924Board.org

jerseyben · Joined: 05 Apr 2010 Posts: 22 Location: USA

Please delete.

TJC · Posted: Fri Jun 04, 2010 12:12 am Post subject:

The hub/front rotor assembly must be taken off as the bolts securing the rotor to the hub are on the "inside". The torque value is 17 foot pounds. This is a good time to buy front seals and re-pack the front wheel bearings.

I think you may still purchase the pins from Porsche, alternatively check online at Pelican, Az autohaus, etc. Worse comes to worse try scoring some from a member here or a 944 forum.

I'd first measure the inside "brake drum" diameter of the old and new rotors to see if they are the same. Make sure the contacting friction surfaces (NOT the linings) of the parking brake shoes to backing plate are properly lubricated and that the shoes are centered on the backing plate. Make sure the parking brake is properly adjusted as there should be no pre-load on the cable. Make sure the new rotors are fitting flush on the hub and not in a bind. The torque value for the screws that hold the rotor to the hub is 3.7 foot pounds. The caliper bolts should be torqued to 63 foot pounds.

It's a start, hope this helps!
_________________
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'87 Porsche 944 NA... "Liebchen"
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Still on the Prowl!

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Rasta Monsta · Joined: 12 Jul 2006 Posts: 11733 Location: PacNW

You may have to relax the cable in order to set up your new rear discs. This is done at the handbrake lever. . .loosen the locknut, then turn the threaded tube to loosen.

Brake hardware kits are a bit spendy, but necessary. I would plan on buying four.

You should also plan to disassemble the calipers completely, and remove all the rust from both parts (sliding frame, and mount). Reassemble with a light coat of high temp grease on the sliding rails, and make sure the assembly moves freely. The rear calper has a plastic "helper" on the slide that is probably missing, and which I believe you can only get with a rear seal kit (which are cheap).
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Toofah King Bad

WeiBe (1987 924S 2.5t) - 931 S3

gohim · Joined: 02 Nov 2002 Posts: 4459 Location: Rialto, CA

Not sure how brake hardware is sold anymore, but used to be Porsche sold the individual pieces, axle sets were available (and brake hardware was included with brake pads sets (discontinued for years). Axle sets were about $65-$75 each. Individual pieces (pins, clips, springs) run from $8-$15 each.

The plastic friction sliders are only available with the seal kits. Seal kits run $15-$25 each (a kit does one caliper).

Assembly calipers using brake fluid (messy) or silicone brake assembly grease. Do not use wheel bearing grease on the insides of the calipers (can use on the slider surfaces).

There are machined steps on the brake piston contact surface. The step MUST BE adjusted to contact the back of the brake pad at a specific angle to the ground/horizontal (I think it's 20 degrees). I made a jig out of a piece of a poly plastic cutting board to set the angle when I'm rebuilding brake calipers. Angling the "step" on the brake caliper pistons helps initial braking by putting "toe-in" the brake pads in, so they pull themselves onto the rotors.

jerseyben · Joined: 05 Apr 2010 Posts: 22 Location: USA

Ok. I will try loosening the brake cable.

Does anyone have 2 good sets of caliper pins (rear) they could sell me, please?

gohim · Joined: 02 Nov 2002 Posts: 4459 Location: Rialto, CA

I found the hardware sets at a Seller that I order VW Parts from instead of the VW Dealer. Prices are very good, quality is excellent, Customer Service is good, and ground shipping is free on orders over $50.

This is autohausaz.com

Makes > 1984 Porsche > 944 > Brake & Wheel Hub > Brake Hardware Kit

Part Number Brand / Description / Restrictions List Core Your Price Qty Select

94435195201
ATE
Brake Hardware Kit; Front Pad Mounting Hardware
Kit includes 4 retaining pins, 2 spring clips, 4 securing clips, and 2 retaining springs. 1 kit per car. $73.66 $57.33

$60.35
SALE

94435295200
Porsche (OE)
Brake Hardware Kit; Rear Pad Mounting Hardware
Kit includes 4 retaining pins, 2 spring clips, 4 securing clips, and 2 retaining springs. 1 kit per car. $78.08 $58.92

$62.02
SALE

jerseyben · Joined: 05 Apr 2010 Posts: 22 Location: USA

Please delete.

gohim · Joined: 02 Nov 2002 Posts: 4459 Location: Rialto, CA

You're obviously very inexperienced in general automobile maintenance from the questions that you are asking. I suggest that you buy the Porsche Factory Service Manual for your car, along with the Haynes Service Manual.

The Haynes Manual is pretty worthless, but it does cover some general service automobile information that you may not find in the Factory Service Manual.

Wheel hubs with loose/tapered bearings are not torque to spec. They're tightened to feel/visual. You need some experience adjusting and tightening wheel with loose/tapered bearings to get this right.

Buy the manuals, read the related sections. Practice before final adjusment and closing up.

TJC · Posted: Sat Jun 05, 2010 11:43 am Post subject:

bcblase · Joined: 23 Oct 2007 Posts: 574 Location: Winchester, VA

The front rotors can be removed without removing the hub, but only if the front dust shields have been removed. The first time I disassembled my front hubs to change the wheel bearings, I removed the dust shields.

When you remove the hub/rotor from the spindle, the front dust seal will come out with the hub, and maybe the outside bearing.

The spindle nut needs to be hand-tightened so that the thrust washer is barely loose against the bearing. Read about it here:

www.clarks-garage.com

Brad
_________________
1987 Porsche 924S - track toy
1986 Mercedes 190E 2.3-16v - autocross
2007 F-150 5.4L Lariat Supercrew - tow beast
1994 Volvo 850 Race Wagon - 24 Hours of Lemons Car
2001 BMW 325xi - daily driver