make your mind up (climbing temperature)
Any one experienced this?
1984 300GD with turbo conversion
Engine temp seem's fine normally but about 5 mins after starting off in the morning the temperature gauge climbs all the way to the top, it gets worse when I stop in traffic. If I rev her to about 3000rpm and hold it there the temp drop's all the way back down, I have to do this about every 2 min's until I'm back on the open road, every thing then seem's fine for the rest of the day.
But this happens every time I take her out, if I leave her idling to fully warm up before driving she starts to smoke quite alot after a couple of min's.
Fluid level's in radiator seem fime and there's no milkyness to the oil.
Any idea's
Hi sticky thermostat....since no water flows around the head until the stat opens if its only five minutes it could be blocked water galleries... decayed impellor in the water pump...revving will speed up the water pump but with the stat closed it does not circulate.might be an airlock ..does the heater get hot?? ....I would look at the thermostat first because water temp is ok once the engine is hot it means the stat is eventually opening....rgds
Hi certainly sounds like a circulation problem!! your turbo is'nt watercooled by any chance??? could even be a water hose that has collapsed inside.need to solve the problem quickly because serious damage can result from overheating....fuse for blower is 8amp ...also linked to the rear heated window...could be a broken wire in the loom between the door frame and the door causing the fuse to blow or bearing failure in the blower motor determined by rumble or screech when blower is operating at high speed..
Since I just joined the forum, I'll share my experience with the Turbo conversion.
During the many years I've been using the G, the temperature issues were due to the following problems.
Cooling system loosing pressure
Leaking radiator (the sump shield is so big, that holds the water and you wont see it drop on the road)
Faulty Visco fan (if you have one fitted)
Electric fan not kicking-in
Faulty temperature gauge and/or faulty grounding
Deformed pre-combustion chamber which can subsequently fail and ruin the piston
chilliepepper,
Could the smoke from the exhaust be steam (white in colour)?
If so that coupled with intermittant heat output could suggest an airlock induced by cylinder head gasket failure.
Does the cooling system get up to operating pressure quickly?
Is coolant being pushed out of the radiator overflow?
If you are unlucky enough to have a blown head gasket; one way to prove if it has failed is to fill the cooling system up to the brim, leave the radiator cap off and start the engine. You should see water/coolant being pushed out of the radiator and/or air bubbles emerging. Note: This will only occur if the failure is fairly bad.
As already suggested; poor coolant flow may be the cause but this would not cause smoke from the exhaust unless seriously overheating?
I would advise not driving the G until you have sorted this problem. More serious damage may result if overheating continues to occur.
Kind Regards
Peter
To determine if you have a partial head gasket failure;
Fill up with water
Drive car normally
Stop
Leave overnight
Then first thing before any starting etc.. remove overflow pipe. remove the radiator cap while listening; You should get a suck in of air .. but if you get an out flow of air/pressure then there is pressure getting into water system and likely head gasket failure.
Had to think up this test for old Citreon diesel that would slowly consume water and only blow gasket when really pushed hard towing.
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Thanks fixwin,
The heater does get hot but the temperature varies on any given setting blowing cool for no apparent reason and then getting hot again.
Also it's blowing the heater motor fuse once a week or so, does anyone know what fuse rating i should be putting in?