[moneypit]

I'm putting a new heater core in my 74 T/A, while I'm at it I thought I'd try all the tips on lowering the engine temp that I've read on the forum lately. I have done the waterpump impeller deal, 160 degree stat, good 4 row radiator, and flushed the block. I want to put a heater hose nipple on the drivers side head and T it from both heads to the heater core. Does anyone offer a nipple that has a 90 degree angle? My car has HEI and if I use the straight nipple I won't have enough room without kinking the hose! Any suggestions welcome.

Thanks, MP

[Robert Williams]

The 301" Pontiac engine has the 90 degree heater nipple, GM part number #1609997.

[moneypit]

Thanks Robert. Do you know if the diameter is the same ?

Thanks, MP

[67 455 Bird ragtop]

Yes - the diameter is the same. I used them in my #62 heads. Worked fine. You can see how I ran the lines in my photos by clicking the link in my sig. I got mine from Year One. They were $40 each.

[Robert Williams]

Originally Posted by moneypit

Thanks Robert. Do you know if the diameter is the same ?

Thanks, MP

Yes, it is....

[moneypit]

Thanks guys, I'll order one up from the local GM dealer.

[67 455 Bird ragtop]

Moneypit - Try GMPARTSDIECT.COM. They are usually much cheaper than the dealer. I get stuff for my 97 GTP from them.

[gto1967]

What the best source for a tee?

[67 455 Bird ragtop]

The alphabet .... .. Just kidding. Which tee are you looking for. Probably a dumb question. But I'm good at those.

[gto1967]

a tee to plumb two heater hose nipples from each head to the heater core.
thanks,mark

[67 455 Bird ragtop]

You could probably get one at a parts store. Or maybe check Home Depot or Lowe's or even Russel /Earl's for the parts to make one. Since Pontiacs usually had only one head plumbed there may not be a "factory" piece to use. I have several parts catalogs on my computer at home. I'll take a look for something you could use. If memory is correct these are 1/2" hoses?? Let me know if I'm wrong. I'll also try and reember to check when I get home.

[gto1967]

I believe the nipple on the head takes a 5/8" heater hose.

[Robert Williams]

Originally Posted by 67 455 Bird ragtop

You could probably get one at a parts store. Or maybe check Home Depot or Lowe's or even Russel /Earl's for the parts to make one. Since Pontiacs usually had only one head plumbed there may not be a "factory" piece to use. I have several parts catalogs on my computer at home. I'll take a look for something you could use. If memory is correct these are 1/2" hoses?? Let me know if I'm wrong. I'll also try and reember to check when I get home.

Nipple on cyl head to the heater core use 5/8" hose, heater core to timing cover (return line) use 3/4" hose.