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
Hi and welcome to FixYa,
A couple of ideas you may want to explore:
Good luck and Thank you for using FixYa. Happy Holidays.
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
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Nov 28, 2016 | Cars & Trucks
Apr 12, 2016 | Mazda Cars & Trucks
Dec 04, 2012 | Cars & Trucks
Sep 06, 2011 | 2006 Hyundai Sonata
Feb 02, 2011 | Volkswagen Touareg Cars & Trucks
Sep 18, 2010 | 1989 Isuzu Trooper
May 03, 2010 | 2006 Chevrolet Silverado
Apr 18, 2010 | 1989 Mazda RX-7
Nov 03, 2009 | 1989 Mazda RX-7
423 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: