overheating with ac on ALL READY!!!

[vp277]

+1. Had the same issue last summer, replaced the clutch (AISIN FCG003 FCG-003@X09 from rockauto), kept the original fan. No signs of overheating, even in traffic with AC on when temp is in the 90s. The only complaint is that the fan is noiser than before, but I can live with that...

[vxfocus]

ok pulling the electric fan,sucks because i really noticed a better throttle response..
my old clutch is seized up so i will have to get a new one,good idea anyway as i read on line that fan clutch will lose rpms each year so seeing that the clutch is 15+ years old prolly needs replaced even if it wasnt seized up
thanx everyone for all the input,you guys saved me alot off time and aggravation
ill let ya know how it works out

[VX KAT]

Back in 2001-2012 MANY of us VX owners were having the same overheating problem...went thru the steps you did, including the RD racing radiator, but many (myself included), found out it was the fan cluth and the fan blade. Isuzu redesigned the fan blade too.
This thread is in second link eternal21 listed in post above:
http://www.vehicross.info/forums/sho...avis+fan+blade

[vxfocus]

ok new clutch installed with old fan blades
no overheating at all but load as hell!!!

[ohiovx]

I'm sure it cools with the fan clutch! But I'm with you that clutch SUCKS horse power from what little HP these engines have! It seems no one looks at my posts.
Electric fans will work, but it's not cheap! or universal. You can't just buy a fan & attach it & expect it to work. It has to have a formed shroud for the radiator to cool properly.

[vxfocus]

mine did have a shroud and still didnt work

[eternal21]

ok new clutch installed with old fan blades
no overheating at all but load as hell!!!

Excellent! Turn up the music, you won't hear a thing

Electric fans will work, but it's not cheap! or universal. You can't just buy a fan & attach it & expect it to work. It has to have a formed shroud for the radiator to cool properly.

I have a Ron Davis radiator and a Ron Davis custom fabricated shroud made specifically *for that radiator* with dual high flow electric fans and it still overheated.

If there's a huge concern over the loss of the couple hp, just pick up a cold air intake or run a high flow (200 cel) cat.

[ohiovx]

I'm not trying to be a jerk here guys, but if you have cooling problems with an electric fan & put a stock mechanical fan back on & it cools. That tells you it has nothing to do with the radiator. There was either an issue with the electric fan not flowing enough cfm, OR the fan & shroud are not matched to the radiator properly. If you get an electric fan that pulls enough air & a shroud like mine, it will pull just as much air through the radiator as a stock fan with a clutch.

Don't know who Ron Davis is by the way.

[vxfocus]

i kinda figured the the electric fan wasnt pulling the same amount of cfm's as the clutch fan,but ffdynamics wanted to know my vehicle info to size the right fan..
i would like to go back the the electric fan if i could find the right one
anyone know what cfm rating the stock fan is rated at??

[VX KAT]

I'm not trying to be a jerk here guys, but if you have cooling problems with an electric fan & put a stock mechanical fan back on & it cools. That tells you it has nothing to do with the radiator. There was either an issue with the electric fan not flowing enough cfm, OR the fan & shroud are not matched to the radiator properly. If you get an electric fan that pulls enough air & a shroud like mine, it will pull just as much air through the radiator as a stock fan with a clutch.

Don't know who Ron Davis is by the way.

Ron Davis Racing Radiators, in Phoenix, AZ. Fast & Loud (TV show about Dallas based custom shop) uses RD radiators in all their builds.

No, don't think you're being a jerk at all, we're glad it's working for you
It's just several owners here have tried various electric fan set ups, without success. Eternal21 initially said he had good results with his (Post #92), but has posted in this thread above that it didn't end up solving it either. So your experience appears to be different than most others here that have tried it.

I personally discussed it at length with the guru at Ron Davis, as I wanted to consider getting one, but he specifically advised against it and thoroughly explained his reason (in post #89). I even said I would get the custom made shroud if it would help with the electric fan set up. He didn't think it would.


Another thing to note, is that during 2010, 2011 it seemed numerous owners here were reporting the same problem of overheating. Myself included. After many new radiators, both stock and RD Racing, and several electric fan installs, most still had the o/h problem. It seems that almost all of these owners eventually replaced the OEM FAN CLUTCH and it resolved the problem! Some tried non-OEM and reported they didn't work very well, but o/h resolved when an OEM was installed (VXorado),


Here's the threads on the RD radiators in VXs and electric fans:
The RD Racing Radiator increased cooling capacity by about 1/3.

• RD Aluminum racing Radiator build thread for Newthings and VX KAT
  http://www.vehicross.info/forums/sho...ight=ron+davis

• See post #4:
  http://www.vehicross.info/forums/sho...ight=ron+davis

• See Posts #73 and #89 and #92 for comments Ron Davis RR made specifically about electric fan set ups:
  http://www.vehicross.info/forums/sho...ight=ron+davis

I just like looking at this gorgeous piece of work!

[eternal21]

i kinda figured the the electric fan wasnt pulling the same amount of cfm's as the clutch fan,but ffdynamics wanted to know my vehicle info to size the right fan..
i would like to go back the the electric fan if i could find the right one
anyone know what cfm rating the stock fan is rated at??

I've already been through an FFDynamics as well. Worked well, but off-roading, the temp would start to creep to the point where I didn't want to chance it.

[VXorado]

Mine was also a FFDynamic fan... hmmm, maybe it's just an FFD issue? Inadequate CFM like OhioVX stated.

I noticed my engine temp was creeping up on the interstate at 75 MPH cruising with the outside temp only in the 70's. I didn't want to chance keeping it installed for the summer and risk getting stranded.

I'd like to go back to a electric fan as the throttle response was noticeably better.

[tom4bren]

I'd like to go back to a electric fan as the throttle response was noticeably better.

0.01% more noticeably better

I worked the math in my head one day on my commute from hell. T'ain't much.

[siemprelisto]

Just wondering what a used Ron Davis radiator and shroud would sell for...

[eternal21]

Just wondering what a used Ron Davis radiator and shroud would sell for...

Can't comment on the radiator, but that's one mod I don't mind having. If you're interested in a RD shroud w/dual electric fans, hit me up. I have the receipt around here somewhere and can get pics if you'd like.