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Thank you for reading everything and giving your advice. I’m going to have to get the gauge but this hasn’t worked since I got the truck 2.5 years ago. I did waste money just replacing parts like an idiot. 2 Cadillac valves,time delay,hoses from Cadillac valve water crossover sensor lol and 3...
Yes, I've read every post in this thread.
It does jump around a bit to be honest, and with everything going on, it seems that each of the individual pieces of the system pass when tested individually, but that overall the system still doesn't appear to function properly.
At nowhere that I read...
I changed the parts 2nd Cadillac valve and fan still stays engaged. But if I hook my air compressor to the shrowd I can get it to free wheel
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The only components in the fan system are the fanclutch, time delay relay, Cadillac valve, temp sensor on the crossover pipe and the switch on the injector pump. During nomal operation below 185 degrees the Cadillac valve is energized passing power steering fluid to the fanclutch to disengage...
Great info! A couple quick questions on your setup.
What compressor did you end up going with?
And the crank and water pump pulleys, do you have part numbers or where you obtained those from?
What are you doing for lights? High beams on, I bet the stock lighting circuit draws 20A at 12v.
For OP (converted to 12v), I would recommend what others have suggested. Try to find a 6.2/6.5 in a junkyard with brackets for an A6 compressor. You'll need brackets shown at the link below...
You could look at my clutch unsticking procedure here.. But use your best judgement. I probably would have gone with a less aggressive punch when whacking my clutch.. But it freed it up,, https://www.steelsoldiers.com/threads/what-have-you-done-to-your-hmmwv-today-lately.147917/post-2308819
Update on Bowtie Overdrives: I have been unsuccessful in getting any monetary help from Bowtie Overdrives. I paid a reputable shop to install the trans purchased from Bowtie. Bowtie claims we did not follow their warranty instructions by providing line pressures and other items to make sure it...
I believe that is a HMMWV coolant crossover manifold. I have brand new ones in the plastic. Do you like that? It does the same thing as the CUCV. It is far from the position to put a temperature gauge sending unit. Head temperature is the place you want to tap for an accurate reading of engine...
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I have to agree with @Sharecropper ...
Heck of a good write-up @Barrman !
It they have anything at all that will solve the problem - just based on being able to talk to the guy you talked to 5 years ago - I would be willing to spend more money there!
I did some more research about engine braking with the 4L80E. Then I read through my Compushift 90 page manual and found an option for locking the torque converter in any gear. That made me curious so I called them up. I bought their transmission control module 5 years ago mostly based on the...
The black kettle looking thing by the firewall with the sight glass on it is your power steering reservoir. Power steering pump does a bunch of jobs on the HMMWV, it also powers your brakes and the fanclutch so make sure it's topped off and functional. It uses dextron 3 (basically ATF) not...
You need to pick up the brake light signal under the dash at the switch, after that it goes through the turn signal switch and is useless for that purpose anywhere under the vehicle.
I have no idea why you would want to disable the TC lock under full throttle, on a long hill for example you...
Update on the swap. The trans had to come back out and be re-rebuilt. I drove the HMMWV less than 100 miles. Reverse started slipping. Felt literally like a badly slipping manual clutch. When you selected reverse it would barely make a shifting noise and barely move. I talked to Bowtie initially...
The "civy" pump (metric Saginaw P series) is the same the only difference is the pressure relief valve, I used a rebuilt (Cardone) one for 3 years on the Detroit before going to the remote type when re-powered with the GEP turbo.
The only thing I did was use the pressure/flow tune up kit...
Any idea if the core is _really_ different then the CIV pump? Or is it just a higher tension bi-pass spring to keep the pressure up. (I'm assuming it would be different if it's higher pressure AND higher flow then a standard one.)
Since you have a thermal fan, someone has tinkered with it using civy parts. The Integral reservoir pump is a standard GM Saginaw design but the hmmwv uses a specific to it only higher pressure pump due to the hydraulic fanclutch not used on Gm, Hummer, or civy models and some trucks can be...
That is not going to happen on any hot day, not if you are trying to get somewhere at least, you will probably not see any difference with the 180 thermostat but in the winter when you would be happy to get 190, the fan controls the max temp not the thermostat.
They all run hot, at least all...
What was the high temp reading on the gauge?
My understanding is that the system can work in the range of 190-230 under load and full throttle should disengage the fanclutch for 20 sec indeed. I freaked out thinking my hmmwv was overheating but I was told it's actually normal.
That being, I'd...
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