heater hose direction

bluecoupe30!

bluecoupe30!

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Trying to replace the in/out water hoses to my heater. Been off for 2 years in my "heater delete" experiment) I thought I had photos of "before" but seem to have every other angle but what I need. Have looked at blue book and it looks like either hose can connect to back of cylinder head according to photos page 64-21/1. So, I wonder if it really matters? Can some of you tell me what your top hose connects to? (BTW, I have a '72 carbed car). Thanks, Mike
 
Perhaps I can clarify, of the 2 heater pipes coming through the firewall, where does the hose attached to the top pipe, go? In my case I forget if it goes to the back of the cylinder head, or under my carb manifold. Anyone?
 
1CEA9443-F6D0-4E3F-B057-E4804C468246.jpeg
bluecoupe30! said:
Perhaps I can clarify, of the 2 heater pipes coming through the firewall, where does the hose attached to the top pipe, go? In my case I forget if it goes to the back of the cylinder head, or under my carb manifold. Anyone?
Click to expand...

top goes to carbs manifold, bottom goes to cyl head,

IMHO the curve of the hoses says it very clearly
 
Thank you Steve and deQuincy. This is exactly what I have come across in manuals and photos of engine bays. I wonder if it even matters. Real OEM shows part numbers but not where each pipe attaches after it leaves heater outlet or inlet. It will be interesting to hear from others as well. Thanks. Mike
 
bluecoupe30! said:
Thank you Steve and deQuincy. This is exactly what I have come across in manuals and photos of engine bays. I wonder if it even matters. Real OEM shows part numbers but not where each pipe attaches after it leaves heater outlet or inlet. It will be interesting to hear from others as well. Thanks. Mike
Click to expand...

ye s, we need to solve this mistery
 
I stand corrected! I'll have to check what I did on my bypass plumbing, it probably doesn't matter.
 
Markos said:
No carbs on this CSI motor but the pic confirms @deQuincey’s assertion.


View attachment 58123
Click to expand...
you do realize that the return hose is different for CSi and CS

heater hose inlet - 64211354603 (same both models)
64211354603.jpg



heater hose return (carbs) - 64211361180 ... this is a double bend hose with both ends parallel
64211361180.jpg


heater hose return (injection) - 64211354041 ... this is a single bend L shaped hose
64211354041.jpg
 
rsporsche said:
you do realize that the return hose is different for CSi and CS
Click to expand...

I’m well aware but it is good that you shared . The CSI and the later fuel injected cars have a metal coolant pipe
that spans the length of the block:

Like this (@sfdon). I kept my pipe...

0E3DBE0C-6BB6-4A57-A37C-1E40CB62D039.jpeg
 
rsporsche said:
you do realize that the return hose is different for CSi and CS

heater hose inlet - 64211354603 (same both models)
64211354603.jpg



heater hose return (carbs) - 64211361180 ... this is a double bend hose with both ends parallel
64211361180.jpg


heater hose return (injection) - 64211354041 ... this is a single bend L shaped hose
64211354041.jpg
Click to expand...
Sure do. I might add that if you act now, BavAuto has the "injection" ...041 hose on SALE for $8.
 
i've got the 041 and the 180 hose so i can figure out which will work better for my b34 engine ... i presume that the 041 hose will be what i need.
 
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