| |
Click on image for the lowdown. 
====
| | | Forums66 Topics128,076 Posts1,055,920 Members48,429 | | Most Online14,466
Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
| | THANKS!
For helping keep this great
old truck web site
on the Internet for over 30 years! and not clogged down
with Ads!  Again, thanks!
| | | | Joined: Aug 2005 Posts: 71 'Bolter | | 'Bolter Joined: Aug 2005 Posts: 71 | Hi Guys ,I'm posting my mistake to help others avoid what happened to me .
I have to say complacency was a big factor here . I just did an engine swap for a guy on a 72 -C10 Chevy pickup . Straight 6 out V8 in .Well the 305 I used had a serpentine belt set up and there was no fan on the engine because they were going to use a electric fan on the truck we took the engine out of . I didn't want to go through the hassle to set up a electric fan . The bolt pattern was bigger than the one that was used on the 6 cylinder fan ,so off to the junk yard I went .I found a nice heavy duty six bladed flex fan with an adjustable bolt pattern , but couldn't find a spacer .Then it was off to the speed shop to buy a spacer . So I got home and installed all on the engine and fired it up . Strange it wasn't blowing any air ,the only air was coming off the blade tips.
Oop's, here is where complacency came into play.
This is the first time I really worked with a serpentine belt set up other than simple maintenance . On this serpentine belt set up the back side of the belt runs the water pump and fan so this means the engine turns clockwise but the water pump and fan turns counter clockwise .A standard V belt which I have been around most of my life all turns the same direction .So if you are going to use a stock Chevy serpentine belt set up you will need a reverse rotation fan and fan clutch and water pump made for this set up or you can order a reverse rotation fan that can be used with out a fan clutch like the one I mentioned above .
Not sure where to post this but maybe it should be put in tech tips or a sticky note here in the engine bay .
I hope this saves someone a bunch trouble that this caused me .
Paul N.
1948 Chevy 2 ton flatbed ex fire truck , and various motorcycles .
| | | | | Joined: May 2008 Posts: 10 Shop Shark | | Shop Shark Joined: May 2008 Posts: 10 | Thanks Paul ...
That is a good tip that could save a lot of time ...
Jim | | | | | Joined: Mar 2010 Posts: 10,275 Renaissance Man | | Renaissance Man Joined: Mar 2010 Posts: 10,275 | Thanks Paul, I was just about to make your very same mistake.
Carl
1952 5-window - return to "as built" condition | 1950 3100 with a 235 and a T-5 transmission
| | | | | Joined: Feb 2004 Posts: 29,777 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,777 | I encountered the opposite situation on a 63 Chevy II that the auto body shop instructor at the high school where I worked had restored. The car would run OK at low speed, and overheat on the highway. I discovered he had installed a fan blade from a Chevy Vega, which had a counter-rotating fan. At highway speed, the pusher fan would stop airflow through the radiator, but it would push air through it at around-town speeds.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
| | | | | Joined: Mar 2005 Posts: 1,636 'Bolter | | 'Bolter Joined: Mar 2005 Posts: 1,636 | Had the same thing happen to a man in town whose fan clutch had gone out.
He went to a wrecking yard to get another. Put it on and it would cool around town, but not on the highway.
When he finally brought it to me, I had him start the engine and it was trying to push me away from the front of the truck.
His was a serpentine set up, the clutch and fan he picked up were from a standard V belt set up.
| | | | | Joined: Dec 2001 Posts: 14,522 Moderator: Welcome Centre, Southern Bolters, Legion Hall | | Moderator: Welcome Centre, Southern Bolters, Legion Hall Joined: Dec 2001 Posts: 14,522 | Even though I think the original PO question has been answered I think this would be a good time to mention this.....
I used a 4.3 V6 brackets to bolt to the front of my 305 engine so I could run a serpentine belt. I had to buy a pump for the V6 and put it on my 305 as it turns in reverse with the serpentine system.
Hope this is a tip worth sharing. | | |
|
|
| |
