Heater hose routing

canadian

sy in progress
Can someone post some pics of how the heater hoses are routed? I've switched to a Non-A/C box and plugged the lines at the manifold and at the radiator. Going to be putting in a non-A/C heater core and need to see how the stock lines run.

Thanks
 

SY2932

Administrator
Re: Heater hose routing

From a distance:
dsc_0014.sized.jpg


Close up:
IMG_1881.sized.jpg
 

Don W.

Stab it and steer it
Re: Heater hose routing

Based on your pics the stock rad connection is unavailable because of the cobra elbow. I did the A/C delete and kept the A/C heater core like you show. Hot water from engine is in stock location off the manifold. For return I drilled and tapped a hole in the suction side of the water pump at the top, screwed in a fitting and ran the hose to the core. Looks fine and works great.

LMK if you want a pic.
 

canadian

sy in progress
Re: Heater hose routing

Thanks Mike. I'm going with the non-A/C heater core and have the generic intake manifold hose. I figured it was routed under the I/C, but was worried about the downpipe heat melting the rubber. I guess if there's a constant flow of coolant through it, that should be safe. Going to install a K&N directly on the turbo, so the line coming out of the radiator may be an issue.
 

canadian

sy in progress
Re: Heater hose routing

Based on your pics the stock rad connection is unavailable because of the cobra elbow. I did the A/C delete and kept the A/C heater core like you show. Hot water from engine is in stock location off the manifold. For return I drilled and tapped a hole in the suction side of the water pump at the top, screwed in a fitting and ran the hose to the core. Looks fine and works great.

LMK if you want a pic.

I'm assuming you just capped the line coming out of the radiator? That's how I have mine now, but I noticed that the cap is getting some dry rot. I've heard of others who have done the same thing have the cap explode over time and blow coolant all over the place. That is my main concern with capping the radiator side.
 

pearl91chevy

Donating Member
Re: Heater hose routing

Sy2932 i really like the look of your motor with the whole pass side pulley system gone! I also did ac delete but didn't think about doin it that way. Do you not have a tensioner anymore?
 

Don W.

Stab it and steer it
Re: Heater hose routing

I'm assuming you just capped the line coming out of the radiator? That's how I have mine now, but I noticed that the cap is getting some dry rot. I've heard of others who have done the same thing have the cap explode over time and blow coolant all over the place. That is my main concern with capping the radiator side.

Correct, it's capped. Don't know about dry rot. In my truck, as it seems yours, doing a real inspection on that cap requires removal of the cobra elbow. Where do you have your return hose routed now?

I have RPM's A/C delete kit which puts the tensioner roughly where the compressor was. I liked that because it put more belt on the water pump pulley and provides for a tensioner. Down side, which Mike may have fixed, was that with the belt provided the tensioner goes over center. I had to get a shorter belt and modify the tensioner mounting a bit.
 

canadian

sy in progress
Re: Heater hose routing

Correct, it's capped. Don't know about dry rot. In my truck, as it seems yours, doing a real inspection on that cap requires removal of the cobra elbow. Where do you have your return hose routed now?

I don't have any hoses at the moment. I removed the heater core a long time ago and just capped both the manifold and the radiator. The only reason I took a good look at the cap is I remember someone saying how theirs exploded and fluid went everywhere.

I'm doing my best to avoid capping it since I'm going to be running a K&N directly on the turbo which will end right in front of the cap. If it did explode, the turbo would end up sucking in a lot of coolant.

So, I figured I'd put the heater core back in and run the hoses again. I just couldn't remember how they went. I thought there was a special hose for the radiator end so that it would do an "S" bend around the orange tube in addition to the intent in the tube.

Just need to figure out how to route it with the filter on there as well. Every time I tried searching for heater hoses for Non-A/C S10 on the parts store sites, nothing would come up. It's like they never sold a Non-A/C 4.3 S-truck.
 

canadian

sy in progress
Re: Heater hose routing

Picked up the new core today. Looks like a 3/4" and 5/8" line. Which is which? I'm assuming you can use 3/4" for both and clamp down the smaller line rather than using 5/8" hose?
 
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