[Healeys] Motor Mout Bolts

[Michael MacLean]

The only reason I asked this question in the first place was because a 3/8" UNF bolt screwed into all eight holes for a few threads and stopped.  Because it was the same in all eight holes I did not want to force it.  So, now I can run a 3/8 - 20 UNF tap through the hole to clean it up. So, I take it all threaded holes in the engine bay are UNF.  Certainly simplifies it.Mike MacLean

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  On Sun, May 10, 2020 at 8:51 AM, Curtis Arndt<cnaarndt at gmail.com> wrote:   They are UNF on my BN1 built 11 Jan. '55.  If they ever were BSF, it was very early in BN1 production. 
On Sat, May 9, 2020, 16:54 Perry via Healeys <healeys at autox.team.net> wrote:


Michael

There was a slow switch from BSF to UNF fasteners used and threads on some parts starting about mid 1954 through the end of 1955 at several locations on the 100. However I can not speak to the engine mount to chassis fasteners. 

Its one of those areas of the car that if I ended up with damage to the welded nut threads that could not be cleaned up with a tap I would do what was necessary to secure the engine mount short of replacing the welded nut. 

Perry

 

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From: Michael MacLean
Sent: Saturday, May 9, 2020 5:14 PM
To: Healeys
Subject: [Healeys] Motor Mout Bolts

 

Are the bolts that fasten the motor mounts to the frame different threads between the BN1 and the BN2?

Mike MacLean

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