Clutch fan installation question

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Kenflo

Kenflo

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About to install the Hayden 2947 clutch and wondering what others have used for the mounting hardware?
Are locking washers necessary on the clutch to water pump pulley bolts? Or is it OK to use flat washers and some blue loctite on the threads?
 
Having done this a few times, getting the clutch to water pump bolts started was a struggle! But the resulting spacing once installed was perfect. Don't forget the brass sleeve that centers the water pump nub in the clutch hole.
 
Lock washers, if you have the room, & you should, are all I've ever used & never had a problem. Loctite COULD make it difficult to remove the bolts & nuts (clutch to fan & fan assembly to water pump) later down the road if you need to. Just my opinion.
 
I made my own studs and used red Loctite to hold them in place. I cut the studs to short so I used blue Loctite on the nuts. If I had measured correctly, I could have used a lock washer.

1713005961087.jpeg
 
Honestly being able to remove the radiator to get the fit better and use studs is best.
I personally have used bolts and flat washers and lock washers because if the locks split at the oval hole… they don’t do their job. Also, small side tip- buy all the hardware from the same manufacture. Don’t miss match hardware. Spinning weight is a real cause of vibration and wear out your water pump / clutch over time. Good luck!
 
Syleng1 said:
Honestly being able to remove the radiator to get the fit better and use studs is best.
I personally have used bolts and flat washers and lock washers because if the locks split at the oval hole… they don’t do their job. Also, small side tip- buy all the hardware from the same manufacture. Don’t miss match hardware. Spinning weight is a real cause of vibration and wear out your water pump / clutch over time. Good luck!
Click to expand...
I agree having the radiator out of the car is absolutely the best way! I have noticed how the lock washer splits in the oval hole as well, I will try and see if I can get the lock washer on along with a flat washer to cover the oval hole today, if not I believe I will be using the blue loctite with a single flat washer.
 
So I was able to fit a 5/16x1" bolt with a flat washer and lock washer. This would be near impossible to do with the radiator in place though. Thanks for the tips guys!

IMG_3211.jpeg
 
I've done this 3 times in a 2 day span.
I have 1" 5/16" bolts with captive washers to use. They are OEM Chrysler/Mopar from one of the many cars that I have parted out over the years. No lock washers, no Locktite, just adequate torque to tighten and they stay that way. I use a long 1/2" combination box end wrench after fingering them to start the threads. There are a series of 1/4 turn efforts on each bolt so it takes awhile. This is with a 7 blade fan too. Those have a slightly irregular fan spacing where there are a few sections where the fan blades are slightly further apart. I took off a 6 blade fan that was evenly spaced. That made access to the fan clutch bolts difficult.

Hayden 5.JPG


It helps to thread one bolt in 2-3 turns, then slip the fan and clutch onto it, then thread the one across from it to hold it in place.
 
Kern Dog said:
I've done this 3 times in a 2 day span.
I have 1" 5/16" bolts with captive washers to use. They are OEM Chrysler/Mopar from one of the many cars that I have parted out over the years. No lock washers, no Locktite, just adequate torque to tighten and they stay that way. I use a long 1/2" combination box end wrench after fingering them to start the threads. There are a series of 1/4 turn efforts on each bolt so it takes awhile. This is with a 7 blade fan too. Those have a slightly irregular fan spacing where there are a few sections where the fan blades are slightly further apart. I took off a 6 blade fan that was evenly spaced. That made access to the fan clutch bolts difficult.

View attachment 1716236359

It helps to thread one bolt in 2-3 turns, then slip the fan and clutch onto it, then thread the one across from it to hold it in place.
Click to expand...
i was gonna crack wise about you not having a fan blade bolt tool, but seeing how short that clutch drive is, a wrench is the only viable option there!

same same on the fasteners. i've always found going back to the bolt bin yielded the best possible hardware for that application. and also the lesson of never throw anything out.
 
Kern Dog has it right and do not use locktite, you will regret it the next time that you work on it. There will be a next time.
 
Kern Dog said:
I've done this 3 times in a 2 day span.
I have 1" 5/16" bolts with captive washers to use. They are OEM Chrysler/Mopar from one of the many cars that I have parted out over the years. No lock washers, no Locktite, just adequate torque to tighten and they stay that way. I use a long 1/2" combination box end wrench after fingering them to start the threads. There are a series of 1/4 turn efforts on each bolt so it takes awhile. This is with a 7 blade fan too. Those have a slightly irregular fan spacing where there are a few sections where the fan blades are slightly further apart. I took off a 6 blade fan that was evenly spaced. That made access to the fan clutch bolts difficult.

View attachment 1716236359

It helps to thread one bolt in 2-3 turns, then slip the fan and clutch onto it, then thread the one across from it to hold it in place.
Click to expand...
What is a "captive" washer?
 
There are numerous bolts used in cars that have a built in washer that does not come off. There may be another name for them, I called them captive washers because they don't leave the bolt.
Every bolt retaining a fender has a built in washer. Every bolt to mount a valance does too.
If I had a picture, I'd gladly post it.
 
Kern Dog said:
There are numerous bolts used in cars that have a built in washer that does not come off. There may be another name for them, I called them captive washers because they don't leave the bolt.
Every bolt retaining a fender has a built in washer. Every bolt to mount a valance does too.
If I had a picture, I'd gladly post it.
Click to expand...
I see what your saying now, so not necessarily a locking washer but more of a built in washer. I did a quick search and seems they may be hard to find, I may just stick with the grade 8 bolt with flat and locking washer for now
 
Here is one.


943D3F4D-8218-420D-BF8B-4D886282D825.jpeg


72D719C9-322C-447C-BF2A-1B926C039BC1.jpeg


These are all over the 67-76 A body cars. Hood, trunk lid, doors and fenders.
I like to use this type for the intake and bell housing too.
 
If you are young or flexible, threading the nuts or bolts into place isn’t difficult.
I’m not arthritic like some but I just can’t bend my wrists enough to easily thread a bolt in the tight confines of the stubby fan clutch. I get it done but it isn’t easy. The longer snout of the standard fan clutch is SO much easier for me.
 
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