Phreddy
Bye SV6 - still love you
- Joined
- Apr 5, 2005
- Messages
- 1,425
- Reaction score
- 40
- Points
- 0
- Location
- W-Sydney NSW
- Website
- www.asr-audio.com.au
- Members Ride
- VS-II Statey-8
G'day there guys.
My VSII V-8 is getting too hot, but it's a bit of a wierd one....
It only seems to overheat when on the freeway, or during a sustained higher speed run for 20+ minutes or so. Putting around in traffic doesn't bother it too much. I've checked the obvious things, replaced the thermostat (cheap enough), and was about to do the water pump but after I'd removed it the one on the engine was fine. Full reverse flush of the block, radiator, and heater core, then refilled with brand new Nulon coolant at the correct dilution.
The radiator is a rconditioned unit, installed by Natrad about three months ago. (before I got the car) Therefore I'm not suspecting the rad, even though I suppose the symptom points to a partial blockage...(?)
(has anyone else experienced trouble with Natrad's work?? I though a reco radiator was pretty straightforward)
It's still carrying hte standard "clutch" fan - one thing I've noticed is that even when the engine is hot, there's not a lot of resistance when turning the fan by hand (with the engine stopped of course!) - I though these were supposed to "tighten up" a bit when they get warm.... ????
Question - does the fan clutch play up? Is it the sort of thing that can be suspect in a situation like this??? I'm toying with the idea of pulling the engine fan off anyway, and fitting a thermo electric fan...
Ummm - one other thing that I might mention.... I've fitted a set of headers (to replace the iron manifolds), and the fella I bought them off said that they shouldn't have a manifold gasket fitted.... I don't disbelieve him, but is that info incorrect?? (I wonder of a gasket provides some level of heat insulation, and if the headers are bolted straight up the heat from these is making the heads hotter - therefore heating the coolant more than it should be...) Dunno if that's logical but I'm running out of ideas.
Should I check the base timimg? (if it's too advanced, that would make it run hot, right?) Is it possible that there IS something wrong with the water pump, despit that it looks fine? (it's the type that has the cast iron impeller, not the cheaper spot-welded type) The bearing seems fine, and there's very little corrosion....
Anyhow, input welcomed.... I have to drive to Melbourne in a little over a week, will be a slow trip if she's always near boiling though...
Thanks guys! :bang:
My VSII V-8 is getting too hot, but it's a bit of a wierd one....
It only seems to overheat when on the freeway, or during a sustained higher speed run for 20+ minutes or so. Putting around in traffic doesn't bother it too much. I've checked the obvious things, replaced the thermostat (cheap enough), and was about to do the water pump but after I'd removed it the one on the engine was fine. Full reverse flush of the block, radiator, and heater core, then refilled with brand new Nulon coolant at the correct dilution.
The radiator is a rconditioned unit, installed by Natrad about three months ago. (before I got the car) Therefore I'm not suspecting the rad, even though I suppose the symptom points to a partial blockage...(?)
(has anyone else experienced trouble with Natrad's work?? I though a reco radiator was pretty straightforward)
It's still carrying hte standard "clutch" fan - one thing I've noticed is that even when the engine is hot, there's not a lot of resistance when turning the fan by hand (with the engine stopped of course!) - I though these were supposed to "tighten up" a bit when they get warm.... ????
Question - does the fan clutch play up? Is it the sort of thing that can be suspect in a situation like this??? I'm toying with the idea of pulling the engine fan off anyway, and fitting a thermo electric fan...
Ummm - one other thing that I might mention.... I've fitted a set of headers (to replace the iron manifolds), and the fella I bought them off said that they shouldn't have a manifold gasket fitted.... I don't disbelieve him, but is that info incorrect?? (I wonder of a gasket provides some level of heat insulation, and if the headers are bolted straight up the heat from these is making the heads hotter - therefore heating the coolant more than it should be...) Dunno if that's logical but I'm running out of ideas.
Should I check the base timimg? (if it's too advanced, that would make it run hot, right?) Is it possible that there IS something wrong with the water pump, despit that it looks fine? (it's the type that has the cast iron impeller, not the cheaper spot-welded type) The bearing seems fine, and there's very little corrosion....
Anyhow, input welcomed.... I have to drive to Melbourne in a little over a week, will be a slow trip if she's always near boiling though...
Thanks guys! :bang: