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Distributor Housing Leaking And Stripped Bolt


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The distributor housing gasket is leaking. I have resealed it twice, once with a gasket and RTV and once with RTV only. Both times it started leaking in a few hundred miles.


To make matters worse, the threads in the block for the big bolt (M8) bolt are stripping. Most of the threads are gone and only a couple deep in the hole are still biting and so i dare not tighten this bolt too much for fear of destroying the last couple threads.


Im going to redo the gasket and not use RTV at all, gasket only.


What are your thoughts on the stripped threads? Try retap the threads? Is it a M8 x 1.25? I am not removing the block so the retapping is going to have to happen in the space between the firewall and the head. I have also never really retapped a thread, so suggestions and tools pointers would be great.



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Are you sure you are using the correct length M8 bolt?  30mm IFIRC.


The housing bolts to the head, not the block.  I'd pull the head off & install a threaded insert.


Also don't forget the special sealing washer on the shorter M6 bolt.


Good luck!

Edited by lilmo
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While going through a pile of distributor housings recently, I was surprised at how many were cracked (typically a small split, in the section where the distributor slides in... and not hard to miss). You might check yours. -KB

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