Clutch housing bolts?

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Evan Dutch

Evan Dutch

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Hey.
Can someone tell me the dimensions of the bolts that fasten the clutch assembly to the flywheel? Thanks.
 
Kinda depends on the pressure plate.

For sure the shoulder needs to go into the flywheel. If you have what they call the scalloped pressure plate it takes its own bolt. I used to know the part number off the top of my head, but no any more.

I'll grab a bolt for the scalloped plate and take some pictures in a bit and post them. If you have the scalloped plate and don't use the correct bolt (or try studs and nuts) you will fracture the cover. Learned that the hard way.
 
yellow rose said:
Kinda depends on the pressure plate.

For sure the shoulder needs to go into the flywheel. If you have what they call the scalloped pressure plate it takes its own bolt. I used to know the part number off the top of my head, but no any more.

I'll grab a bolt for the scalloped plate and take some pictures in a bit and post them. If you have the scalloped plate and don't use the correct bolt (or try studs and nuts) you will fracture the cover. Learned that the hard way.
Click to expand...
If it helps. I’m using the 440 source billet 130 tooth flywheel that will work with 10.5” clutch. This is the clutch kit I’ll most likely be using.

5E33B153-C76F-46A2-BFA3-675C90CC725F.jpeg
 
Dam I forgot to take those pictures today.

****. I'll do it first thing in the AM and I'll take a couple of shot of the pressure plate. That way you can see what I'm talking about.

For that pressure plate I think a shouldered bolt will be fine. The bolts I use would also work, but I need to get the part number. I started using those bolts exclusively after I cracked to pressure plate covers.
 
yellow rose said:
Dam I forgot to take those pictures today.

****. I'll do it first thing in the AM and I'll take a couple of shot of the pressure plate. That way you can see what I'm talking about.

For that pressure plate I think a shouldered bolt will be fine. The bolts I use would also work, but I need to get the part number. I started using those bolts exclusively after I cracked to pressure plate covers.
Click to expand...
Not a problem. Thank you.
 
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This is my personal junk. From the top:

The bolts designed for the scalloped pressure plate.
The next picture shows why you need that bolt. The shoulder is about to go into the cover and that's what centers the cover. The bolt shoulder centers the cover.
The next picture is a Borg & Beck/Long pressure plate that uses a scalloped pressure ring. This in a clutch done by Cale Aronson at Black Magic Clutches. Those are his fingers that he designed. And you can see I can also adjust for base pressure and counter weight.
The next three are pictures of what a sintered iron disc looks like. Some of what is being called a sintered iron disc is NOT site red iron. It's some bronze metallic **** we called Velvet-Touch or some **** like that way back in the day. You can see that this is an unsprung hub and has no way to even have a marcel spring.

This clutch is used in what was a 12.4X at 109.XX MPH street car. My wife can drive the car.

So...after all this, that's the bolts I use in the pressure plate. I had to think about it. When I bought my new flywheel I asked McLeod to throw in some new pressure plate bolts and they did. For free. So I don't have a part number, but you need a bolt with a long shoulder on it because that shoulder goes through the cover and into the flywheel to line everything up.

Hope this helps.
 
yellow rose said:
That lower bolt MIGHT work for a scalloped pressure plate but for damn sure not the top bolt.

I'm going to post some pictures here in a minute.
Click to expand...

FWIW, The "MP P4529113 kit" includes flywheel AND clutch cover bolts.
 
I appreciate the time you guys took to help me out.

I’ll have to work on finding the shouldered bolts.

Thanks.
 
Daves69 said:
FWIW, The "MP P4529113 kit" includes flywheel AND clutch cover bolts.
Click to expand...


Is the above picture screwing with me? Are you saying that's the MP kit and the top bolt is a flywheel bolt? Damn. My glasses ain't to good.


I will say I haven't used anything but Pro Series ARP flywheel bolts in I don't know how long.
 
yellow rose said:
View attachment 1715225124 View attachment 1715225126 View attachment 1715225127 View attachment 1715225128 View attachment 1715225129 View attachment 1715225130

This is my personal junk. From the top:

The bolts designed for the scalloped pressure plate.
The next picture shows why you need that bolt. The shoulder is about to go into the cover and that's what centers the cover. The bolt shoulder centers the cover.
The next picture is a Borg & Beck/Long pressure plate that uses a scalloped pressure ring. This in a clutch done by Cale Aronson at Black Magic Clutches. Those are his fingers that he designed. And you can see I can also adjust for base pressure and counter weight.
The next three are pictures of what a sintered iron disc looks like. Some of what is being called a sintered iron disc is NOT site red iron. It's some bronze metallic **** we called Velvet-Touch or some **** like that way back in the day. You can see that this is an unsprung hub and has no way to even have a marcel spring.

This clutch is used in what was a 12.4X at 109.XX MPH street car. My wife can drive the car.

So...after all this, that's the bolts I use in the pressure plate. I had to think about it. When I bought my new flywheel I asked McLeod to throw in some new pressure plate bolts and they did. For free. So I don't have a part number, but you need a bolt with a long shoulder on it because that shoulder goes through the cover and into the flywheel to line everything up.

Hope this helps.
Click to expand...
I’ll call McLeod tomorrow and see if they can send me some of those bolts.
 
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