Dan Sarandrea (Phila)
Waitin' On Parts...
Running Too Warm----Results Added 11/4/13
Oh Noooooo, not another running too warm/hot thread!:fart::nod:
During final prep I tested the cooling system with a pressure tester, and I had to replace the original-to-the-car water pump because it was leaking, probably due to sitting for close to six years. I ordered the pump from one of our regular vendors, but like a dope, I forgot to pay close attention to the impeller to body clearance and installed it without checking.
Have taken my car out about seven times since it got back on the road. The car operates at normal temps (190-200°) at cruise, but when idling or in slow traffic, temps gradually creep up to 225-230°, but will come down once moving at cruise again.
After eliminating other causes for this behavior (bleeding, thermostat, etc), as much as I did not want to, I had to remove the pump and check the clearance.
As I was removing the alt and the access panel in order to get to the pump, I noticed a "leak trail" from the pump body. The trail lead to the plug installed in the pump body that blocks off an unused heater return tap. The sealant used was not cured properly, allowing the very slow leak.
Once the pump was removed from the car, I checked the clearance as best I could and from what I could tell, it was between .050 and .055, which is too much!!!
For comparison, I checked the clearance on the OEM pump that I removed because it was leaking, and that seemed to be in the mid-.030s range.
I disassembled both the old and new pumps (removed the impeller and pulley assembly from the pump body) and started mixing and matching to see what combination of pump body, impeller/pulley, and gasket gets me the tightest fit.
My proposed course of action is to use the original pump housing with the new impeller/pulley assy. I plan to take it to my buddy who owns a machine shop, where I can bead blast the pump body to remove the internal scale, and then ask him to mill the right amount of material off the face of the pump body to get the clearance to the tight end of the spec range.
Will post pix tomorrow nite.
Oh Noooooo, not another running too warm/hot thread!:fart::nod:
During final prep I tested the cooling system with a pressure tester, and I had to replace the original-to-the-car water pump because it was leaking, probably due to sitting for close to six years. I ordered the pump from one of our regular vendors, but like a dope, I forgot to pay close attention to the impeller to body clearance and installed it without checking.
Have taken my car out about seven times since it got back on the road. The car operates at normal temps (190-200°) at cruise, but when idling or in slow traffic, temps gradually creep up to 225-230°, but will come down once moving at cruise again.
After eliminating other causes for this behavior (bleeding, thermostat, etc), as much as I did not want to, I had to remove the pump and check the clearance.
As I was removing the alt and the access panel in order to get to the pump, I noticed a "leak trail" from the pump body. The trail lead to the plug installed in the pump body that blocks off an unused heater return tap. The sealant used was not cured properly, allowing the very slow leak.
Once the pump was removed from the car, I checked the clearance as best I could and from what I could tell, it was between .050 and .055, which is too much!!!
For comparison, I checked the clearance on the OEM pump that I removed because it was leaking, and that seemed to be in the mid-.030s range.
I disassembled both the old and new pumps (removed the impeller and pulley assembly from the pump body) and started mixing and matching to see what combination of pump body, impeller/pulley, and gasket gets me the tightest fit.
My proposed course of action is to use the original pump housing with the new impeller/pulley assy. I plan to take it to my buddy who owns a machine shop, where I can bead blast the pump body to remove the internal scale, and then ask him to mill the right amount of material off the face of the pump body to get the clearance to the tight end of the spec range.
Will post pix tomorrow nite.
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