Pontiac 400 heater hose question

[rhs856]

Can anyone tell me where the other end of the heater hose (labeled in picture) goes on the engine? I'm having a difficult time finding a good photo of the back of the engine without the air cleaner on.

[moparmagiclives]

I want to say my 455 went to a nipple in the coolant passage on the intake. ? Guess its been to long.

[espo]

Pontiac used a line that ran from the heater to the water jacket, usually on the rear of the intake manifold. This was the way that I remember seeing it on all Pontiac V8s from 1955 thru the '70s.

[wagonmaster]

IIRC, it went to the block next to the dist. I don't remember having to take it off when I changed intakes on my std 400 in my 70 GTO. Didn't have to yank my dist either. But may very from one model/year to the next. I have asked pontiac questions on the performance years forums and they have been very helpful.

Tim

Edited March 4, 2012 by wagonmaster

[rv1963]

I owned both a 1967 and 68 and by brother had a 69 bird the rear heater hose goes from the heater core in the fire wall to the passenger rear cyclinder head just behind and a little below the rear intake runner there was a nipple on the head, the only coolent passage on the intake manifold was at the front for the upper rad hose, the other heater hose goes from the water pump to the firewall. I hope this helps.

Edited March 4, 2012 by rv1963

[Qwit Pushin]

Found this reference shot which indicates it's actually routed to the inside rear of the right cylinder head:

[rv1963]

Perfect picture the hose rather short maybe about a foot long.

[rhs856]

Thanks, guys! I stopped back here today after I found a photo of a (what looked like) badly burned engine that showed the same thing. The photo posted above is exactly what I needed.