302 EGR Carb Spacer Plate

[JT]

Hi all.

Maybe I'm looking in the wrong places on the net but I cannot find a replacement spacer plate that goes between the carb and the intake manifold...the one to which the EGR valve attaches.

As you can see from the pics, when I removed mine, gas eroded thru one of the lines, therefore I need a stock replacement.

I've searched the web for the base part number (9A589) as listed on www.broncocity.com (http://www.broncocity.com/66_77_techpages/eb_emission751.htm) but can't find one.

Any help locating one would be greatly appreciated.

Thanks,

JT

 

[73azbronco]

If your looking to bypass the egr, never discount the capability of JB weld to fix anything. Just make sure the parts are squeeky clean.

 

[JT]

I will try JB as a last resort. Really want to find a replacement part.

Am not sure if it matters or not but my Bronco is a '75.

 

[markperry]

I've been searching the Mustang parts catalogs and can't find it there either?

 

[gr8scott]

Give these guys a call, they might be able to hook you up or point you in the right direction.

http://www.ponycarburetors.com/default.asp

 

[gtnorga]

Saw one on eBay that looked really close item # 120999104319 $20. I bought my head air injector valves on eBay. Perfect fit.

 

[JT]

Give these guys a call, they might be able to hook you up or point you in the right direction.

http://www.ponycarburetors.com/default.asp

Thanks...will give them a call on Monday.

JT

 

[jckkys]

I quickly found several on EBey. A couple were cast iron that won't erode. The part #s likely won't match but they will work better. Just make sure the port in the intake is in the same place.

 

[JT]

I quickly found several on EBey. A couple were cast iron that won't erode. The part #s likely won't match but they will work better. Just make sure the port in the intake is in the same place.

I just checked e-bay myself and found the same ones you did. I looked at the cast iron one and read on a mustang site the Ford went to cast iron in '77 due to corrosion problems with the aluminum ones.

When you say "make sure the port in the intake is in the same place", it appears that the intake port on the cast iron one goes thru slots in walls, while the aluminum one goes directly into the center between the two holes.

I've posted the aluminum one on the left and the cast iron one on the right.

Do you think the cast iron one will work? It seems to me that the open port on the cast iron one would interfere with the stock gasket for the aluminum one.

JT

 

[73azbronco]

my understanding is pony carbs is closed for good, owner passed away.

 

[jckkys]

I would be willing to buy it were I in your position. You'll notice the D7 I.E. '77 part # on both. The cast iron is pretty bullet proof and a recessed hex drive 1/8" pipe thread plug allows you to go EGR or not while keeping stock appearance.

 

[JT]

I would be willing to buy it were I in your position. You'll notice the D7 I.E. '77 part # on both. The cast iron is pretty bullet proof and a recessed hex drive 1/8" pipe thread plug allows you to go EGR or not while keeping stock appearance.

The aluminum one has a D5 part number...'75 if I'm not mistaken. My bronco is a '75 and that's the part number on mine. D50E-9A589. The gasket between the plate and my carb has a base number of 9C477.

JT

 

[jckkys]

The D70E cast iron version would clearly work perfectly. The PVC connection is even identical. I'm certain it's what was original on my '77. The aluminum version eroded on many applications. Some high dollar aluminum intakes for '60s muscle cars had exhaust eat through the cross over requiring welding to repair. No emission law would have a problem with it and there is no other reason to use an aluminum part.

 

[JT]

The D70E cast iron version would clearly work perfectly. The PVC connection is even identical. I'm certain it's what was original on my '77. The aluminum version eroded on many applications. Some high dollar aluminum intakes for '60s muscle cars had exhaust eat through the cross over requiring welding to repair. No emission law would have a problem with it and there is no other reason to use an aluminum part.

I agree that the '77 used the cast iron plate. What I am unclear about is if the D7 cast part will work with my '75 carb, meaning will the gasket fit correctly. it looks like the gasket I use on my '75 would sit unsupported over the intake runners of the D7 part. On the D5 part there is metal directly between the holes on the intake side that matches the holes in the gasket. In the pic I posted of both, the holes in the aluminum D5 Are like a "figure eight" whereas the holes in the D7 have the gaps on the right side (at the 5o'clock position for the top hole and the 1 o'clock position for the bottom one) in the pic for the intake stream.

I dont know the stock carb model on the '77 or if it's the same as the '75.

I just want to avoid leaks.

 

[JT]

Ok...I made a mistake. I was thinking that the circled parts in the pics below mated to the carb when I realized that they actually mate to the top of the intake manifold.

That said, the gasket between the manifold and the bottom of the plate will not cover the same bearing surface on the steel part like they do on the aluminum part.

Two questions:
1) Is the shape of the opening in the '77 manifold different than the '75 to accomodate for the different ports in the pics below?

2) If I use the '77 cast part on my '75 manifold with the stock '75 gasket, do you think it will leak?

Thanks,

JT

 

[jckkys]

The discharge of exhaust gases in the aluminum version were routed through a chrome plated 1/2" OD steal tube inserted trough the back of the spacer. The cast iron spacer has no tube. That's the only difference between them. The port in the intake is in the same place, in front of the right rear carb stud. Ford used these tubes on some 2bbl and 4bbl spacers in both iron and aluminum. I believe they were to ease clean out of carbon deposits. Both spacers use the same gaskets. All EGR 2bbl 302 cast iron intakes are the same except casting numbers. Any parts store can verify that the gaskets are the same. Ford simply learned that aluminum was a poor material for this part and '77 was the year they fixed it. Even the EGR spacers on 5.0 HO 4bbl engines were iron in the '80s and the intake on these was aluminum.

 

[JT]

Thanks. I am going to buy the cast iron one. Appreciate your input!

 

[JT]

So...I bought the 1977 cast iron carb spacer for my 1975 Bronco. The cast iron part doesn't fit exactly like the 1975 stock part did.

On the cast iron part there is a flange where the EGR valve attaches to the back of the spacer. When seated on the mating surface of the manifold mount, this flange interferes with the top of the manifold underneath the EGR valve. This interference does not allow the carb spacer to fit flat on the manifold mount. On the aluminum part, there is no flange so there is no interference.

I think I can grind down the flange of the cast iron spacer so I should be ok. Just thought I'd let everyone know that the '75 and '77 spacers are not exactly interchangeable.

JT

 

[Ovalis]

I had the same issue and used the thicker carb gasket between the manifold & spacer as well as between the spacer & carb along with longer studs and it cleared on my engine.

 

[jckkys]

I used a cast iron Ford 4bbl spacer on an Edelbrock Performer EGR 351w intake. I had the same situation with the bottom of the flange keeping the spacer from going all the way down. The Edelbrock gasket that comes with the intake was thick enough to work but I ground about 1/8" off the flange to allow things to work without a gasket. I believe the parts are designed to work with a thick gasket. I saw at least 10 of the iron 2BBl intakes at a yard today, and the carb pads were all identical. Perhaps a relief was machined on the top of '77 and later intakes. The small grinding isn't visible and the outer contour of the spacer matches the carb pad and when painted blue looks like it belongs there.