Pluging Exhaust Manifold after Removing Air Pump/Injectors????

Thread view:

Enable EMail Alerts

Start New Thread

Thread rating:

roger454 - 09 Jun 2007 05:53 GMT

How do you plug the holes in the exhaust manifold after removing the air
pump and
air injector manifold on a 1988 chevy 454 CI with factory headers. Need to
know the size (diameter) and threads (tpi) to make plugs? Or if anyone
knows anyway to do it. Taking chevy P30 with 454 from CA to NC do not need
the air pump in NC.
Thanks

Reply to this Message

Mike Romain - 09 Jun 2007 15:19 GMT

> How do you plug the holes in the exhaust manifold after removing the air
> pump and
[quoted text clipped - 3 lines]
> the air pump in NC.
> Thanks

Normally you just match up the piece you took out. They would be pipe
threads I believe.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's - Gone to the rust pile...
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pictures.html?id=2115147590
(More Off Road album links at bottom of the view page)

Reply to this Message

the fly - 09 Jun 2007 19:30 GMT

>How do you plug the holes in the exhaust manifold after removing the air
>pump and
[quoted text clipped - 3 lines]
>the air pump in NC.
>Thanks

Take the air injection manifold to a hydraulic hose & fitting
store. They can match the threads and sell you plugs for the holes.
They're probably NOT tapered pipe threads, but straight threads as
used with compression ferrules.

Reply to this Message

disston - 09 Jun 2007 20:08 GMT

> >How do you plug the holes in the exhaust manifold after removing the air
> >pump and
[quoted text clipped - 8 lines]
> They're probably NOT tapered pipe threads, but straight threads as
> used with compression ferrules.

On old Fords we used to use a spark plug to plug that hole. Maybe the
same on a Chevy?

disston

Reply to this Message

roger454 - 12 Jun 2007 20:08 GMT

Thanks to all for your suggestions. I resolved the problem by having a
tubing shop make up 8 plugs for the exhaust manifold. He had the fittings
and tubing in stock. The tubing is 5/8 with an inverted flare, the fitting
is actually a 7/8 with 18 threads per inch. He used approximately 3" of
tubing then crimped and brazed the tubing. The same could be done if you
cut the air injector manifold off and leave enough tubing to crimp and
braze or weld.

Reply to this Message