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Old 12-29-2012, 10:29 PM   #1 (permalink)
The_CableGuy
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99' Cooling Upgrades

I pulled my 35ft tag along recently back from it's permanent space in the Appalachain Mountains. The truck seemed to do fine the temp gauge never got over about 205 but I don't have Egt or Trans Temp Yet. Just not in the budget at the moment. I have heard that duramax cooling fan upgrades are good for the older 6.5's but will it do any good on my 99' ?? and what Is Required to install te dirtymax fan? A diff clutch?? Is there any other things i could do to keep the temps down?? I understand that this thing ain't a powerhouse and i have to know when to let off but i just want to keep the temps as low as possible when towing this trailer (10,000lbs loaded) and my 15' enclosed trailer (5,000lbs loaded)

Thanks in Advance,

The_CableGuy
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1999 C/K 3500 6.5TD, Extended Cab, Dually, Vin F,171,000 Miles on Body, 50,xxx on Engine, High Idle Mod, PMD Mounted In Front Bumper on Heat Sync, #9 resistor, Diamond Eye Turbo Back Exhaust....Mods to Come: 3 in 1 gauge with EGT,Trans Temp, Boost, Turbomaster, Fluidampr Harmonic Balancer
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Old 12-29-2012, 11:33 PM   #2 (permalink)
WYELKHUNTER
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I just upgraded this summer. I got a Hayden heavy duty clutch and a dmax fan. Everything bolted up really easy, but that dmax fan just barely fits! That setup is pretty awesome! Of course I did a flush and fill and added some water wetter. I'm also running 180 degree stats(previous owner put in).
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1998 Silverado K1500 6.5TD Ext. Cab VIN S 158k - 4" Diamond Eye(w/muffler) w/3" downpipe and Flo-Pro crossover, new grey Stanadyne PMD mounted in front bumper nostril on heat sink, Carter LP (for '93), Bosch Duraterms, VDO Boost Gauge, gutted plenum "webbing", Hayden heavy duty fan clutch w/AC Delco "duramax" fan, dual 180 stats.
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Old 12-30-2012, 12:23 AM   #3 (permalink)
THEFERMANATOR
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Being a 99 you could have either the bolt on style fan clutch(early 99), or spin on style fan clutch(late 99+). The spin on style fan clutch water pump is a better design that has a better balance flow from bank to bank. If you don't know when the fan clutch was last done, then it is a good idea to replace it with a HAYDEN severe duty(fan clutches should be changed about every 5 years or 60K miles). If you have the early bolt on style fan clutch, you could switch to the later style water pump and fan clutch to get a better balance of flow. The 01-05 DURAMAX fan blade is the one you want for the most airflow. Your stock fan is most likely the 9 blade 20" steel unit now, but the DMAX fan blade will move more air.
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Old 12-30-2012, 03:02 AM   #4 (permalink)
GM Guy
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exactly what fermanator said, check and see if you are bolt on or thread on clutch.
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Old 12-30-2012, 09:23 AM   #5 (permalink)
The_CableGuy
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Is this a "pull the radiatior job"???
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1999 C/K 3500 6.5TD, Extended Cab, Dually, Vin F,171,000 Miles on Body, 50,xxx on Engine, High Idle Mod, PMD Mounted In Front Bumper on Heat Sync, #9 resistor, Diamond Eye Turbo Back Exhaust....Mods to Come: 3 in 1 gauge with EGT,Trans Temp, Boost, Turbomaster, Fluidampr Harmonic Balancer
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Old 12-30-2012, 12:19 PM   #6 (permalink)
JMJNet
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Also cleaning the radiator and area around it should help.
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Old 12-30-2012, 01:45 PM   #7 (permalink)
handcannon
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It is not necessary to pull the radiator, but it is a good idea. Pulling the rad means less chance of damage to it when working on the fan/clutch/water pump (a piece of cardboard between the fan and rad would do the same). It also would give you the chance to have the rad checked at a shop for leaks and pressure tested. Also, it would give you the ability to clean out all the debris that collects in the cooling stack.

At minimum you will have to pull the upper rad shroud (easy) to access the fan/water pump area.

Don
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1983 Chev 1/2T pickup, 6.2 and 700R4 to become a heart transplant for my 1971 Toyota FJ 40

1994 Chev 3/4T heavy duty 6.5 TD 4X4 extended cab w/4.10 gears. turbomaster, intake snorkle removed, PMD relocated, OPS relay mod, all on headlights mod, Diamond Eye 3" down pipe and 4" exhaust, Glowshift gauges, homegrown version of feed the beast, TCC lockup mod.
Most recent mods are 2000 year model HO water pump, Heath low temp fan clutch, DMax 9 blade fan, 4X4 Posi-Lok.
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Old 12-31-2012, 11:22 AM   #8 (permalink)
The_CableGuy
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Anybody have a duramax fan on hand or have access to one?? i would pay you whatever you pay plus shipping.

Thanks
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1999 C/K 3500 6.5TD, Extended Cab, Dually, Vin F,171,000 Miles on Body, 50,xxx on Engine, High Idle Mod, PMD Mounted In Front Bumper on Heat Sync, #9 resistor, Diamond Eye Turbo Back Exhaust....Mods to Come: 3 in 1 gauge with EGT,Trans Temp, Boost, Turbomaster, Fluidampr Harmonic Balancer
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Old 12-31-2012, 02:39 PM   #9 (permalink)
handcannon
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go to Rockauto and get the AC Delco fan for a 2002 DMax. AC DElco #15010202, 15228374,1580920} Rockauto's #1580690. Rockauto price $43.79

Don
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1983 Chev 1/2T pickup, 6.2 and 700R4 to become a heart transplant for my 1971 Toyota FJ 40

1994 Chev 3/4T heavy duty 6.5 TD 4X4 extended cab w/4.10 gears. turbomaster, intake snorkle removed, PMD relocated, OPS relay mod, all on headlights mod, Diamond Eye 3" down pipe and 4" exhaust, Glowshift gauges, homegrown version of feed the beast, TCC lockup mod.
Most recent mods are 2000 year model HO water pump, Heath low temp fan clutch, DMax 9 blade fan, 4X4 Posi-Lok.
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Old 12-31-2012, 07:47 PM   #10 (permalink)
The_CableGuy
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Thanks I looked at advance and they had them for $120 And I was like no thank you
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1999 C/K 3500 6.5TD, Extended Cab, Dually, Vin F,171,000 Miles on Body, 50,xxx on Engine, High Idle Mod, PMD Mounted In Front Bumper on Heat Sync, #9 resistor, Diamond Eye Turbo Back Exhaust....Mods to Come: 3 in 1 gauge with EGT,Trans Temp, Boost, Turbomaster, Fluidampr Harmonic Balancer
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