![]() With oil drained and drain plug removed, you can refill cooling system with water to see if water starts coming out the oil drain plug hole, that wouldn't come from a cylinder leak, it would be from a cooling passage leak, i.e. If there is no cylinder leak then coolant can leak into oil pan from intake manifold's connections to the heads, the coolant crossover passagesĪs said pull the lower intake and look for signs of coolant in the valley above cam shaft Pump it up to 15psi then crank engine over, if gauge starts to bounce then cylinder is pumping pressure into the cooling system You can do the same thing with a Cooling system pressure gauge If you want you can pull out 1 spark plug at a time and retest, when glove stops bouncing the last spark plug removed was from the leaking cylinder I bought it a couple months ago but Ive driven it pretty sparingly. ![]() If glove starts to bounce you have a blown head gasket or cracked head, the 150psi engine compression is being pushed into cooling system I have a 2000 Ford Ranger with the 4.0L OHV V6. Put a latex glove over rad cap opening, including overflow hose connection You don't need to have coolant in the system to test it, but all hoses have to be connected and tight ![]() Glove test or pressure test cooling systemīasically you seal the cooling system and crank the engine over, but do not start it, so disconnect the coil Thanks uksparky, After eliminating the intake gaskets, and now the timing cover, I guess. They cancel each other out.What I would do first is to see if I have a cylinder leak into the cooling system, i.e, blown head gasket or cracked head I really hope the previous owners did not top odff with that orange shit. Covering the Explorer, ST, Lincoln Aviator, Sport Trac, Mercury Mountaineer, Mazda Navajo, Ford Ranger, Mazda Pickups, and the Aerostar. Just did a valve cover and the engine looks like it has been taken care of.Ĭoolant was just changed, when I had just got it I could see greenish coolant dripping down from under the engine, the in the reservoir it did have a orange tone. Ford Explorer - Ford Ranger Forums - Serious Explorations Search forums Performance Upgrades - Maintenance - Modifications - Problem Solving. I am more of the person to buy a tool than rent it, next pay check Ill get a pressure testor hahaĬompany owned ->Lost during company failure? -> bought at tax auction by British fellow lol > after 4 years Brit fellow sold to me. Oh and while I was playing with the temp gunb yesterday (when Bluetooth was telling 240F) I thought I would check out the exhaust port, the one that is above coming from the engine, it was pretty the hottest thing I could find on the truck prob 220, by that time thing have cooled. MY temp gun reads 140 F on the upper coolant hose My coolant temp gauge on my andriod has a range of 120-176 F Riscorpian that is a good point, I have seen other forums touch on that topic. How many miles btw? Coolant look good or does it look rusty/muddy? If you think you have a head gasket issue then you need to rent a pressure tester from the local auto parts store and pump it up to around 15 psi to see if you have a leak in the cooling system. You may have more horsepower than the old 2.5/2.3 but the old engine is cast iron and can handle overheating better. ![]() You get that engine too hot and your gonna warp a head. Plus you have the DOHC which is a full aluminum engine (heads and block). It should only read a few degrees hotter than that. If under pressure, it will raise the boiling point. But one overlooked thing can also be why. Some are if you have a bad thermostat, fan clutch, water pump or ECT sensor. The bubbling can come from a couple of things it ain't normal. THinking about swapping out for the explorer radiator, any one have an opinion on that?Ģ42 seems high to me. Re: Coolant being pushed back into resavoir. Living in sunny Florida, my coolant temp on my bluetooth OBD II reports temps up to 242 F when I drive reving up to 2800 before changing gears.Īfter getting home and and letting it idle I get 180 F As I am searching for the issue with my coolant, I am beginning to wonder if I am a victim to an impending blown gasket.
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