I had a stuck brake adjuster on my 67 MKII and had a little difficulty removing my drum on one side due partly to a bit of a ridge on inside edge of drum that was hanging up on shoes. What is the maximum allowable inside drum diameter spec after resurfacing? Drums look original and un-cut so don't think I'll need to remove much and inside surface looks good.
Secondly, since my brake master looks original and has a pretty aged looking resevoir I am installing a new one. Servo will go out for a rebuild as well, so I want to flush entire system, redo all rubber gaskets and brake hoses. The standard Castrol GTLMA standard DOT 3/4 fluid (non synthetic) seems hard to find (suggestions welcome). I understand if I switch to the synthetic GTLMA new formula (easy to find) it will interact with the old style non-synthetic fluid left in the system even after a flush and cause rubber components to quickly deteriorate. Is this true, or should I just flush whatever combo of non-synthetic fluid that is in the system and renew with the synthetic after rebuilding? Thanks, Dave Gilmore
Secondly, since my brake master looks original and has a pretty aged looking resevoir I am installing a new one. Servo will go out for a rebuild as well, so I want to flush entire system, redo all rubber gaskets and brake hoses. The standard Castrol GTLMA standard DOT 3/4 fluid (non synthetic) seems hard to find (suggestions welcome). I understand if I switch to the synthetic GTLMA new formula (easy to find) it will interact with the old style non-synthetic fluid left in the system even after a flush and cause rubber components to quickly deteriorate. Is this true, or should I just flush whatever combo of non-synthetic fluid that is in the system and renew with the synthetic after rebuilding? Thanks, Dave Gilmore