but i cant stop the stupid leak

Jan 3, 2002 | 10:20 AM

Franklin2

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From: Virginia

exhaust

Yes, these are famous for rusting out, especially if the smog pump has been disconnected. I made a solid gasket for the back of the heads, and used it to block it off.

Jan 3, 2002 | 04:10 PM

slikness

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From: Durham

exhaust

Ford sells the plugs for the back of the heads and they are fairly reasonable.

Jan 7, 2002 | 10:38 AM

yrlngproject

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From: Green bay USA

exhaust

slik, have you got P/N's for these smog tube covers? my dealers parts guys didn't know anything about them??\
gene:-X23

Jan 7, 2002 | 07:30 PM

Franklin2

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From: Virginia

exhaust

I thought I heard somebody say they used regular drive in plugs like freeze plugs. But I would think these would be hard to get in with the engine installed. That's why I just made a block off gasket.

Jan 7, 2002 | 08:20 PM

Caddy 53

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From: oh

exhaust

If my memory serves me right that tube is held in place w/ couple hex bolts (5/16 ?). How about a flat plate bolted over hole w/gasket

CADDY 53 chuck centerburg oh

Jan 7, 2002 | 11:37 PM

slikness

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From: Durham

exhaust

I think I've still got a set in the original plastic bag with the P/N still on them. It will be tonight (Tuesday) before I can dig them out and I'll post the number.

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Jan 8, 2002 | 02:24 PM

slikness

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From: Durham

exhaust

I tried to find plugs that worked, but, if they are the same air pipe holes that I have in the 351W heads, they are not pipethread. The size and thread are unique as far as I can tell.

Jan 8, 2002 | 06:25 PM

#10

slikness

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From: Durham

exhaust

The plugs are called inserts and come in a package of 2. The numbers on the package are F4ZZ-6E086-A and H751B 021398. It is a course threaded plug about 3/4" long and the inside is threaded so that you can use the plug for a bolting something to the head. The front of the head probably already has these plugs in place.