SB64

How is this done, because I see no way of exposing the bearing or anything else, for example a 68/69 fan clutch. Anyone know how or what is done to restore them?
Roger

69L46vert

I'd be interested in how this is done too Roger. Here's an old post that might have some info. Rick

https://www.corvetteforum.com/forums...h-rebuild.html

SB64

The NCRS pointed me in the direction of the Americas Finest Corvettes web site. Their I found exactly what I need and they put the flange ifo you need on for $20. The clutch is $169. and is warrantied for a yr. So I am checking on that since all of the originals are twice that and all have to be rebuilt.
R

Alan 71

Hi,
There was an article in the NCRS RESTORER about restoring the Schwitzer
clutch in Vol. 33, Issue 4, Spring 2007.
It deals mainly with replenishing the reservoir with the proper amount of silicone oil.
This is a possible cure for a fan that 'free-wheels' and thus doesn't cool sufficiently.
Regards,
Alan

jeffstuarts

Alan,
How about a fix for one that has been restored and is way too tight?
Jeff

Alan 71

Hi Jeff,
According to the article the information from Schwitzer indicates the fill tolerance of the reservoir is 4ml.
So when refilling the reservoir you shouldn't add more than this amount at a time checking that the fan still free-wheels as it should after each 4ml.
The fan should stop after 3-5 revolutions if the reservoir is filled properly.
How does your fan's clutch act?
Regards,
Alan

jeffstuarts

Alan,
I removed the clutch from the car because it seemed to be fully engaged all the time and seemed to create a "howl". I put on a new GM replacement for the time being which is much freer when cold. I was told by another rebuilder that it is almost impossible to undo what has been done.
Jeff

Alan 71

Hi Jeff,
Access to the reservoir is through the 'actuator' which is 'button' shaped and located behind the bimetallic bar.
The article seems to say that the fluid in the reservoir can be increased or decreased through the opening in which the actuator seats.
I'm thus not sure what your other rebuilder is referring to.
What does the person who restored it originally have to say?
Regards,
Alan

jeffstuarts

Alan,
Thanks for taking the time to address this. I will go back and re-read that article. Truthfully, I never talked to the fellow who did the rebuild since it was done several years ago. I probably should anyway. I talked with another rebuilder who advertises in the NCRS Driveline. Thanks for your help.
Jeff

dugsgms74

I had a Hayden unit on my 68 that worked great and recently installed a "correct" unit from Ecklers. The "correct" unit seemed way too tight and was noisy all the time. Since then I've put about 100 miles on the car and while still no as quiet as the Hayden unit, it seems to be getting much better. Still a bit noisy at freeway speeds but seems to be getting better. On the upside, the "correct" unit does a much better job of keeping the water temp at a constant 180 degrees.