I have just rebuilt a v8 lotus but have a coolant problem. the engine run perfect until it is made to accelerate hard,it then disperses coolant from the header tank onto the road. Just after being accelerated even once it will do this and then start to overheat. If the car is stationary it can be reved with no dispersal of coolant. It has a new pressure cap, radiator,thermostat, waterpump,no coolant in oil and no oil in coolant. also had a dye test done for gases from the header tank again negative

SOURCE: 2004 Jeep wrangler 4.0 - 6cyl overheating

I had the same overheating problem in my jeep ! My problem was finaly found out to be the clutch in my fan its a different kind of clutch system it work as this. When your jeep gets warmer the tighter your fan clutch gets .While cool your fan moves slowly. now to test your clutch just warm up your jeep and rev it up a bit if your fan dose not pick up speed then it is sliping.What will come out of this is that you fan will the seez and run full all the time. if you jeep dose not overheat wile moving then it is not your thermo stat period.

Posted on Oct 14, 2008

SOURCE: Car Overheats after 12 to 15 minutes of running. Temperature decreaes when I accelerate.

your fan is the problem...it's not turning fast enough to cool the engine off. I need more info on what type of fan you have....elec fan or a clutch fan?

Posted on Apr 24, 2009

SOURCE: Coolant Problems

Hi there. It sounds like you have done the most obvious checks and I can assure you by-passing the heater core will have no effect. There are three possible causes that you need to investigate further and you will need specialist equipment for it - you either have a hair-line crack in the head or cylinder wall or it might be that the head bolts are stretched and therefore weakened and so need replacement. To help you identify these aforementioned possible problems, you might need a specialist fluid that you put into the cooling system which changes colour when combustion chamber pressure enters the cooling system, you need to contact your local Ford Dealer for this - but then you still have the three possible problems to deal with - cracked cylinder wall/s, cracked head or stretched head bolts. Hope this helps, Scottech.

Posted on Jun 17, 2009

Dan Horsefield

• 287 Answers

SOURCE: car wont start but cranks fuel not being dispersed

There is a fuel pump shutoff reset button under the dash on the passenger side. If you recently bumped something with the front bumper it may have activated the "emergency fuel shutoff" and you will have to click this button to "reset" the fuel system.

Posted on Jul 24, 2010

SOURCE: the formation of rainbow is

a medium (such as a prism) that refracts or breaks apart the white light into discreet wavelenghts. Is that all? :)

Posted on Feb 20, 2011