Ben_Copeland
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| posted on 6/7/13 at 09:33 PM |
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quote:
Originally posted by spaximus
this is probably a silly suggestion, but have you got the belts correctly installed. I did once see a car where they guy had done away with the
tensioners, as it looked cool, but had then made the water pump run the wrong way.
All standard and timed up correctly.
Ben
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davidimurray
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| posted on 6/7/13 at 09:36 PM |
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I had similar problems with my pinto when I first plumbed it up. Mine would over heat and the fan would not kick in. Checked the thermostat out of the
car and it worked fine. My system was basically plumbed as a loop with the expansion tank tee'd in.
What I found was that the system was basically running against the deadhead that was formed by the thermostat. The water in the pipes and radiator
were slowly heating up, but there was no flow around the system and hence the thermostat never got hot enough to open, meanwhile the water in the
block just sat there getting hot.
My solution was that there was a small outlet on the thermostat elbow. I added an 8mm bypass line from the thermostat to the top of the expansion
tank, this gives a constant flow of water over the thermostat and makes sure it opens.
Before making this mod my car wouldn't idle without overheating, now it will sit happily being revved away without any problem.
Can you try running without the thermostat just as a test. That will at least tell you if it is an issue with the thermostat.
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Ben_Copeland
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| posted on 6/7/13 at 09:47 PM |
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quote:
Originally posted by davidimurray
I had similar problems with my pinto when I first plumbed it up. Mine would over heat and the fan would not kick in. Checked the thermostat out of the
car and it worked fine. My system was basically plumbed as a loop with the expansion tank tee'd in.
What I found was that the system was basically running against the deadhead that was formed by the thermostat. The water in the pipes and radiator
were slowly heating up, but there was no flow around the system and hence the thermostat never got hot enough to open, meanwhile the water in the
block just sat there getting hot.
My solution was that there was a small outlet on the thermostat elbow. I added an 8mm bypass line from the thermostat to the top of the expansion
tank, this gives a constant flow of water over the thermostat and makes sure it opens.
Before making this mod my car wouldn't idle without overheating, now it will sit happily being revved away without any problem.
Can you try running without the thermostat just as a test. That will at least tell you if it is an issue with the thermostat.
No thermostat isnt recommended, but i think i'll try it anyway. Cant get any worse !
Ben
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rdodger
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| posted on 6/7/13 at 10:07 PM |
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Don't you have a bypass Ben? Doesn't it bypass around the heater circuit?
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Ben_Copeland
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| posted on 6/7/13 at 10:12 PM |
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quote:
Originally posted by rdodger
Don't you have a bypass Ben? Doesn't it bypass around the heater circuit?
I have a link pipe were the heater should be, ive also tried it with the heater circuit blanked off.
I also have a bleed from the radiator and from the inlet manifold. Theres no facility for bleed from thermostat body, but i could tap one in.
Ben
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britishtrident
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| posted on 6/7/13 at 10:39 PM |
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The overheating at idle keeps throwing my mind back to ignition timing, retarded timing causes a huge increase in heat energy rejected to the water
jacket and exhaust.
[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
[/I]
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Ben_Copeland
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| posted on 7/7/13 at 06:06 AM |
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quote:
Originally posted by britishtrident
The overheating at idle keeps throwing my mind back to ignition timing, retarded timing causes a huge increase in heat energy rejected to the water
jacket and exhaust.
It's on a coil pack so I need to check the ecu to see what ignition timing it's running, but would that affect it whilst driving?
Ben
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rusty nuts
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| posted on 7/7/13 at 06:20 AM |
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quote:
Originally posted by Ben_Copeland
quote:
Theres no facility for bleed from thermostat body, but i could tap one in.
It may be possible to bleed by removing the temperature sensor while filling, works on the 8 valve Vauxhall engines . Putting an in line bleed in the
by pass hose might help. If you still have the old thermostat try removing the valve section so you just have the outer ring in place , if that cures
the overheating then the stat isn't opening, probably due to an airlock behind the stat
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Ben_Copeland
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| posted on 7/7/13 at 06:25 AM |
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There's holes drilled in the thermostat so hopefully it shouldn't have any air in there. But I'll try it again with temp sender out
too
Ben
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Roadster
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