Now working on the two barrel on a 1 barrel intake mod and new exhaust manifold swap. This Mopar exhaust manifold has a threaded hole on the rear part of the center collector, I assume for an oxygen sensor or?? A 3/8" pipe plug threads loosely into it but doesnt snug up, even when threaded all the way in. Anyone know what size these threads are, or what I need to plug it properly? I really don't feel like carting the thing around trying to find something.....


Thanks, Lorin

That's the O2 sensor tapping. Why not fill it with an O2 sensor? Then you'll have reason to install an EFI system!

The thread is metric (spark plug thread).

Ken

18mm. A big Ford spark plug will fit if you can't find the correct plug.

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Joshua

Dorman 65220 oil pan plug (18mm x 1.5 thread, 19mm hex head)

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Ed
64 Valiant 225 / 904 / 42:1 manual steering / 9" drum brakes

Excellent! I never would have thought it to be metric. What a dummy I am!

Now you have a reason to add a set of thread gauges to your tool collection.

Or a LM1

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'72 Duster 198 stock cam, 3:23's Hookers on jack stands for 8 years in the driveway
'79 Maxivan 360 Offy Qjet Comp RV cam/rusting in the driveway.
93 D350 160HP Cummins Auto Dually Clubcab needs a injector pump
2005 Golden Couch Buick

Absolutely! It's one of those "Why did'nt I think of that" things. Too simple. The time I could've saved!

Once you become a toolaholic, its incurable. I have 3 roll-around toolboxes with chest on each. Over 10 feet end to end and 6+ feet tall, with about 70 overflowing drawers. And that doesn't count the machinery and tooling (lathes, mills, grinders, etc.) Every time I add a toolbox, it keeps shouting "Fill me!" LOL!

Ken