Heater Core Hose Routing
 

I just swapped my 2 core for a 4 core radiator. While routing the lines i noticed my new radiator has a pipe for a heater core line. My truck is plumbed like the manual transmission setup in the picture. It is a 3 on the Tree Manual Transmission.

Can I plug the waterpump and use the Automatic V8 setup? Or do I need to plug the radiator pipe and leave the routing as it is now. It would look cleaner if I plugged the waterpump. My assumption is it would work either way but it wouldn't be the first time I was wrong!

Re: Heater Core Hose Routing
 

You can use either return circuit. Going back to the pump helps the engine warm up quicker IIRC.

Re: Heater Core Hose Routing
 

Ya i'm trying to fix a getting hot issue. On our hot days my engine can get up to 215 at idle. The only thing I get to figure out now is to find a 4 core 2wd radiator shroud =p. I've got this checker special single electric fan kicking around but am hesitating on installing it. Thx for the help.

Re: Heater Core Hose Routing
 

Shrouds, no doubt, do help with idle temps. Sometimes, a quicker fix is to (1) replace fan with 1 or more extra blades as compared to your present fan, or(2)changing to a solid mount fan if your present one is hydraulically/thermally controlled, or(3)both 1 & 2 combined. If blades are too far from radiator, use a spacer to bring them to proper proximity.

May be noisier, but will at least buy some time until you find a suitable shroud, is very quick & simple to change, and should not be wasted effort/expense(exc. maybe for the spacer) for when you do find the shroud. Also, keep in mind that in today's operations, 215 at idle is not considered 'bad', but should cool down quickly as you speed up engine RPM.
HTH,
Sam

Re: Heater Core Hose Routing
 

The swap went well. Had to drill out the base radiator support rivets. The replacement 4 core went in easy. I flushed the system and drained the water. Then 2 gallons of 50/50 to finish it off.

While i'm moving the truck runs really cool. After a good freeway drive at Idle it got to 185-190. Which is a significant improvement. I'm on the hunt for a local radiator shroud now. A few more phone calls, then ill just post a WTB Ad somewhere and see if I can get a good deal.