W108/9 4.5 vs 6.3 Rear Brake calipers - Mercedes-Benz Forum

 
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post #1 of 7 (permalink) Old 04-24-2013, 03:45 PM Thread Starter
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Date registered: Mar 2013
Vehicle: 1967 Fintail 230S
Location: Miami, FL
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W108/9 4.5 vs 6.3 Rear Brake calipers

does anyone know if the rear brake calipers are the same for a W108/9 4.5L V8 versus the 6.3L V8 rear brakes? I am buying a rusty 4.5 rear end, and the same junk yard has a 6.3 rear end with "aluminum" looking calipers. Wondering if it's worth buying those as well.

How about the brake pads?

thanks in advance for the advice.

PS - it's for my 230 Fintail

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post #2 of 7 (permalink) Old 04-24-2013, 06:56 PM
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109 018 from 003549 has same calipers then a 4.5
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post #3 of 7 (permalink) Old 04-25-2013, 05:50 AM Thread Starter
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Thanks Agillot.

As luck would have it, the 4.5 car with VIN is at the JY, but only the 6.3 axles; no VIN. I assume the VIN reference you gave above is for the 6.3s, right?

Is there a way to look at the calipers to know? The part # on the 4.5 calipers are rusted off. Also, JY in Miami are not too user friendly, so they may not want to trial fit the 6.3 caliper on the 4.5 axle.

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post #4 of 7 (permalink) Old 04-25-2013, 11:16 PM
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Vehicle: 1996 W210 E320 ELEGANCE, 1972 W108 280SE 3.5, 1969 W108 280S, 1971 300SEL 3.5
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If the 6.3 axle has vented discs it's from an early car, it will still bolt up but you will need the calipers and discs.


If the discs are solid, they are the same type as on your 4.5, either way they will still bolt up and work.

I know this because I needed to replace the rear calipers on my W108 and I bolted up a set from a W126 and they work fine. As far as I've been told the rear brakes from the mid 60's were the same till at least 1985 even the E brake hardware is the same.

Pads are the same as well. DB2

I hope this helps.
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post #5 of 7 (permalink) Old 04-27-2013, 04:02 PM Thread Starter
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Picked up the rear end from a 1972 W109 4.5 this morning. Can't read the diff ratio yet, but it has the horizontal damper and the horseshoe fluid pipe. Do all 109 V8 rear axles have this horseshoe pipe? I thought it was only the 6.3s.

Thx.

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post #6 of 7 (permalink) Old 04-30-2013, 06:55 PM Thread Starter
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Sold my Stag, so now the Fintail's W108 axle is in the garage. these are the things I am planning on doing to the axle b4 the swap:
- replace the calipers and pads
- clean or skim the rotors
- change the pinion seal
- clean the breather
- change the rhinoceros horn rubber mount
- change the trailing arm rubber mounts
- change the rubber brake lines from the body to the axle

Two Questions:
(1) How do you remove the pinion nut?
(2) Can I use the Fintail's drum handbrake cables,on the disc brakes?

Thanks much.

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post #7 of 7 (permalink) Old 04-30-2013, 07:19 PM
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1/ Remove the pinion nut by bending back the lock washer. punch a dot onto the end of the pinion shaft and mark the nut in the same place. Use a square end punch and hammer,knock the nut loose and COUNT how many turns it takes to undo the nut completely. write that number down.!!.
Most of the pinion nuts have Four slots,this means you can undo it four times (VW thinking..).
Buy a new lock wash and a seal .
Pull the old seal out and carefully fit the new seal. stck plentyo f grease on the seal lips to protect it when the flange goes back on.
Do the nut up to the exact number of turns you wrote down before and it should stop at the dot marks. DO NOT be tempted to tighten it up!!,you will alter the lash.
2/ You can use both types of handbrake cables,they are the same parts.
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