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Re: Big block clutch fan
[Re: Montclaire]
#1265144
07/10/12 01:05 PM
07/10/12 01:05 PM
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Joined: Feb 2003
Posts: 10,198
Someplace you aren't
SomeCarGuy
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I Live Here
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Posts: 10,198
Someplace you aren't
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91 Jag clutch from NAPA. Somebody else might remember the part numbr or exact model. I used it before and it is the shortest I could find.
I want my fair share
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Re: Big block clutch fan
[Re: 3hundred]
#1265146
07/10/12 01:39 PM
07/10/12 01:39 PM
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Joined: Feb 2003
Posts: 7,982
Scranton, PA
Montclaire
master
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master
Joined: Feb 2003
Posts: 7,982
Scranton, PA
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Also, I would say that the relationship of the fan blade to the shroud is more important than the clutch face to the radiator (if greater than 1/4 inch, less is a big deal as the engine will rock on the mounts, esp with a stick). Seating the fan at the proper distance in relation to the shroud opening will help to guarantee good air flow.
Last edited by Montclaire; 07/10/12 01:57 PM.
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Re: Big block clutch fan
[Re: RSNOMO]
#1265151
07/10/12 01:54 PM
07/10/12 01:54 PM
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Joined: Feb 2003
Posts: 7,982
Scranton, PA
Montclaire
master
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master
Joined: Feb 2003
Posts: 7,982
Scranton, PA
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Why are you making him waste money on another clutch? What you have should work fine, just fix it. This is the mopar kit, correct?
Last edited by Montclaire; 07/10/12 01:56 PM.
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Re: Big block clutch fan
[Re: Montclaire]
#1265153
07/10/12 04:30 PM
07/10/12 04:30 PM
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Joined: Jan 2003
Posts: 74,964
U.S.S.A.
JohnRR
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Quote:
The mounting block that is pressed onto the water pump shaft can be set at different depths, obviously yours is out too far. You may need to play around with it a bit but you should be able to mount that fan w no issues.
If this were the case then he would have an issue I would think with BELT ALIGNMENT ...
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Re: Big block clutch fan
[Re: Montclaire]
#1265156
07/11/12 10:09 AM
07/11/12 10:09 AM
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Joined: Jan 2003
Posts: 74,964
U.S.S.A.
JohnRR
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I Win
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Quote:
Quote:
Quote:
The mounting block that is pressed onto the water pump shaft can be set at different depths, obviously yours is out too far. You may need to play around with it a bit but you should be able to mount that fan w no issues.
If this were the case then he would have an issue I would think with BELT ALIGNMENT ...
Yes and no. He hasn't posted any pics, so it's hard to comment further, but a simple tweak on the press and maybe a wp pulley swap and he should be fine, but if it's the mopar fan there is no reason for it not to work. A lot can change on a car in 40+ years. The flat AC pulley should pick up a ton of room for you and they're easy to find.
If I'm reading this right he CHANGED the fan assembly off something that has been running for sometime , he makes no mention of belt alignment issues, so I don't even think that is an issue here.
Bob , MP has the wrong height unit in their kits and they KNOW it ... why do they still sell it then ????
Zippy, WTF ???? When is MP going to stop pushing GARBAGE on loyal customers ???
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Re: Big block clutch fan
[Re: JohnRR]
#1265157
07/11/12 11:19 AM
07/11/12 11:19 AM
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Joined: Jan 2003
Posts: 17,840
S.E. Michigan
ZIPPY
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Not sure what you're going off about since the clutch in the P4120758 kit has NEVER fit a 68 to 70 b body big block car at any point in it's history. It has always been too long for that application, nothing has changed. I tried it back in 1999 and it did not fit my car back then, and there is no reason to believe it will fit in 2012 either  In 1999 it was 3 and 1/4" long. In 2012, it is still 3 and 1/4" long. The clutch assy was originally sourced from a 6 cylinder van application, and was chosen for minimal HP loss....not based on cooling capability, and certainly not on the ability to fit any specific years or models.
Rich H.
Esse Quam Videri
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Re: Big block clutch fan
[Re: ZIPPY]
#1265158
07/11/12 12:33 PM
07/11/12 12:33 PM
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Joined: Jan 2003
Posts: 74,964
U.S.S.A.
JohnRR
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Quote:
Not sure what you're going off about since the clutch in the P4120758 kit has NEVER fit a 68 to 70 b body big block car at any point in it's history. It has always been too long for that application, nothing has changed.
I tried it back in 1999 and it did not fit my car back then, and there is no reason to believe it will fit in 2012 either
In 1999 it was 3 and 1/4" long.
In 2012, it is still 3 and 1/4" long.
The clutch assy was originally sourced from a 6 cylinder van application, and was chosen for minimal HP loss....not based on cooling capability, and certainly not on the ability to fit any specific years or models.
Thanks for the response Rich and telling us what the original source was, I have never used that kit but the thought has crossed my mind on it.
now I'll ask the really STUPID question , What did MP think people were going to use it in if the parts were sourced from a 6cly.VAN application ??? I have a 2002 MP catolog here , it's listed in the HEMI section, the Big block section , and the smallblock section all with the same part number of P4120758.
Description is as follows ...
Quote:
Most 60's and early 70's factory-built MUSCLE CARS were equipped with viscous fans for cooling purposes. Engineers have determined through dyno-testing that this viscous fan is the best replacement package. It provides thermostatically-controlled cooling, includes a lightweight balanced fan and takes the least amount of horsepower from the engine. Offers up to 15 horsepower gain on typical high performance V8s.
Has the description changed because it sure sounds like they are marketing it toward a specific years and models.
Seems like the bean counters took over ... again ... lets clean out existing stock of obsolete parts and sell them ... with no warranty of fitment ... to those dumb enough to buy MP parts .
This isn't directed at you Rich and it's great that someone like you is available to give us the lowdown  , but I'm having a hard time waving the MP flag , yes I do buy their parts and recommend them when they fit the need for others , when they keep pulling crap like this ...
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Re: Big block clutch fan
[Re: JohnRR]
#1265160
07/11/12 01:11 PM
07/11/12 01:11 PM
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Joined: Jan 2003
Posts: 17,840
S.E. Michigan
ZIPPY
I Live Here
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I Live Here
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S.E. Michigan
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It was chosen from that application.... Quote:
....for minimal HP loss....
Per the fellow involved with setting up the part number, it was the clutch that slipped the most, and reduced dyno hp the least out of the huge pile of them that were tested.
Works fine on 71-up b bodies, e bodies, small block A bodies, and that's about all that I know of.
Rich H.
Esse Quam Videri
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