![]() |
Register or Log In To remove these advertisements. |
|
|
![]() |
|
Thread Tools | Display Modes |
![]() |
#1 |
Join Date: Jan 2003
Location: Modesto, CA
Posts: 1,321
|
Stock, our fans had a clutch on them, right?
Reading the Haynes Manual, and talking with people, it/they've said my truck needs a fan clutch. My fan runs continously off the belt. I put a thermometer in my radiator today, and it said 100º.
![]() |
![]() |
![]() |
![]() |
#2 |
Garage Queen Material
Join Date: Oct 2002
Location: USA
Posts: 4,129
|
my old stock fan had what looked like a clutch plate, but it always ran
|
![]() |
![]() |
![]() |
#3 |
Registered User
Join Date: May 2003
Location: Lake Oswego, Oregon
Posts: 1,028
|
i dont think just a fan would cool an engine by that much. but yes, they did come with clutch fans. i would first check your stat to make sure its not stuck open and not allowing the motor to reach a normal operating tempature.
__________________
Ken Morgan For fun: 1964 Volvo 122 For slow: 1984 Chevrolet C-10 For everything else: 1997 BMW M3 |
![]() |
![]() |
![]() |
#4 |
Garage Queen Material
Join Date: Oct 2002
Location: USA
Posts: 4,129
|
how would that fan clutch work? my fan was just hooked up with belts
|
![]() |
![]() |
![]() |
#5 | |
Registered User
Join Date: May 2003
Location: Lake Oswego, Oregon
Posts: 1,028
|
Quote:
__________________
Ken Morgan For fun: 1964 Volvo 122 For slow: 1984 Chevrolet C-10 For everything else: 1997 BMW M3 |
|
![]() |
![]() |
![]() |
#6 |
Senior Member
![]() Join Date: Feb 2004
Location: White Hall, AR
Posts: 316
|
I just recently had to replace my fan clutch because it wouldn't disengage. The faster I ran, the faster the fan turned, and all I got when I would get on it was a loud whirrrr from under the hood, and occasionally if I was really getting on it from about 30 mph, it would squeal the belt. All of my horsepower was going to the fan instead of the rear wheels.
![]() When I went to O'Reilly's to get a new one, they had a couple of different ones listed but told me that mine originally came equipped with the "heavy-duty" one. I think the difference is that some are thermal and some are not. The heavy-duty one that I bought is thermal, meaning that it will engage/disengage not only based on RPM but also by temp. Hope this helps... Mike ![]() |
![]() |
![]() |
![]() |
#7 |
Registered User
Join Date: Jul 2001
Location: Atlanta GA
Posts: 1,704
|
If it had A/C it got a clutched fan. Non A/C was direct drive I think.
A clutch is never a bad deal because when it's running cool enough the clutch will disengage and lower the darag on the motor. The thermostate contols the engine temp. if the engine is running too cool put a different thermostat in with a higher temp. Yeah I know it's ![]()
__________________
Grim-Reaper 70 Pontiac LeMans Sport Convertible, worlds longest resto in progress Looking for 71-72 2wd Blazer or Jimmy Project |
![]() |
![]() |
![]() |
#8 |
Registered User
Join Date: Jun 2004
Location: Tulsa, OK
Posts: 28
|
Well, 76sierraclassic, that's exactly what mine did the other day and it "freaked me out"... I don't know if you were in on that thread. (engine / drivetrain group). I was given a non-thermal clutch when i went to pick up the part yesterday. I think I want a thermal clutch though, cause it'll disengage when it's cool too, thus saving more power / gas for the wheels... (i guess). I will probably take it back today and get the thermal.
Not to threadjack, but my engine temp wire is pretty much deteriorated all the way back to the wire-loom at the firewall. can i run a new wire from the gauge (haven't taken that stuff off yet so it might be a chore) to the sender or is it much more work than that? BillyJack Last edited by BillyJack; 07-21-2004 at 02:31 PM. |
![]() |
![]() |
![]() |
#9 |
Senior Member
Join Date: Mar 2003
Location: St robert Mo
Posts: 2,001
|
The fan clutch is either thermal or by rpm.
The thermal will disengage by temp and the none thermal will disengage by rpm. I am pretty sure all our trucks used a clutch of some kind.
__________________
1968 c10 lowered 3" 4" 355/Th400 built by Hatfield racing in joplin MO |
![]() |
![]() |
![]() |
#10 |
Stepsides RULE
Join Date: Jul 2004
Location: Pineville, LA
Posts: 1,921
|
![]()
Yeah my truck runs real cool
![]() ![]()
__________________
1981 Chevy C10 Custom Deluxe Stepside 350 V8, headers, side exhausts, 3-speed auto SOLD 1980 Chevy C10 Custum Deluxe Stepside 305 V8, Edelbrock Performer Intake, Edelbrock 1406 600CFM 4-barrel, TH350C. Bent rod. SOLD 1984 GMC Sierra Classic Longbed 6.2L Diesel SOLD 2009 Kawasaki KLX-250S too many mods for this signature 1999 Honda Accord EX 4-cylinder, 17" Motegi Wheels 215/45/17 Sumitomo tires, Tein S-Tech lowering springs, KYB GR2 shocks, Acura TL 20mm rear swaybar, debadged, blackhoused headlights, Short-Ram Intake Cardomain of the Accord |
![]() |
![]() |
![]() |
#11 |
california fill
Join Date: Apr 2004
Location: Sunny So-Cal
Posts: 694
|
Grim is correct, every non-ac truck Ive seen have had no clutch. AC=clutch
pc |
![]() |
![]() |
![]() |
#12 | |
Registered User
Join Date: May 2003
Location: Lake Oswego, Oregon
Posts: 1,028
|
Quote:
__________________
Ken Morgan For fun: 1964 Volvo 122 For slow: 1984 Chevrolet C-10 For everything else: 1997 BMW M3 |
|
![]() |
![]() |
![]() |
#13 |
california fill
Join Date: Apr 2004
Location: Sunny So-Cal
Posts: 694
|
well in the '70's this was definately true. The only other possible explanation was that manual trans trucks had non-clutch fans..
ive seen many non-ac trucks with solid mounted fans, but they all also happened to be manual transmission trucks. coincidence? maybe. every clutch-having truck that Ive seen have had an automatic and AC... coincidence? maybe. And Ive seen and owned a lot of very very original trucks. Did the ruleset change during the 18-year run of this bodystyle? undoubtedly. Tims truck is a '75 and i believe grim's and mine assessment to be true pc |
![]() |
![]() |
![]() |
#14 | |
Registered User
Join Date: Jul 2001
Location: Atlanta GA
Posts: 1,704
|
Quote:
![]() Seroius. The Deisel trucks had the bigest radiator. It's wider then the whole in the core suport so the main suport on either side of opening. THe one on the driveside is swiss cheese to alow air flow for the wider radiator. It will bolt into your trick with the correct retaining bracket. You want a K5 with 1 ton axles? You gt a D60 out of a K30 and bolt it in. Get a SRW 14 bolt and bolt it in. You don't have to make GM parts fit a GM truck. ![]()
__________________
Grim-Reaper 70 Pontiac LeMans Sport Convertible, worlds longest resto in progress Looking for 71-72 2wd Blazer or Jimmy Project |
|
![]() |
![]() |
![]() |
#15 |
Registered User
Join Date: Jul 2001
Location: Atlanta GA
Posts: 1,704
|
Ohh it doesn have to even be the same body style. either on some stuff. The complete front 2wd sub assembly from a 87 will bolt into a 63 with only two holes needing to be drilled. All these folks buying these expensive kits to convert 70 and older trucks to disc front do it the hard way if they don't care about rims. They just need to hit a junk yard and get the front fram from fire wall out. That gets them the disc CV all the hard lines and a sway bar and it will all bolt onto their older frame.
![]()
__________________
Grim-Reaper 70 Pontiac LeMans Sport Convertible, worlds longest resto in progress Looking for 71-72 2wd Blazer or Jimmy Project |
![]() |
![]() |
![]() |
#16 |
Stepsides RULE
Join Date: Jul 2004
Location: Pineville, LA
Posts: 1,921
|
no no no, all i ment in "making it fit" was that he had to cut that bracket or something. darn you guys need to quit jumping down my throat. sorry that im only 16 and im just going on what my dad said years ago on things he did years ago.
![]()
__________________
1981 Chevy C10 Custom Deluxe Stepside 350 V8, headers, side exhausts, 3-speed auto SOLD 1980 Chevy C10 Custum Deluxe Stepside 305 V8, Edelbrock Performer Intake, Edelbrock 1406 600CFM 4-barrel, TH350C. Bent rod. SOLD 1984 GMC Sierra Classic Longbed 6.2L Diesel SOLD 2009 Kawasaki KLX-250S too many mods for this signature 1999 Honda Accord EX 4-cylinder, 17" Motegi Wheels 215/45/17 Sumitomo tires, Tein S-Tech lowering springs, KYB GR2 shocks, Acura TL 20mm rear swaybar, debadged, blackhoused headlights, Short-Ram Intake Cardomain of the Accord |
![]() |
![]() |
![]() |
Bookmarks |
|
|