Hi all

(1) I have 2x hydro subframes
The stepped tower bolts are 5/16" unf at 1 end & 3/8 unf the other.
The 2 subframes are different. 1 has 5/16 the other has 3/8 in the head of the tower.
Which one is right, or it doesnt matter.

(2) Should I fit the studs to the towers & then fit the subframe to the car or fit the subframe then the studs?

(3) should I use the stepped studs or buy some bolts?

Thanks
Craig

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1967 Morris Mini Deluxe
1927 Austin 7

I think the original size was 5/16. I'd say someone has stripped and retapped the holes.

All the hydros I have seen have beed 5/16 with a bolt.
Rubber subframes have been 3/8 with the stepped stud.

I have just stripped two front hydro subframes, one from 1972 the other from 1973, and one has the 3/8" and the other 5/16". One had studs, the other bolts so obviously at one stage they were manufactured so and NO they haven't been drilled and tapped.

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1964 998 Cooper , 1968 Morris 1100

So, do you reckon it be better to use 3/8 bots or the stepped studs?
Craig

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1967 Morris Mini Deluxe
1927 Austin 7

I would choose the best looking subframe. Check the displacer mounting lugs up inside the tower. If they are the same, I would use the studs as they may give more support.