1988 GT 5.0 Mystery part
- Thread starter rpatrick77
- Start date
Thermactor crossover tube.
The hose runs from the air pump located below the alternator to that pipe, which pumps air into the heads with the goal of helping the pre-cats acheive max efficiency during vehicle warmup. When the car is warm, the air is routed own to the H-pipe to feed those cats.
If you have no converters on the car, you can pull this all off and block the ports on the heads.
This is the part
The hose runs from the air pump located below the alternator to that pipe, which pumps air into the heads with the goal of helping the pre-cats acheive max efficiency during vehicle warmup. When the car is warm, the air is routed own to the H-pipe to feed those cats.
If you have no converters on the car, you can pull this all off and block the ports on the heads.
This is the part
79-93 Mustang thermactor head tube pipe w/ valve | eBay
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Bingo. YES You got it. I lost power and I hear it hissing.. ThanksThermactor crossover tube.
The hose runs from the air pump located below the alternator to that pipe, which pumps air into the heads with the goal of helping the pre-cats acheive max efficiency during vehicle warmup. When the car is warm, the air is routed own to the H-pipe to feed those cats.
If you have no converters on the car, you can pull this all off and block the ports on the heads.
This is the part
79-93 Mustang thermactor head tube pipe w/ valve | eBay
Find many great new & used options and get the best deals for 79-93 Mustang thermactor head tube pipe w/ valve at the best online prices at eBay! Free shipping for many products!www.ebay.com
Far from easy due to all the carbon build up on the threads. It's far easier to use the block off plates that LMR sells.
Back yard hack if you're not going to replace it, cut the tube an inch or so from the end that bolts to the head, smash it shut, fold it over then dig some of the crud out of the inside of the flat side, clean it with some brake cleaner and fill it with JBweld, let it sit a few hours, clean the gasket surfaces, new gasket or some red gasket maker, bolt it on and let it set over night.
Even easier if you're not going to replace.. cut the ends off at the heads, flip them over and bolt back on with some rtv
Gs1987GT
Active Member
I used the block off plates from lmr when I removed my smog pump. I sealed them with copper rtv and all has been well since. They work well and are inexpensive. The ports on the back of my heads were carboned shut anyway.
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