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Which one is heater inlet hose?

fuzzbutt

fuzzbutt

New member
Hi, trying to install a flush kit and they say to cut the heater inlet hose. Both hoses run form firewall and both seem to go into the water pump but they don't want me cutting the water pump hose, just the heater INLET hose.

Can't find a schematic for that. Any help please?

Thanks!

Steve
 


it really wont matter which heater hose you tap into. the flush will still go everywhere.

but im thinking the top hose on the fire wall is the one pumping into the heater core, the lower one is its return. 50/50 shot there lol
 
Hmm, just trying to do what the instructions say to do. You're probably right, though. Water flows all the way through so what's the difference? But just in case there's a one way valve or something crazy, I do need to ascertain the heater inlet hose. they both look like they run into the water pump but I'm sure one just goes to the top water jacket. Not sure, never did this one before..

Any absolute, positively sure diagrams or anything on this?

Thanks though.
 
Ha! I just grabbed the top one coming out of the firewall and spliced it. Seems to work with the flush, probably as Scottiedogg said.

However, I have worse problems than that with this pig. Only 118k of easy miles (with synthetic oil changes every 6k) and main seal is leaking and the head gasket blew. Now the starter won't crank probably due to water in the cylinder. Jeez, what next- locusts???

:(
 
I getting ready to do this, this weekend, if the tropical storm doesn't come through :-( . I also, would like to now which of the heater hoses is the inlet hose but I have read it is the top hose.
 


First way to figure out which is "in" and "out" is you can turn the heater on, then feel which hose is hot/not as hot , the hotter one is "in", the cooler one is "out", another way: the larger hose is "in", smaller hose is "out", hot water expands, as it cools going though the H.E., it contracts.
 
there is no flow valve to the heater core. it flows coolant year round. so both hoses get hot all the time.

this idea does work tho, start with a cold engine, fire it up, hold both hoses, witch ever one gets hot first is the one that flows into the core.

or take both hoses off the fire wall, and fire the car up, you see the hose push coolant.
 
QUICKSILVER462 said:
First way to figure out which is "in" and "out" is you can turn the heater on, then feel which hose is hot/not as hot , the hotter one is "in", the cooler one is "out", another way: the larger hose is "in", smaller hose is "out", hot water expands, as it cools going though the H.E., it contracts.
Click to expand...

This is the one I'm going with!
Thanks fellas!
 
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