150*running temp

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Nov 4, 2013 | 06:20 PM

BstrdXJ

Thread Starter

Junior Member

Joined: Aug 2013

Posts: 88

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From: Bothell, WA

Year: 1999

Model: Cherokee

Engine: 4.0 H.O

150*running temp

My XJ runs 150 at all times, aside from idling for a while in the hot sun. Highway, or in-town.. 150* How bad is this?

93 Block, 89 manifold.

Nov 4, 2013 | 06:26 PM

wiggles

CF Veteran

Joined: Dec 2010

Posts: 9,897

Likes: 2

From: shawnee,ks

Year: 1993

Model: Cherokee

Engine: 4.0

My 93 has been that way for a good while, I've been meaning to work on it but haven't seen any I'll effects yet.

Nov 4, 2013 | 06:26 PM

DFlintstone

CF Veteran

Joined: Aug 2011

Posts: 10,489

Likes: 24

From: Nor-Cal Coast

Year: 90,84

Model: Cherokee

Engine: 4.0,2.5

If that's correct, it will affect your mileage. You want to be closer to 200*. There might even be an issue or your computer, (ECM), running it on "default" settings, in "open loop". The 195* OEM T-stat really is best. I bought a non OEM, then ended up changing it. (don't forget to put the hole in the t-stat up at 12:00!).

Nov 4, 2013 | 06:27 PM

BstrdXJ

Thread Starter

Junior Member

Joined: Aug 2013

Posts: 88

Likes: 0

From: Bothell, WA

Year: 1999

Model: Cherokee

Engine: 4.0 H.O

I haven't seen/felt any ill effects either, but I don't want something to happen.

Nov 4, 2013 | 08:45 PM

jamorrowxj

Seasoned Member

Joined: Nov 2012

Posts: 393

Likes: 0

From: new york

Model: Cherokee

Take out that thermostat and flush your block with a garden hose and or pressure washer and stick a blow gun in all your water lines and blow out all the nastiness.