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Jun 13, 2018 7:25 pm
Jun 13, 2018 7:25 pm
Subject: Re: Exhaust Manifold Gasket
Hi Hugo
I think you would agree it's vile job much better done with the engine out! Glad you got all the studs out OK.
By the way Lagonda seldom used Whit, they almost always used BSF on the smaller studs and then 20 TPI on the larger ones.
This equates to either UNF or 20 TPI cycle thread variants. Not sure about the thread angle used by Lagondas on the larger 20 TPI bolts but I think it was 60%. Tracy Tools sells taps and dies in these lovely obscure sizes. You will end up with drawers full of them, just like me...
I think low chassis floor bolts are BSW for some strange reason.
Colin
Hi Hugo
I think you would agree it's vile job much better done with the engine out! Glad you got all the studs out OK.
By the way Lagonda seldom used Whit, they almost always used BSF on the smaller studs and then 20 TPI on the larger ones.
This equates to either UNF or 20 TPI cycle thread variants. Not sure about the thread angle used by Lagondas on the larger 20 TPI bolts but I think it was 60%. Tracy Tools sells taps and dies in these lovely obscure sizes. You will end up with drawers full of them, just like me...
I think low chassis floor bolts are BSW for some strange reason.
Colin