COOLANT GAUGE UP AND DOWN 4.0L
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Lead Driver
Joined: May 2003
Posts: 9,303
Likes: 48
From: Lyndonville, Vermont
COOLANT GAUGE UP AND DOWN 4.0L
Guy's check this out. Never saw this..
http://ww2.justanswer.com/uploads/fo..._190204_A1.pdf
Also its not air or the thermostat that does it.. My white van is down 4" in the rad and the gauge is steady..
Just put a motorcraft thermostsat in my blue one and no change. Level is full, full..
Dick
http://ww2.justanswer.com/uploads/fo..._190204_A1.pdf
Also its not air or the thermostat that does it.. My white van is down 4" in the rad and the gauge is steady..
Just put a motorcraft thermostsat in my blue one and no change. Level is full, full..
Dick
Postmaster
Joined: Apr 2001
Posts: 3,818
Likes: 3
How weird, in the recent past, I have had a really strange "percolation" (thumping) sound at times that I could never pin down. I did replace the pump (a rebuilt Motorcraft unit) with an aftermarket and the noise has not recurred.
Thanks for the TSB!
On edit: Here is the link to the strange percolation problem for future reference: https://www.ford-trucks.com/forums/7...ause-this.html
Thanks for the TSB!
On edit: Here is the link to the strange percolation problem for future reference: https://www.ford-trucks.com/forums/7...ause-this.html
Last edited by aerocolorado; Mar 24, 2010 at 11:14 PM. Reason: add link
Thread Starter
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Lead Driver
Joined: May 2003
Posts: 9,303
Likes: 48
From: Lyndonville, Vermont
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Mountain Pass
Joined: Oct 2002
Posts: 205
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From: Jaqcksonville
Ive noticed that if the engine is low on coolant to the extent that the sender is not in the coolant needing approx a half or more coolant to top the gauge still reads at the a in normal. This condition still happens after changing the sender and checking the gauge. This i think causes a lot of heads to crack including mine. Ive had to put a new head on the pass side. 4.0l.
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Elder User
Joined: Dec 2006
Posts: 830
Likes: 0
From: Kitchener,Ontario,Canada
Bad Thermostat, or bad water pump impellor? I had this exact symptom last fall, blew a heater hose because of it. I changed the t/stat & gauge is now rock steady. Engine now runs at 195* before it would travel up to 210/215 before opening.
Elder User
Joined: Dec 2006
Posts: 830
Likes: 0
From: Kitchener,Ontario,Canada
Must be pump or possibly a partly blocked coolant line or passage?
Thread Starter
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Lead Driver
Joined: May 2003
Posts: 9,303
Likes: 48
From: Lyndonville, Vermont
Ok so listen to this: My wifes white van goes up to 177 deg and stays there rock solid..Its got a 190 deg thermostat new..Mine goes to 200 back down to 180 all day..
My wifes must not be closing I guess...I'll have to check my green van when I get it out of the garage. I think that one goes up and down a little...GRRRRRR
My wifes must not be closing I guess...I'll have to check my green van when I get it out of the garage. I think that one goes up and down a little...GRRRRRR
