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1986 Mazda B2000 overheating

Tiny
KEN52
  • MEMBER
  • 1986 MAZDA B2000
  • 2.0L
  • 4 CYL
  • RWD
  • MANUAL
  • 200,000 MILES
I've been trying to figure out why this truck overheats.
Watching the temp gauge it seems that every time the them stat opens it loses water but I cant find a leak anywhere.
The engine is well used but I use it just for moving things a getting pellets for the stove.
Can't find a sign of a leak anywhere. Hoping you can help.
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Monday, July 6th, 2015 AT 1:23 PM

8 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
Is it actually getting low on coolant or does it just seem like it is losing water?
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Monday, July 6th, 2015 AT 9:09 PM
Tiny
KEN52
  • MEMBER
  • 38 POSTS
It loses anywhere from 1 to 2 quarts of water depending how far you drive, and the overflow jug doesn't seem to be recirclating the water. Its always full where the radiator not.
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Monday, July 6th, 2015 AT 9:22 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
It has to be going somewhere. Have you checked the engine oil to see if it is getting in there? Is there any white smoke from the exhaust?
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Tuesday, July 7th, 2015 AT 7:27 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
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One other thought. When the engine is cold, remove the radiator cap, make sure the coolant is full in the radiator, and start the engine. Does the coolant shoot out of the rad?
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+4
Tuesday, July 7th, 2015 AT 7:28 PM
Tiny
KEN52
  • MEMBER
  • 38 POSTS
It blows bluewhite smoke which turns more blue when your driving.
Ther is no water in oil and it runs just fine before it overheats.
Cant seem to find any sign of a leak.
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Tuesday, July 7th, 2015 AT 8:15 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
Is there a sweet smell to the smoke?
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Thursday, July 9th, 2015 AT 8:02 PM
Tiny
KEN52
  • MEMBER
  • 38 POSTS
I will check and respnd back, I work nights and sleep days so its hard to find the time. When it starts ther is a lot of smoke and even when your driving.
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Thursday, July 9th, 2015 AT 8:24 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,885 POSTS
Okay. Let me know. Something is telling me there is a bad head gasket and coolant is getting burned in the combustion chamber. I hope I'm wrong.
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Thursday, July 9th, 2015 AT 8:42 PM

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