Master Cylinder to Firewall Plate Bolt Size

[Jeff10]

Hey,

(Honest... I have searched here, and there is nothing in the shop manual.)

I removed the bolts that hold the master cylinder to the firewall backing plate in hopes of installing the Astro Van hydroboost unit.

Most of the bolts seems a little tight coming out (including the 2 above the master cylinder bolts that are used with the Astro Van install plate); but, I really didn't think there was a problem.

Trying to reinstall them, they really don't feel right. I am using the same bolts that came out for the install, although I'm not sure exactly which bolt came form which of the 4 holes. I am afraid I might be cross't threading the female portion on the backing plate, although when I remove the bolts afer working them in part way, the bolts show no sign of cross-threading.

Just to make sure the previous owner used the right bolts, can someone tell me what size they should be? I don't want to mess thinngs up any worse than they might already be. (I have PB'd them, used assembly lubricant, worked them slowly in, and then out a little, then in some more. It just doesn't feel right.

Knowing the bolt size will at least let me check that off the list.

Thanks

Jeff

 

[NicksTrix]

3/8 x16 hold that whole assembly on

 

[Jeff10]

Thanks

Hi NicksTrix,

3/8 x16 hold that whole assembly on

Thank You!

I appreciate the info.

Jeff

 

[chriswitt]

good tap and Die set and some Anti Seize... 2 of the best things i have been using for my frame off project. I would clean the threads out with a tap and then you will never have any issues.

 

[Jeff10]

Hi Chris,

good tap and Die set and some Anti Seize... 2 of the best things i have been using for my frame off project. I would clean the threads out with a tap and then you will never have any issues.

The tap was on my list for today.

Thanks

Jeff