Hey, hope someone can help me out, heres wats going on...car is fine to warms up, then temp gauge rises to just under red then drops back to blue and then floats slightly up and down, heavy coolant loss but cant see where its going, had the pressure checked its holding it fine but can open it the `next` day and theres still pressure there but harldy any coolant....oil mix is not milky (not using anti-freeze), and it cuts out a cyclinder after it warms up........sounds like cracked head but some signs point against it.....any help appreciated, had two mechanics look at it(500..00 bucks) and its exactly the same..................thx
Just because the oil isn't milky doesn't mean the gasket isn't blown. It may be leaking into a cylinder and evaporating when the cylinder fires. Do you have any steam coming out the exhaust? There is a test that mechanics can do to see if there is any exhaust gas present in the coolant. From the symptoms you are describing, it deffinately sounds a lot like a blown head gasket or cracked head.
1992 AXII Telstar TX5 Ghia
121kW 2.5L DOHC V6 in a car that weighs 1100kg's and looks like a 4 banger from the outside......SLEEPER!
1988 EA S Pak 3spd CFI.....Soon to be a 250rwkw HSV eating machine.
Another indicator of a cracked head or head gasket problem.
On a cold startup, does your engine run rough for a few seconds then clear up?
If so, it's likely to be trouble. When you park the car for the night the cooling system is still pressurised and forces coolant into the combustion chamber through fractures in the head or leaky head gaskets. The engine eventually cools down and the cooling system is de-pressurised to the point where no more coolant is forced out. Because it's overnight enough water will gather in the combustion chamber to cause a rough start up.
BA XR6 NA Mercury Silver (daily drive)
XC Fairmont Coupe (sunday cruiser)
thx for the replies....it actually starts up real good, not rough, its after it warms up, the ride changes and gets shakey....when i changed the thermostat the old one was a single i think(much smaller) but theres the duel one now and makes no difference....its driving me crazy..............
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