Mazda RX7 Overheating


Old 04-05-02, 09:03 PM
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Mazda RX7 Overheating

Im having problems with my 1987 Mazda RX7 (non-turbo)
My problem is this : sometimes it overheats sometimes its
fine. I can drive it all day with or without the air conditioner on
and its fine. while other times It over heats within 1/4 mile.
even after setting all night. I replaced the t-stat , rad cap,
and fan clutch. The water pump seems to be okay, water is
flowing good , no signs of leaking around weep hole.
I am not loosing any coolant other than what boils out when
it over heats. outside temp doesnt make a diff, It sometimes
happens when its cold out or hot.

By the way this problem just started about 1 week ago.

Any suggestions would be appresiated.
Thank you.
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Old 04-05-02, 11:24 PM
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When it overheats does the fan come on?
If not it may be a fan motor,fan switch, or relay.
Old 04-06-02, 08:14 AM
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I agree. You might also have a plugged radiator.

Take it out to a radiator shop and have them flush it for you.

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