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heavyhaulerss
Joined: 29 Jan 2007
Posts: 588
Location: north alabama
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| Posted: Sun Apr 06, 2008 7:20 pm Post subject: thermostats |
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| what would happen if the thermostats were removed. i have a detroit engine & during the summer months the water temp gets too high too quick. & takes the fan longer to get temp back to normal. replaced thermostats. water pump o.k. new radiator, new hosese. e.t.c. when going up hill loaded, temp climbs really fast. not losing water. i remember removing my thermo's in my old 1970's cars & they ran a lot cooler during the summer & i would just put them back in before the winter. i dont know how a diesel engine would run without thermostats. i just know last year i had to run my fan a lot. & trying to figure something out that may help me before the hot days get here. the truck came with 190 thermo's i put in 180 thermo's wich helped a lot but it stays min 190 to 215. running 40,000lbs up slight hill i have to run fan. was thinking either remove thermo's or putting in 170 or 160 degree thermo's..?????? thanks |
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Bandit102
Joined: 22 Nov 2006
Posts: 249
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| Posted: Sun Apr 06, 2008 7:28 pm Post subject: |
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| There's a small hose, maybe 3/8" dia. that comes off the thermostat housing and goes to the radiator tank. Pull it off the radiator, and run the rpm's up. Coolant should shoot out of it, I mean shoot out. If not, take the hose fitting out of the thermostat housing and dig the mud out of it. |
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allan5oh
Joined: 26 Aug 2005
Posts: 2233
Location: jackassville (winnipeg, mb)
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| Posted: Sun Apr 06, 2008 8:14 pm Post subject: |
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| I would fix the problem instead of putting a bandaid over it. Pulling the t-stat may not even help. |
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Bandit102
Joined: 22 Nov 2006
Posts: 249
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| Posted: Sun Apr 06, 2008 8:32 pm Post subject: |
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That's what I was getting at, Allan.
Even though my Detroit was consistantly blowing head gaskets, even with a blown head gasket, IT NEVER HEATED. Something is wrong somewhere and the bypass hose is the only thing I can think of. |
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heavyhaulerss
Joined: 29 Jan 2007
Posts: 588
Location: north alabama
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| Posted: Sun Apr 06, 2008 11:20 pm Post subject: |
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Quote: I would fix the problem instead of putting a bandaid over it. Pulling the t-stat may not even help.
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i agree. i have spent money on process of elimination, because no one could tell me exactly what is causing temp to rise. so to fix.. i have to know what is wrong & even williams detroit cannot reach a conclusion. all say basically the same thing as when i 1st encountered this issue.. goes like this... sounds like thermostat. put in. still run too warm..next.. sounds like radiator. put one it.. still runs too warm.. next water pump.. put one on.. next... ya know that is about the right temp. i know my truck & what temp it has run for 8 years uphill down hill loaded/unloaded. & i know when it runs at a consistant higher temp than ever before. the last diognosis i heard was sys may need to be cleaned with cascade run thru sys to remove buildup that is too thin to see with the naked eye. lol. believe me i dont mind spending any amount of money to fix any problem. but i hate throwing good money after bad. i will look at hose coming off thermo housing as suggested.i do remember taking off & replacing all my hoses. will have another look. thanks for the help. if hose is clear.. i guess i'll have to try different temp thermos or remove them this summer. i am at a loss at to what to try next. add up the cost of all i've done plus the downtime & still have the problem?? sooo unless someone can give me advice that i have not already tried. i have no choice but to remedy this myself as foolish as it may sound. |
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bob h
Joined: 15 Oct 2006
Posts: 670
Location: Nb
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| Posted: Mon Apr 07, 2008 7:28 am Post subject: Re: thermostats |
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heavyhaulerss wrote: what would happen if the thermostats were removed. i have a detroit engine & during the summer months the water temp gets too high too quick. & takes the fan longer to get temp back to normal. replaced thermostats. water pump o.k. new radiator, new hosese. e.t.c. when going up hill loaded, temp climbs really fast. not losing water. i remember removing my thermo's in my old 1970's cars & they ran a lot cooler during the summer & i would just put them back in before the winter. i dont know how a diesel engine would run without thermostats. i just know last year i had to run my fan a lot. & trying to figure something out that may help me before the hot days get here. the truck came with 190 thermo's i put in 180 thermo's wich helped a lot but it stays min 190 to 215. running 40,000lbs up slight hill i have to run fan. was thinking either remove thermo's or putting in 170 or 160 degree thermo's..?????? thanks
Do you have a pyrometer?
Ask a competent shop to connect to the ecm and check the injector calibration codes. If they are all set the same, you've found your problem.
If not, i might recommend pulling the fuel return restricted fitting to see if it's been tampered with.
Bob |
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allan5oh
Joined: 26 Aug 2005
Posts: 2233
Location: jackassville (winnipeg, mb)
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| Posted: Mon Apr 07, 2008 9:18 am Post subject: |
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| What do calibration codes do exactly? |
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Bandit102
Joined: 22 Nov 2006
Posts: 249
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| Posted: Mon Apr 07, 2008 1:38 pm Post subject: |
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| Yeah, Bob, could you elaborate some...This CAT I'm driving right now (I made a post about it under bad kitty cat) doesn't get hot, but you mentioned Pyro - this one will go to 1400 at around 1300rpm and is getting horrible fuel mileage. It has a recent turbo, new CAC and new hoses on it... |
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heavyhaulerss
Joined: 29 Jan 2007
Posts: 588
Location: north alabama
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| Posted: Mon Apr 07, 2008 4:13 pm Post subject: |
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Quote:
Do you have a pyrometer?
Ask a competent shop to connect to the ecm and check the injector calibration codes. If they are all set the same, you've found your problem.
If not, i might recommend pulling the fuel return restricted fitting to see if it's been tampered with.
i have no pyro meter. however i am schedualing a day to have injectors put in since they have over 1.1 mil miles on them. with the exception of one that i had put in a year or so ago. also as others here... the injection calibration codes means what & how does the codes affect the temp ?? thank you. |
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bob h
Joined: 15 Oct 2006
Posts: 670
Location: Nb
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| Posted: Mon Apr 07, 2008 4:28 pm Post subject: |
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allan5oh wrote: What do calibration codes do exactly?
...an electronic fine tuning of the EUIs |
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allan5oh
Joined: 26 Aug 2005
Posts: 2233
Location: jackassville (winnipeg, mb)
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| Posted: Mon Apr 07, 2008 4:37 pm Post subject: |
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| Injector timing? |
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pdm
Joined: 11 Feb 2008
Posts: 60
Location: Waterloo,Ontario, Canada
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| Posted: Thu Apr 10, 2008 8:38 pm Post subject: |
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| Its not timing, its fuel delivery. it fine tunes very small differences in fuel delivered by the injector. Over thousands of injector strokes they won't all deliver exactly the same amount of fuel. The trim codes help adjust for that. The ecm will fire the injector slightly longer or shorter to compensate. Hope this helps, i'm not the best at explaining things sometimes. |
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heavyhaulerss
Joined: 29 Jan 2007
Posts: 588
Location: north alabama
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| Posted: Thu May 15, 2008 2:48 am Post subject: |
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| all new injectors installed. still water temp running higher than normal. shop mgr said could be air to air prob, but did not elaborate??? other than trying a new water pump. i'm out of idea's. last water pump put on 2 years ago. new rad, recent, all new hoses,thermos e.t.c. what should i look for on my air to air. also had air coller leak tested. it's o.k. |
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Part Time Dweller
Joined: 06 Jan 2007
Posts: 335
Location: Western Chicago Suburb, IL
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| Posted: Thu May 15, 2008 4:31 am Post subject: |
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heavyhaulerss wrote: shop mgr said could be air to air prob, but did not elaborate???
That would be the charge air cooler he is referring to. This is up in front of the radiator, it cools the air that comes out of the turbo before it goes into the intake.
If it, or any of the piping have a leak, then the air going into the engine isn't getting cooled enough and will make the engine run hot. You will especially notice this on a grade. If you had a pyrometer, you would be able to tell if this is the problem,as your exhaust and coolant temp will rise together more than they should.
The best thing to do is have the charge air cooler and the plumbing pressure tested. With a million+ miles on the truck, it is quite possible that this could be the problem. |
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heavyhaulerss
Joined: 29 Jan 2007
Posts: 588
Location: north alabama
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| Posted: Thu May 15, 2008 2:10 pm Post subject: |
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| yes that is when it gets hot quick. going up a grade. i have no pyrometer though. will have it checkedd out thank you |
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