Heater hose routing into back of intake 351W

[guidoverduci]

My heater hose has a T fitting that routes to another T fitting which goes into 2 rear ports in the intake manifold. Is this just for extra cooling measures? It’s a 351W. Is it necessary? I’m looking to clean up the engine bay. Thanks for any info!

 

[DirtDonk]

Since it’s such an unusual sounding contraption, maybe pictures would be called for.
I know I’d like to see it.

There aren’t often cooling tubes to the back of the manifold, and most manifolds don’t even include them. But some did and some are custom added by the installer.
The ones I’m thinking of were indeed for 351 Windsor cooling because it was thought, and I think mostly correctly, that heat buildup in the rear cylinders was due to steam pockets in the water jacket.
Did seem to help in some racing circles at least. Not sure how often it helped on the street when there might’ve been other cooling problems as well.

 

[guidoverduci]

Interesting. I didn’t realize this was uncommon. Here’s some pics..

 

[Broncobowsher]

The cylinder head water partial bypass. Someone once thought they could get better cooling by bypassing water around the cylinder heads. For a couple of decades the sheep followed this mystery advise.

Scrap it. Go to a normal heater hose package.

 

[Timmy390]

Bet that's an E-Brock RPM intake? As I recall there was a big phase of everyone claiming 351W's trapped air in the "dead" areas of the intake/head and caused overheating issues. That intake came with allen head plugs so you could plumb it like yours is to allow air to burp out of the system. Never had any issues myself and 99.9% of overheating issue are something other than trapped air.

As mentioned.....clean it up/scrap it......Just more expense in hoses/fittings and more areas to leak.......JMO

Tim

 

[Quick & Dirty]

The Performer EGR had the rear crossover built in.

 

[guidoverduci]

Thanks everyone! Yep, performer RPM. I’ll scrap it. Appreciate it.

 

[DirtDonk]

Don't throw away the parts right away though. You know... Just in case.

 

[Broncobowsher]

The Performer EGR had the rear crossover built in.

There was a time in the early 80s where Ford did use the rear coolant passages. It was used for an EGR cooler. So not so hot exhaust would be fed into the engine.

 

[sanndmann3]

351 Cooling Tips

Tech article by TOFIC After reading about all the cooling problems that you can have with the 351 I did some research on how to minimize the problems I could have. After some reading I discovered that some intakes did not have the rear cooling ports open for use of the cooling system. Checked...

classicbroncos.com

well, dang. I guess I will be removing that from my 351 this winter...

 

[Madgyver]

i tied it into the front port many years ago. ran it that way since 99 til I pulled the motor out last month.