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Yes, I am bleeding the cooling system, so I'm shure there are no air bubbles. As for the thermostat I have tried about four different brands I think that they were all 195 deg. Each and every one I have tested before and after I use it, in a pot of water on the stove, and they all work fine. I have thought about an obstruction in my system, and only have a few things left to look at. The block and head have been boiled, and are very clean. Like I mentioned earlyer I replaced many parts including timing chain cover, water pump, and both sides of the thermostat housing, heater core, radiator, and about half the hoses from the waterpump housing to the intake and such. The only thing in the cooling system I have not messed with, is the intake manifold, and that steel line that crosses the back of the engine to the lower radiator hose. Does this engine have a thermostat bipass line that lets coolant circulate when the thermostat is closed? I know there are many passages inside the intake, but I can't find any documentation to show where they go. Could the EGR have anything to do with this? I have also had alot of problems with pinging, and played with the EGR. At idle it vibrates slightly, causing it to idle rough some times. I replaced the EGR vaulve, and the diaphram that hooks in front of it, and there was no difference. Is that electronic controller vaulve that the EGR vacuum lines run to controlled by the ECU? Ok enough questions for now thanks again. Bob
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89 Sentra owner 9 years 205,000 miles and counting!
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