Heater Hose Routing 69 Z28

[COPOZ/28]

On 1969 Z28's, does this photo show the correct orientation of the heater hoses in the hose support clamp attached to the alternator bracket?  Specifically:


1.  Should the 3/4" hose from the water pump be positioned in the hose support clamp in front (i.e.: closer to the alternator) of the 5/8" hose to the intake manifold?  I believe that is the correct routing through the hose support clamp.


2.  Should the hose support clamp on the alternator bracket be bent downward a bit to give some clearance to the AIR pump hose as it traverses from the driver's side AIR pump check valve to the diverter valve on the passenger side?


I have been unable to locate a clear graphic of this issue in the '69 AIM that confirms the correct hose/support bracket condition.


I've found that the AIR pump hose will be deflected rearward, into the ZL2 air cleaner (not shown),[size=78%] [/size]by interfering with the 5/8" heater hose if the heater hose support clamp on the alternator is NOT bent downward.  But, if the support clamp is not supposed to be bent down, then the AIR pump hose assumes a more "natural" routing if it is positioned between the two heater hoses, rather than behind both hoses.


I would appreciate any thoughts on this.  Thanks.

[william]

They didn't always use the clamp.

[COPOZ/28]

Good magazine road test photos.  It's interesting that the August '69 photo (without the heater hose clamp) shows a plastic strap securing the alternator wiring to the 3/4" heater hose, while the January '69 photo (with the heater hose clamp) does not show this plastic strap.  This is just another indication of my years of experience working in the automotive industry that proves anything can and likely has happened in a vehicle assembly plant.


Although neither photo is definitive in the routing of the AIR pump hose, it leaves the door open to the possibility that it is routed between the two heater hose, rather than behind (rearward) both hoses.  Any chance there is a photo in your collection of such '69 Z28 road test photos that would allow one to draw a conclusion for the AIR pump hose routing?

[David K]

Aren't the heater hoses routed the same for all 69 small blocks with A.I.R.?

[GMAD_Van Nuys]

Prior CRG discussion on heater hoses:

http://www.camaros.org/forum/index.php?topic=16558.45

[william]

Any chance there is a photo in your collection of such '69 Z28 road test photos that would allow one to draw a conclusion for the AIR pump hose routing?

There is a vintage engine bay photo in JM's '69 Camaro book [pg. 120] that shows the ty-rap on a Nov '68 built Z/28. The AIR hose is routed over both heater and upper radiator hoses.

[COPOZ/28]

Many thanks to GMAD_Van Nuys for posting the link to the earlier "heater hose clamp/alternator bracket" post -- it was quite informative.


It would appear the AIR pump hose is supposed to route between the two heater hoses.  On the other hand, the use of the alternator bracket mounted heater hose clamp beyond the April '69 timeframe remains an open question for discussion.  I've owned my Norwood 05E, offline ~6/2/69, '69 Z so long (am 2nd owner since Nov '79), I simply can no longer recall if that heater hose clamp was on the car when I acquired it or if I added it, thinking it should be there on every '69 Z28 because I saw it in an underhood photo.  Based on the info in the earlier post, I would have to guess it is more likely that I added that clamp myself at one time.


Thanks to everyone who chimed in  -- much appreciated!