not your normal over heating

[Monark78]

Whats going on: '89 Ranger with a 150 Merc. that overheats real quick. Put it on the trailer trim it up and it cooled off to about 1/4. <br /><br />History: It has been overheating for years. It has been taken to the shop dozens of times. New everything. <br /><br />Any help would be appreciated.

 

[Laddies]

Re: not your normal over heating

It sounds like it is sucking exhaust instead of water ck the gaskets and seals at the bottom of the pump hsg. I think I remember a service bull. on this it required RTV on the divider between Exhaust and water pickup cavities you could also have a crack in the casting in that area---bob

 

[Monark78]

Re: not your normal over heating

I looked there when I r/r the impellar but it couldnt hurt to look again

 

[KCLOST]

Re: not your normal over heating

Have you checked the poppet valve?

 

[Monark78]

Re: not your normal over heating

Thanks but my mechanic checked the poppet

 

[jwr_20]

Re: not your normal over heating

Does your water pump have poor output? I had a motor that did and after taking it apart I found mineral deposits from the water built up in the water passages. I used CLR to clean it then put it back together. Knowing that then, I would have just flushed the motor with CLR.