Front Brake Issue, 914 Pulls right when stopping Options

[PDXBob]

Hi All,
I just finished putting on rebuilt rear brake calipers done by PMB. Also, new braided steel brake lines and set of new Textar pads on all 4 wheels (1975 914). I took it out to do the “bedding” break-in process and I noticed it was pulling to the right.

So, (after doing cool down slow driving)when I got home I checked temperature of rotors. Both back rotors were about 125 degrees. However front right was about 240 degrees. BUT front left was only about 85 degrees. To a novice like me seems like front left is not working.

Any suggestions on diagnostic procedures or what to check out.
Thanks
PDXBob

[technicalninja]

The rear adjustment can be difficult to gauge.
Just for testing adjust the rears until you have no clearance and see if that helps.
Don't drive the car like this but by taking all of the adjustment out you eliminate one variable.
If this works, then back the adjustment off just a bit. .004 is maybe 10-15 degrees of swing from contact.

I recently rebuilt a MSM Miata rear caliper set. It has one adjuster exactly like the 914 on the inside. Set it up as Mazda suggested and had low pedal. Adjusted the clearance more by "feel" than with gauges the second time. Worked fine after a much tighter adjustment than the service manual suggested.

[emerygt350]

The rear adjustment can be difficult to gauge.
Just for testing adjust the rears until you have no clearance and see if that helps.
Don't drive the car like this but by taking all of the adjustment out you eliminate one variable.
If this works, then back the adjustment off just a bit. .004 is maybe 10-15 degrees of swing from contact.

I recently rebuilt a MSM Miata rear caliper set. It has one adjuster exactly like the 914 on the inside. Set it up as Mazda suggested and had low pedal. Adjusted the clearance more by "feel" than with gauges the second time. Worked fine after a much tighter adjustment than the service manual suggested.

I just went back and tried this (PMB calipers just installed on the back) and I have to say I am pretty impressed. My brakes (after I installed the new rears) were ok to start with but this gave them quite a nudge. Much more confident in the stop. I could lock them up before but the pedal was getting pretty low. Now it is not even going down half way before we are into a "scare the neighbors" stop.

I do notice a little variability from stop to stop. I always give it a little double tap so it isn't that the brakes are pumped up sometimes and sometimes not. I suspect I still have some air in the fronts that needs to be worked out.