Originally Posted By: mechanicx
Off topic but since this thread's question has already been answered, something I always wondered about is how this vin M, J and others has an extra external T-stat/waterpump bypass pipe so near the heater inlet pipe and if this would reduce heater inlet flow? Seems like it could. Also since both the heater outlet and bypass are plumb to the same T-fitting at the water pump inlet that the bypass is robbing the heater oulet's suction. Maybe not because what happens then when the T-stat opens and the waterpump is drawing from the radiator? I'm not sure how it works out.
I don't know that it matters much. The heaters work fine on both my GM's with 3100 engines.
Originally Posted By: benjamming
I need the part number for the metal coolant hose shown below. The part has R 61140 on the bracket. It is on a 1994 Pontiac Grand Am 3.1L. I have the part number for the fitting with plastic not-quick-disconnect that threads into the lower intake manifold at the thermostat housing & connects to a heater hose.
Also, is there an online site where I can look up part numbers from an exploded parts diagram? That would be really helpful a lot of times (like now). I can do this rather easily for a Honda from many online dealers but I'm not aware of this possiblity with Pontiac (or any GM for that matter).
Thanks.
I don't have any easy way of looking up that pipe, but I'm familiar with it. My '94 Corsica has the same setup. The connector can be bought at Autozone and the like for about $10. Don't know about the pipe- might be dealer or junkyard only.
I got tired of dealing with that connector on my Corsica, and replaced it with a brass fitting: 1/2" NPT X 5/8" compression fitting. It's worked great for years, and will just unbolt when I need to remove the pipe.
On my own vehicle, if that pipe ever rusted through or something, I'd be tempted to just put a 1/2" NPT X 5/8" hose nipple fitting into the intake, then run silicon heater hose to the heater core.