Clutch and pressure plate. - Team Camaro Tech
Engine General Engine Discussion.

 
LinkBack Thread Tools Display Modes
post #1 of 5 (permalink) Old Apr 29th, 04, 05:50 AM Thread Starter
Gold Lifetime Member
Gary
 
69Z28's Avatar
 
Join Date: Oct 2000
Location: Delaware
Posts: 3,324
Post

It's been a very long time since I bought my last clutch and pressure plate (probably 25 years). I just removed a 3000 mile fresh 350 from my 69 Z to drop in the 302 and found a brand new 11" set up. The pressure plate is purple, diaphram style and the clutch disc has 10 triangular pads on both sides of it. Never seen anything like this before. Is this a decent set up? I have lauched pretty hard a few times and it seem to hook up very well.


At the very least shouldn't there be lock washers on the bolts that hold the pressure plate on? All but one had flat washers.

And that's not the end...I have only put maybe 1000 miles on this car in 3 years with the 350 and there was always a vibration. I did all kinds of things to find out what it was from and I found out this morning there was no pilot bushing in the crank. Mind you this was a fresh built and balanced engine as was told to me by the person I bought it from. He claimed it was done by a professional. "DOAH" [img]graemlins/clonk.gif[/img]

Lastly, what should the bolts be torgued to when I put the clutch back on? [img]graemlins/beers.gif[/img]

06A 1969 Camaro Z28 X33D80 69 B 711 Black Stripes Console w/tach and gauges.
69Z28 is offline  
Sponsored Links
Advertisement
 
post #2 of 5 (permalink) Old Apr 29th, 04, 06:56 AM
Senior Tech
 
Join Date: Apr 2000
Location: holliston, mass
Posts: 622
Post

The only purple plates I remember were made by Zoom, (Perfection Hi-Test). The weren't the best out there, but were certainly good units.

McCloed units are red
Centerforce's are orange
Hays' are gold in color

Be sure to use the correct pressure plate bolts and a lock washer on each... (Mr. gasket offers a skin pack)


torque on the bolts is 35#
chevy torque specs

Hope this is helpful

John...
68ragtop is offline  
post #3 of 5 (permalink) Old Apr 29th, 04, 07:16 AM
Gold Lifetime Member
John
 
Vintage 68's Avatar
 
Join Date: Mar 2002
Location: Moraga,Ca.,USA
Posts: 13,705
Post

Quote:
Originally posted by 69Z28:


'The pressure plate is purple'

'At the very least shouldn't there be lock washers on the bolts that hold the pressure plate on? All but one had flat washers. '

And that's not the end...I have only put maybe 1000 miles on this car in 3 years with the 350 and there was always a vibration. I did all kinds of things to find out what it was from and I found out this morning there was no pilot bushing in the crank.

Lastly, what should the bolts be torgued to when I put the clutch back on? [img]graemlins/beers.gif[/img]
Maybe it's a 'Purple Haze' clutch...

Seriously, many of the resellers will paint the clutch and pressure plate "their" exclusive color to disquise the original manufacturer (they can't possibly afford to tool to make every type clutch) - I don't think their trying to cheat anyone, they just do it to 'stand-out'.

Yes - there should be Lock Washers ( I prefer to use the "Star" type over the "Split" type ).
I also put a little squirt of 'Red' Locktite on each bolt as it inserted - I'm a 'belt-and-suspenders' kinda guy when it comes to these things...
The Bolts are 3/8x16x15/16. Use only "graded" hardware here - factory bolts are grade-5 but I usually replace with grade-8.
Torque to @35ftlbs - unless you use an ARP set, then torque to their spec. (don't remember what it is but remember it being different than stock)

'No pilot bushing' -
That is wierd - I usually run into them even being left in Auto-trans vehicles...
The rebuilder (engine) must have removed and forgot to ask the customer what trans he was going to run.
Bad rebuilder - Bad - go to your room...

Hope this helped - maybe some other "purple clutch" guy will chime-in on who made his...
(edit: thanks 68rag - I do remember now that 'Zoom's' were purple - we put one in my brother's p.u. back-in-the-day...)

John

ps: hey - I used to live in DE when I worked for 'Uncle Dupie' back in the 80's. Christianna to be exact - isn't Clayton south of there?

[ 04-29-2004, 09:36 AM: Message edited by: Vintage 68 ]

1968 Convertible
Some trucks
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Other V8 things - some of which float
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Other V6 things - none of which float
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Oh yeah, and 1 "Straight-Six" ...
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


If a man says something in the garage - and his wife can't hear him - is he still wrong !!!
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Vintage 68 is offline  
 
post #4 of 5 (permalink) Old Apr 29th, 04, 07:56 AM
Gold Lifetime Member
Robert
 
Join Date: Oct 2000
Location: Simpsonville, SC
Posts: 3,359
Post

I also think the Zoom pressure plates are purple. Seems like they went away for awhile and have recently made a come back. Might want to check the front bearing on the trans while it's out. That's got to be a strain on it without the pilot bushing.

Robert

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
355ci 10:1, 64cc Edelbrocks, Comp Mag 280H, Performer RPM, 700r4 (2000 stall), 3.55 posi A/C PS PDB Hotchkis

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
369ci 10.3:1, 64cc Edelbrocks, Voodoo 276/284, Performer RPM, Holley 650DP ...T56 Magnum, 3.73 Moser 12 bolt
TC member #18
rojo is offline  
post #5 of 5 (permalink) Old Apr 29th, 04, 03:50 PM Thread Starter
Gold Lifetime Member
Gary
 
69Z28's Avatar
 
Join Date: Oct 2000
Location: Delaware
Posts: 3,324
Post

Thanks for all the replies everyone.

Vintage68...you are correct. Clayton is about 40 minutes south of Christiana.

I found a Hayes decal stuck to the crank flange so I'm assuming the flywheel is a Hayes. There is a number and a date on the back of the flywheel that is engraved and has a sticker with SFI Foundation with the same number on it.

Thanks again. [img]graemlins/waving.gif[/img] [img]graemlins/beers.gif[/img]

06A 1969 Camaro Z28 X33D80 69 B 711 Black Stripes Console w/tach and gauges.
69Z28 is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Team Camaro Tech forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address.
NOTE we receive a lot of registrations with bad email addresses. IF you do not receive your confirmation email you will not be able to post. contact support and we will try and help.
Be sure you enter a valid email address and check your spam folder as well.



Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome