1970 Ford Bronco 302 Intake Manifold

[tonytony9]

Hi all,

After clean up found the culprit of my oil leak (well, one of them), front corners and rear of the intake manifold, typical spots. I am going to tackle this weekend. I am going to using the Felpro Gasket Kit as well as Permatex Ultra Black.

Is upgrading to the ARP bolts worth it? I am definitely replacing, just not sure if I should head over to my local hardware store instead. If so, what material for the bolt should I use? I am keeping my stock manifold. Going to put it in a harbor freight path to get it clean, and then respray it with some Ford Corporate Blue.

Thank you

 

[m_m70]

When using the Fel-pro, make sure you get the 1250S-3 gaskets and not the regular 1250. Simple GOOGLE search will answer any questions you have on why

I run studs instead of bolts. Not saying that's any better or worse, just what I run. I would find grade 8 bolts if you're replacing. Not that they are heavily torqued but they will hold up. Most folks I know just clean up the originals. Are your originals toast??

 

[NJBronk]

Get the Permatex in the can with a trigger - makes it so much easier to lay the bead on the front and back than trying to squeeze a tube...

 

[Broncobowsher]

No, ARP bolts are not worth the expense for a stock cast iron intake. There is so little stress on the intake you could run the lowest grade bolt that doesn't fall apart in your hand and it would be fine.

 

[m_m70]

Get the Permatex in the can with a trigger - makes it so much easier to lay the bead on the front and back than trying to squeeze a tube...

Totally agree!

 

[tonytony9]

When using the Fel-pro, make sure you get the 1250S-3 gaskets and not the regular 1250. Simple GOOGLE search will answer any questions you have on why

I run studs instead of bolts. Not saying that's any better or worse, just what I run. I would find grade 8 bolts if you're replacing. Not that they are heavily torqued but they will hold up. Most folks I know just clean up the originals. Are your originals toast??

So, I bought this at AutoZone yesterday. No SKU or part number anywhere so im not sure which Fel-Pro gasket it is. Feels heavy and stiff, maybe has the steel core? Going to find out if they have in stock the exact part you are referring to.

This gasket even look correct?

 

[NJBronk]

I'm not sure those raised lips are going to work... I got mine on Amazon: https://www.amazon.com/gp/product/B001EQK84C/?tag=classicbroncos-20

 

[tonytony9]

I'm not sure those raised lips are going to work... I got mine on Amazon: https://www.amazon.com/gp/product/B001EQK84C/?tag=classicbroncos-20

Yeah agreed, I returned and have the 1250S-3 coming into this afternoon.

 

[Oldtimer]

The gasket you returned is 90103-1.

Biggest differences between them are:

1. Opening for crossover passage, I think it is for exhaust to preheat intake and for EGR valve
2. Water jacket passages at ends are larger on the 1250 S-3. Check it against head and intake for possible leaking to intake bolt holes.

 

[tonytony9]

The gasket you returned is 90103-1.

Biggest differences between them are:

1. Opening for crossover passage, I think it is for exhaust to preheat intake and for EGR valve
2. Water jacket passages at ends are larger on the 1250 S-3. Check it against head and intake for possible leaking to intake bolt holes.

View attachment 922672

Thank you that was a helpful visual!

I am going to run over to Harbor Freight to grab the bolts this morning. Cut the heads off my old ones to use as studs to drop the manifold on for positioning. Does anyone know the length/size bolt I need?

 

[NGABronco]

I like the 90103-1 ???

 

[tonytony9]

I like the 90103-1 ???

haha already changed up whoops

 

[tonytony9]

The gasket you returned is 90103-1.

Biggest differences between them are:

1. Opening for crossover passage, I think it is for exhaust to preheat intake and for EGR valve
2. Water jacket passages at ends are larger on the 1250 S-3. Check it against head and intake for possible leaking to intake bolt holes.

View attachment 922672

I like the 90103-1 ???

I'm not sure those raised lips are going to work... I got mine on Amazon: https://www.amazon.com/gp/product/B001EQK84C/?tag=classicbroncos-20

I bought myself a machine wash tub and some degreaser solution from Harbor Freight. Going to drop the intake manifold and air cleaner in the tub to clean it out (original both). Any brushes I should avoid using?

 

[gnpenning]

Tony, you said a parts cleaning tub. If it's just the tub with out a pump this will work for you.


Performance Tool W197C Parts... https://www.amazon.com/dp/B000N37BEC/?tag=classicbroncos-20.

If you bought one with a pump this is a nice one to have.

Oriflo With Hose (OR101H)... https://www.amazon.com/dp/B00U7LUVSI/?tag=classicbroncos-20


I bought both of these this past winter for replacements and so far they have held up well. I like a little point to the end of the bristles for getting into tight spots.

The type of cleaner you are using may make a difference in what you should use. I'm using Stoddard solvent.

Good to see you are slowing down some before spending money.

 

[1969]

I always take parts to the $1 pressure wash with some degreaser and a brush. I’m sure they love me.

 

[gr8scott]

Fel-Pro Intake Manifold Gaskets MS 90103-1 have a steel core. To verify, use a magnet and see if it sticks.

NVM, I see you returned them.

Fel-Pro MS 90103-1 Fel-Pro Intake Manifold Gaskets | Summit Racing

Free Shipping - Fel-Pro Intake Manifold Gaskets with qualifying orders of $109. Shop Intake Manifold Gaskets at Summit Racing.

www.summitracing.com

 

[tonytony9]

Tony, you said a parts cleaning tub. If it's just the tub with out a pump this will work for you.


Performance Tool W197C Parts... https://www.amazon.com/dp/B000N37BEC/?tag=classicbroncos-20.

If you bought one with a pump this is a nice one to have.

Oriflo With Hose (OR101H)... https://www.amazon.com/dp/B00U7LUVSI/?tag=classicbroncos-20


I bought both of these this past winter for replacements and so far they have held up well. I like a little point to the end of the bristles for getting into tight spots.

The type of cleaner you are using may make a difference in what you should use. I'm using Stoddard solvent.

Good to see you are slowing down some before spending money.

I got the tub with the pump/hose. The Oriflo tool looks great, thanks!

 

[tonytony9]

Fel-Pro Intake Manifold Gaskets MS 90103-1 have a steel core. To verify, use a magnet and see if it sticks.

NVM, I see you returned them.

Fel-Pro MS 90103-1 Fel-Pro Intake Manifold Gaskets | Summit Racing

Free Shipping - Fel-Pro Intake Manifold Gaskets with qualifying orders of $109. Shop Intake Manifold Gaskets at Summit Racing.

www.summitracing.com

Great tip either way

 

[tonytony9]

Tony, you said a parts cleaning tub. If it's just the tub with out a pump this will work for you.


Performance Tool W197C Parts... https://www.amazon.com/dp/B000N37BEC/?tag=classicbroncos-20.

If you bought one with a pump this is a nice one to have.

Oriflo With Hose (OR101H)... https://www.amazon.com/dp/B00U7LUVSI/?tag=classicbroncos-20


I bought both of these this past winter for replacements and so far they have held up well. I like a little point to the end of the bristles for getting into tight spots.

The type of cleaner you are using may make a difference in what you should use. I'm using Stoddard solvent.

Good to see you are slowing down some before spending money.

Made a good amount of progress since this post, but yes, I have been taking it batch by batch. So far, she is running better than I could ask for. Well, my garage floor would adamantly disagree haha.

 

[tonytony9]

Fel-Pro Intake Manifold Gaskets MS 90103-1 have a steel core. To verify, use a magnet and see if it sticks.

NVM, I see you returned them.

Fel-Pro MS 90103-1 Fel-Pro Intake Manifold Gaskets | Summit Racing

Free Shipping - Fel-Pro Intake Manifold Gaskets with qualifying orders of $109. Shop Intake Manifold Gaskets at Summit Racing.

www.summitracing.com

I actually have to redo the intaje manifold. Leaking from the front and back again pretty bad. Will need to redo the RTV Ultra Black bead I put down.

If the gasket gets ruined, is the MS 90103-1 the wrong gasket to use v the 1250 S-3? The 90103-1 I can get at my auto parts store same day.