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Those are the screwplugs @ToyotaMatt Do you know what tap size I can use to re-thread the cross threaded threads in my manifold? I think the size for this application is 3/8"-19 in either JIS PT aka BSPT aka ISO R(or Rc)? Please see attachment below and previous JIS attachment posted by @2mbb...

Wow, excellent piece of history here. Thank you for sharing this. I might be able to take this to a specialty bolt place nearby that has measuring instruments and see if they can use this information to classify the screw plug for me. I think we are narrowing it down! I appreciate everyone's...

Thanks for this @2mbb I think the 19 tpi is probably what the Toyota screw plug is too. I also found this article online Fitting Connection Types: British, German & Japanese - https://blog.brennaninc.com/connection-types-british-connections that talks about how BSPT connections are...

I'm leaning in this direction @Godwin I like the idea of a dashboard of all the information I can get on the engine while I'm driving. I think it would help with any issues that might come up later too like diagnosing, tune-up, etc. Just want to see what parts would be needed and ask others with...

Thank you for this research. A little while ago this evening I came across this thread in the 40/55 tech forum with a similar part: https://forum.ih8mud.com/threads/vacuum-test-port-tap-location-on-intake-manifold.1221073/ "Union (For Front Drive Shift) - Part Number 90404-51093" Credit to...

UOTE="Spike Strip, post: 14280747, member: 9610"] Oh yeah - It was just the Exh manifold. Forgot. Anyway, I'm not sure, but I think all BSP is Imperial. I'm not 100% on that, but pretty sure there's no such thing as Metric BSP thread. Have you torqued down the manifold? That plug is...

Thank you @OSS I figured it must be metric but the thread didn't match any of the metric leaves in my thread pitch gauge, and, yes the hex is a metric size 8, but I was thrown off by the 16.4mm measure I got with the caliper. I appreciate the sealer information. I'll have to get that for when I...

Hello fellow MUDders, I am putting together a 2F for my 60 with scraped up parts and have a question about the 2F intake manifold's taper screw plug, pictured here: A previous owner of the intake manifold I have crossthreaded the hole the taper screw plug goes into and I want to chase the...