1. Home
  2. Automotive Technologies
  3. Exhaust manifold no longer made- option?
  4. Page 2

Exhaust manifold no longer made- option?

Chances are it is original. While I am not at all familiar with Ford products, I do know that back in that era 49 state trucks over about 6000 pounds GVW were exempt from emission controls, and were designed to be operated on leaded or unleaded fuel.

So while I can see someone going to the trouble to remove an air pump and all it's plumbing, I cannot see them going to the additional trouble and expense of changing out the entire exhaust manifold.

I purchased a new 1978 GMC heavy half ton pickup with a 350 gas engine that has no emission controls at all. No air pump, no catalytic conv., no EGR. It does have a preheat air cleaner and a coolant temperature switch for the distributor vacuum advance.

Lee Richardson Evansville, Indiana

Reply to
Lee Richardson
Loading thread data ...

Please disregard my reply, I forgot he was working on a car and not a truck.

Thanks, Lee Richardson

Reply to
Lee Richardson

He's driving a '79 fairmont with a 250cid 6. Ford truck sixes are the

230 and 300 and a different engine family.

The '78 fairmont my parents had, had an airpump. The '82? mustang the neighbor kid had, had an airpump. Every '75 and up ford small six I've seen in the junkyard has had an airpump. My '75 maverick with a 200cid 6 had an airpump. My'73 maverick does not have an airpump, the change was in 74 or 75. The picture in the '78 shop manual shows the airpump, but it's a picture from the driver's side so only the pump itself is visible.

If you have an old manifold laying around it's cheaper and maybe even easier than screwing around with plugging the lines. Having worked on these engines with and without the thermactor system, removing it entirely and replacing the manifold is the best solution. The damn thing is always in the way. It blocks access to the front and much of both sides of the engine.

Reply to
Brent P

What I have is a '79 Granada 250ci. I should have mentioned that the new OEM exhaust manifold is tagged to be for a '75 Granada 250ci. It's official part # is D5DE-9430-CA. I wonder if the CA means california version which seems to me would have a higher emissions standard.

B.

Reply to
Bubba

Opps thought you said fairmont...

CA is just the revison as I recall... Ford doesn't change the year on the part number unless the part actually changes, so it would carry D5 in '79 if it didn't change.

Reply to
Brent P

I finally plugged the manifold ports because I'm installing it tomorrow.

The best I could find to plug the emissions holes were tractor wheel lug bolts at Tractor Supply. They were too long so I cut them shorter. The threads were a hair off. After 3/8" of screwing in they would start to cross thread. I cut them to 1/2" long and tightened them in until they bottomed out agains the tapered head. I used high temp threadlock also and they are very tight and seated well.

The farthest hole to the back was different. My old manifold has this one emissions port which is jury-rigged plugged. I found that a standard cast iron pipe plug fit this very coarse thread perfectly and I installed it into the new manifold as above. I don't know how they'll ever come out, but with my luck they will.

Thanks again for all the great advice. I still can't believe I found a brand new manifold using the recommended links.

Bubba.

Reply to
Bubba

MotorsForum website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.