Question about 1989 Mazda RX-7
The engine temp runs at about 72 deg at 120km/hour and elect fan is set to cut in at 82 deg ,but at low speed 80km/hour the temp will go up to about 84 deg and the fan is working and cooling. but if the engine is turned off ,the engine will start to boil and will force water out the overflow and the water in the engine is thumping loudly.but if you idle the engine for about 5 mins it might not boil .I have changed two thermostats with the same results. the engine temp at 72 deg is to low,it should run at 82 deg all the time and the turbo is not red hot , but turbo is oil and water cooled the water feed for the turbo comes from the back rotor and returns by the front rotor just under the thermostat.With turbo water returning under the thermostat would it make thermostat stay open?
so should i make the return hot water go in the top radiator hose so it can be cooled in the radiator
I am only making about 250 hp. when my overheating problem is solved we will increase the boost from 6psi to 12psi and look for about 450hp at 9000 rpm
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Posted on Dec 07, 2008
If our engine run at 82 celcius there no reason its start boiling when you turn it off its normal for temp to raise when you turn off the engine but to start boilling thats mean our temp is higher then 84 degre check our gauge manuelly check the temp with a thermometer directly in the radiator and compare with the gauge that mean the faster you go colder its get so the radiator does its job but what weird it goes up at lower speed so not enought air goes trough the radiator are you missing a front spoiller that redirect the air to the radiator if you raise the boots you gonna have to raise the cooling capaciter of the car check it out let me no. . pierre
Posted on Dec 07, 2008
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Posted on Jan 02, 2017
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