SERIOUS OVER HEATING PROBLEM

[Bob Watson]

thanks for all your help---

--problem was a bad themostate...

 

 

 

 

 

 

 

 

 

 

 

 

Edited June 18, 2019 by Bob Watson

[Los_Control]

I doubt the water pump is not putting out enough water ... though it may need to be replaced.

I would bet, pull the water pump and you will find the water distribution tube behind it is clogged.

 

This will stop the flow of water through the block, can be replaced without to much blood loss.

I would also pull the welch plugs and clean the casting sand out of the block while working on it.

[keithb7]

When you say he’s done everything we can only guess he’s done everything we’d do. 

 

Pulled rad and have it serviced?

Checked rad flow?

Verified coolant temperature drop from top rad tank to output at bottom?

Thermostat fully opening? Test with no thermostat? Pressurize rad cap to test that cooling system is holding presaure? Water distribution tube in tact and free flowing? Block and head coolant passages clean of rust, scale and debris? 

 

That’s a good start. 

 

 

 

Edited June 16, 2019 by keithb7

[Los_Control]

 

What I would look at. Just to add to it, when I looked at mine.

I had so much calcium build up, I could not run a fence wire through the tube.

With some effort, I did get my tube cleared, replacing it may be a better option.

Edited June 16, 2019 by Los_Control

[JerseyHarold]

The heat riser valve on the manifold may be stuck shut  That would cause hot running as well.

[John Reddie]

1 hour ago, keithb7 said:

When you say he’s done everything we can only guess he’s done everything we’d do. 

 

Pulled rad and have it serviced?

Checked rad flow?

Verified coolant temperature drop from top rad tank to output at bottom?

Thermostat fully opening? Test with no thermostat? Pressurize rad cap to test that cooling system is holding presaure? Water distribution tube in tact and free flowing? Block and head coolant passages clean of rust, scale and debris? 

 

That’s a good start. 

 

 

 

I second this advice. especially the radiator flow test and thermostat functioning correctly. If this were my car, these two things would be first on the list and verifying that the fan belt is tight also.

 Good luck to you.

John R