Thermostat install - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 10 (permalink) Old 01-16-2007, 03:45 PM Thread Starter
 
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Thermostat install

Help...my son recently bought a 2002 F-250 2wd 7.3...no heat..truck wont warm up....live in Missouri...0 temps outside....thinking it is the thermostat....how tough is it to change yourself...garage wants $140 to do it and can buy thermostat for 12.
Please help with some direction...I know nothing about diesels...if it was gas engine I could help him.
Thanks in advance for your assistance.
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post #2 of 10 (permalink) Old 01-16-2007, 04:14 PM
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The process is the same as on a gasser. Just be very careful with the houseing. They are flimsy at best from the factory. If you need a new one, get a hold of Bob Riley. He sells an aluminum housing and a 203 degree thermostat.

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post #3 of 10 (permalink) Old 01-16-2007, 04:30 PM
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I would drop a line to bob at dieselsite, get the 203 tstat and housing. As above the stock housings should be labeled "one use only".

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post #4 of 10 (permalink) Old 01-16-2007, 05:23 PM
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The single most important thing about replacing a Ford thermostat is to use an OE stat ONLY. Many aftermarket stats have too much leakage when closed, so the engine will never heat up properly, AND they will not open fully causing a very real risk of overheating during the summer.

Also, be aware that you *may* have to pinch off the heater SUPPLY hose (carefully so as not to damage it) briefly to get the coolant to circulate properly after the engine has been drained.

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post #5 of 10 (permalink) Old 01-16-2007, 05:40 PM
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Quote:
Originally Posted by John_G
The single most important thing about replacing a Ford thermostat is to use an OE stat ONLY. Many aftermarket stats have too much leakage when closed, so the engine will never heat up properly, AND they will not open fully causing a very real risk of overheating during the summer.

Also, be aware that you *may* have to pinch off the heater SUPPLY hose (carefully so as not to damage it) briefly to get the coolant to circulate properly after the engine has been drained.

There is nothing wrong with Bobs T-stat... Not sure where you are going with your comment...

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post #6 of 10 (permalink) Old 01-16-2007, 06:10 PM
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I'm with Joe on this one. I've had Bob's T-stat in my truck for nearly 2 years and it gets plenty warm, has plenty of circulation, and don't seem to notice any ill effects whatsoever.

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post #7 of 10 (permalink) Old 01-16-2007, 06:11 PM
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I have never used a non-OE stat, but I KNOW that most aftermarket thermostats are JUNK. I have been to the factory, spoken with the plant manager, and seen how the aftermarket cuts costs by cutting every quality check they can.

Now, I have absolutely ZERO information about what "Bob" is selling, or how his thermostats differ from the OE stats. I am also not making ANY comments about HIS products, since I have never seen or used them.

My only comment is LOTS of "off-the-shelf" stats are junk, so buyer beware.

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post #8 of 10 (permalink) Old 01-16-2007, 06:36 PM
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John,

Your re-statement helps for clarification. I agree that many thermostats are junk, but Bob Riley - www.dieselsite.com has spent the time to get the 203* T-stat right for our 7.3's.

Don't know if they do what he claims, but the billet housing was certainly worth the $

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post #9 of 10 (permalink) Old 01-16-2007, 09:39 PM
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I installed Bobs 203* thermostat a few months ago. No problems. I also replaced the thermo housing with and OEM one. I'm glad I bought it because I wouldn't have wanted to put the original back in. It was very corroded and I don't think it would have sealed correctly.
Drain the radiator to below the level of the thermo and just fill it back up. I would refill it with new coolant.
It took me about an hour total.

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post #10 of 10 (permalink) Old 01-16-2007, 09:42 PM
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Quote:
Originally Posted by John_G
The single most important thing about replacing a Ford thermostat is to use an OE stat ONLY. Many aftermarket stats have too much leakage when closed, so the engine will never heat up properly, AND they will not open fully causing a very real risk of overheating during the summer.

Also, be aware that you *may* have to pinch off the heater SUPPLY hose (carefully so as not to damage it) briefly to get the coolant to circulate properly after the engine has been drained.


I must also agree mostly with John G In the past I have found some extremely bad aftermarket thermos for different cars and trucks but, I think this one from Bob's is a good one. So if you don't buy Bob's, buy the Ford one.

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