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> Torque Spec Needed, Rear Brakes
Ansbacher
post Mar 17 2021, 12:37 PM
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Anyone know the torque spec for the 19 mm caliper retaining bolts on the rear brakes? Car is a '74 2.0 . Thanks.

Ansbacher
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mepstein
post Mar 17 2021, 01:12 PM
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Really tight. Just kidding sort of. It's a tough spot to put a torque wrench on.
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JeffBowlsby
post Mar 17 2021, 01:39 PM
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QUOTE(Ansbacher @ Mar 17 2021, 11:37 AM) *

Anyone know the torque spec for the 19 mm caliper retaining bolts on the rear brakes? Car is a '74 2.0 . Thanks.

Ansbacher


According to the Tech Specs book:

M12 x 1.5 x 30? 7.0 ft lbs
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914e
post Mar 18 2021, 12:48 AM
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QUOTE(JeffBowlsby @ Mar 17 2021, 12:39 PM) *

QUOTE(Ansbacher @ Mar 17 2021, 11:37 AM) *

Anyone know the torque spec for the 19 mm caliper retaining bolts on the rear brakes? Car is a '74 2.0 . Thanks.

Ansbacher


According to the Tech Specs book:

M12 x 1.5 x 30? 7.0 ft lbs

I think that is meter kilopond
It should be 50 ft lbs
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bdstone914
post Mar 18 2021, 06:54 AM
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QUOTE(JeffBowlsby @ Mar 17 2021, 12:39 PM) *

QUOTE(Ansbacher @ Mar 17 2021, 11:37 AM) *

Anyone know the torque spec for the 19 mm caliper retaining bolts on the rear brakes? Car is a '74 2.0 . Thanks.

Ansbacher


According to the Tech Specs book:

M12 x 1.5 x 30? 7.0 ft lbs


I cant believe it is 7 ft lb. Did you add a decimal in error?

@JeffBowlsby
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Mark Henry
post Mar 18 2021, 07:54 AM
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QUOTE(mepstein @ Mar 17 2021, 03:12 PM) *

Really tight. Just kidding sort of. It's a tough spot to put a torque wrench on.

The spec is "good 'n tight"!
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JeffBowlsby
post Mar 18 2021, 08:17 AM
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QUOTE(bdstone914 @ Mar 18 2021, 05:54 AM) *

QUOTE(JeffBowlsby @ Mar 17 2021, 12:39 PM) *

QUOTE(Ansbacher @ Mar 17 2021, 11:37 AM) *

Anyone know the torque spec for the 19 mm caliper retaining bolts on the rear brakes? Car is a '74 2.0 . Thanks.

Ansbacher


According to the Tech Specs book:

M12 x 1.5 x 30? 7.0 ft lbs


I cant believe it is 7 ft lb. Did you add a decimal in error?

@JeffBowlsby


You're right Bruce I should have questioned that.

Turns out its more likely "7.0 mkg" = 50 ft lbs.

Of the several torque value tables in the Tech Specs book, only one has the units mkg indicated all other tables do not show units.




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Ansbacher
post Mar 18 2021, 10:45 AM
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Thanks everyone for clearing this up. Now, if I could just find my torque wrench.... (IMG:style_emoticons/default/headbang.gif)

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brant
post Mar 18 2021, 10:47 AM
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also... don't the rear calipers have the locking tab... that prevents those bolts from loosening....

I never use a torque wrench on them
good and tight has always worked.
and then the lock tabs
b
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mepstein
post Mar 18 2021, 11:15 AM
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QUOTE(brant @ Mar 18 2021, 12:47 PM) *

also... don't the rear calipers have the locking tab... that prevents those bolts from loosening....

I never use a torque wrench on them
good and tight has always worked.
and then the lock tabs
b

Yes, Mark said it well. Good and tight.
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bdstone914
post Mar 18 2021, 01:23 PM
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QUOTE(brant @ Mar 18 2021, 09:47 AM) *

also... don't the rear calipers have the locking tab... that prevents those bolts from loosening....

I never use a torque wrench on them
good and tight has always worked.
and then the lock tabs
b

@brant

Fronts have the lock tabs. I toss them and use wave washers like all other Porsche calipers use
Rears have the backing plate strap that goes between the caliper rear and trailing arm. If left out the caliper rubs.
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iankarr
post Mar 18 2021, 01:42 PM
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Backing plate strap?
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brant
post Mar 18 2021, 03:05 PM
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good point.. and I wasn't very clear.
I was thinking the rear backing straps too

I just use split washers on my front calipers also.
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