Reply To: Jetfire HD Cooling System Rebuild?

Home Page Forums Discussion Topics – Ask the Experts Jetfire HD Cooling System Rebuild? Reply To: Jetfire HD Cooling System Rebuild?

#11590
62cutlassconvert
Participant

They were really doing things individually back then. I agree, much better for cruising. So if you don’t have a fan clutch you probably have a long water pump. My Cutlass had a downflow rad with no clutch and a 4 bladed fan. Both the Jetfires with fan clutches have a 7 blade 18″ fan and the very short clutch and the short pulley for the big hub. The difference between short and long WP, other than the big hub which I am not using, is only the length of the shaft and you need a short pulley since the shaft doesn’t stick out as far. I converted my Cutlass from the long pump/no clutch/4 blade fan to a short pump from D&D, a alum short pump pulley from D&D, and a Hayden 2765 fan clutch. Very tight to the rad with about 3/8″ spacing from clutch fin to rad. I then went to a Northern Alum crossflow rad and matching eng driven fan shroud, that you have to customize, and a 15″ Flexalite fan clutch fan(not a flexfan). You can use a Derale 17-18″ fan clutch fan since you don’t have the shroud setup. I believe the same setup will work for you and if no one has a good solution for the original fan clutch we will be using the set up, but using the stock crossflow rad, on the 2 Jetfires under restoration. I’ll take some pics and post my setup which is different than how the Jetfire will be done.

Recent Articles

Turbo System Safety Checks

Turbo System Safety Checks

The safety components of the factory designed turbo system have some interactive groups of safety "c...(read article)

Engine Front Drive Pulleys

Engine Front Drive Pulleys

The standard drive pulley has one groove. It drives the water pump/fan and alternator or generator. ...(read article)

1961-1963 F85 Car and Option Prices

1961-1963 F85 Car and Option Prices

Attached to this article is PDF file containing an extensive list of car and option pricing for 1961...(read article)

Recently Active Members

Profile picture of joe_padavano
Profile picture of bcroejuno-com
Profile picture of oaklyss
Profile picture of BruceM
Profile picture of graytoad

OldsJetfire Forum