Big block running hot. Can’t figure out the issue

[Slooptin]

Ok, so I managed to get some time to work on the truck this weekend. New radiator, hoses, cap, and thermostat all in and the system burped. I noticed during the burping process though, that the t stat (180 degrees) doesn't open until the gauge reads 240ish so I'm thinking maybe my sensor is crap. Have a new one on the way as well as one for the intake just to compare. IR gun showed the exterior of the heads was around 220 degrees too and the upper rad hose never got hard this time so I'm thinking maybe a plugged radiator or bad cap wasn't letting it relieve pressure. I'll report back once I've got the new sensor in just in case.

 

[Slooptin]

Figured I'd close the chapter on this. Swapped in new temp sensors (one in the head and one in the intake) and everything's running good now. Sits at ~170-180 degrees with the head sensor and about 10-20 degrees hotter if I connect the wire to the intake sensor. Still no idea how or why the upper intake hose got hard the first couple of times but everything's good now, just need to fine tune the carb

 

[DoubleDingo]

Glad you got it fixed and reported back that you fixed it

 

[Slooptin]

Well, so I thought. Drove it to work yesterday to get it out on the highway for a bit and really give it the old Italian tune up. Got back and was messing with some carb adjustments when I noticed some white smoke coming from the exhaust and my upper rad hose was hard again. At this point, I'm just going to do head gaskets and call it a day.

 

[75BEASTK20]

I'd start with checking rad first for circulation or any kind of blockage. Then check thermostat to make sure it opens. Even NEW thermostats are DOA on arrival.

 

[AuroraGirl]

The reverse rotation/standard rotation pump thing is just the impeller mirrored as the serpentine setup spins the pump the opposite direction that a v belt setup (or flat belt setup that uses the grooved side of the belt) does.

The flow path to and from the radiator remains the same for either pump setup.

Photo is of two ford pumps (their open design makes it a good visual) one std and one rev rotation:

You must be registered for see images attach

You must be registered for see images attach

 

[JBswth]

Cruise is around 14-15. Idle is 11-12. It gets hot whether I drive it around or not. Not sure on total timing. Vac advance is hooked up to manifold vac

Not sure, but it was running right under 210 before I took it apart about 10 months ago

Are you sure that your vacuum advance is supposed to be using manifold vacuum and not ported vacuum?

J. B.