2000 Mazda MPV Cap

HOPPERDHOPP

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2000 MAZDA MPV
78,000 MILES

I Have This 2000 Mazda Mpv Lx 2.5 6Cyl Van And It Keeps Running Hot. I Was Just Trying To Check It Over Today, To See If I Could Find The Problem, When I Noticed That The Radiator Cap Was So Easy To Remove And Put Back On. I Did Not Have To Apply Any Pressure At All. Would This Be A Sign That The Cap Is Bad? Thanks For Your Help. Richard Whitman.

5 Replies

KHLOW2008

MECHANIC
41,814 POSTS

Overheating is mainly due to lack of coolant in syatem. When removing the radiator cvap, was the coolant level correct?
Radiator cap must have a certain pressure to it to prevent coolant from leaking out of it.
If coolant level is correct, you would need to check the cooling fans.

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Wednesday, July 24th, 2013 AT 8:00 AM

HOPPERDHOPP

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Thanks For Your Reply About Radiator Cap. But My Problem Is I Can't Keep Water& Coolant In This Van. I Make Sure It Is At The Proper Level Before Driving But Before I Can Travel Ten Miles It Is Over Heating And The Water& Coolant Have Leaked Out. I Have Double Checked The Water Hoses And I Can Not Find Any Leaks. When I Have Replaced The Water&Collant To The Proper Level And Crank It Up And Just Let It Idle For Awhile, It Does Fine There Is No Water Are Coolant Lost And The Temp Is Normal, But When I Take It Out On The Road And Do Not Drive Over Fifty Five The Water& Coolant Will Be Lost And It Will Be Running Hot Again. Question Is What Goes With Water&Collant When Driving On Hwy And It Does Not Lose A Drop If It Sits And Idles All Day? This One Has Me ! Hope Ya'll Have An Idea. Thanks For Your Help! Odell R. Whitman.

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Wednesday, July 24th, 2013 AT 12:34 PM

KHLOW2008

MECHANIC
41,814 POSTS

Since you are having coolant losses issues. Overheating would definitely be there.

Is the recovery tank (coolant reservoir) depleting or overflowing? If it is overflowing, either you have a bad head gasket or radiator cap.

Did you try replacing the radiator cap?

If there are any leakages in the system a pressure test should let you know where the leak is coming from.

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Thursday, July 25th, 2013 AT 7:59 AM

HOPPERDHOPP

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Thanks For Your Reply. I Will Replace The Cap And If I Still Have The Problem I Will Have It Pressure Tested. I Will Let Ya'll Know Later The Out Come. Thanks For Your Help! Odell R. Whitman.

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Thursday, July 25th, 2013 AT 11:12 AM

KHLOW2008