74 BB EGR Blank-Off

3539 Views 26 Replies 9 Participants Last post by Darrow, May 30, 2007

big2bird

Discussion Starter · May 27, 2007

4

I am helping out a member of DC with his engine refresh. He would like to eliminate the EGR valve from his 74 BB. Anyone have a good method for blanking off a clamp type EGR?

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Steve J

· #2 · May 28, 2007

Bird,
I don't have experience, just a suggestion. How about 1/8" thick piece of steel with a slight curve to it to take the place of that hold down clamp. If it was to touch the far side of the pad first then the hold down bolt could draw it tight over a gasket or some #2 rtv.
take it or leave it, good luck
steve

010752

· #3 · May 28, 2007

Why don't you just thread it, and put either cap bolts, set screws or pipe plugs in. Not much pressure there. If you don't go crazy then the egr can then always be reinstalled to function.

Dan85Vette

· #4 · May 28, 2007

010752 said:
Why don't you just thread it, and put either cap bolts, set screws or pipe plugs in. Not much pressure there. If you don't go crazy then the egr can then always be reinstalled to function.

Great suggestion.

big2bird

Discussion Starter · #5 · May 28, 2007

Frankly, the more I think about it, having a machine shop profile a piece the same shape as the base of the EGR might be the easiest. I wonder if the eastern cars came with a blank? Hmmm?

Paranoid

· #6 · May 28, 2007

big2bird said:
Frankly, the more I think about it, having a machine shop profile a piece the same shape as the base of the EGR might be the easiest. I wonder if the eastern cars came with a blank? Hmmm?

I had a bolt on EGR on my '80 TA, I fabricated a plate from sheet aluminum and mounted under the EGR. Don't know if that would work here.

Can you plug that little nipple?

TimAT

· #7 · May 28, 2007

big2bird said:
Frankly, the more I think about it, having a machine shop profile a piece the same shape as the base of the EGR might be the easiest. I wonder if the eastern cars came with a blank? Hmmm?

In '74, everybody got their very own EGR valve. Tapping a plugging seems like a good idea to me, and then you could grind the bottom of the valve off, put it back on and look like it['s supposed to be there. Maybe you could slide by Cali inspections?

:cheers:

big2bird

Discussion Starter · #8 · May 28, 2007

TimAT said:
In '74, everybody got their very own EGR valve. Tapping a plugging seems like a good idea to me, and then you could grind the bottom of the valve off, put it back on and look like it['s supposed to be there. Maybe you could slide by Cali inspections?

:cheers:

74 is exempt. We can do anything, including leaving it on and inoperable. I am just hoping someone has done this already, as we would prefer to just make it go away.

Darrow

· #9 · May 28, 2007

Jeff it looks like there may be enough meat there to tap it out and install pipe plugs, allen type may look ok. let me check the size. OPPS now I need a heli coil on one intake bolt darn.:smack

Fred Mann

· #10 · May 28, 2007

Are you trying to get rid of the hold-down clamp too? Does the owner ever plan on putting the EGR valve back in?

Darrow

· #11 · May 28, 2007

Fred Mann said:
Are you trying to get rid of the hold-down clamp too? Does the owner ever plan on putting the EGR valve back in?

no

Fred Mann

· #12 · May 28, 2007

Fred Mann said:
Are you trying to get rid of the hold-down clamp too? Does the owner ever plan on putting the EGR valve back in?

I should have addressed the above to big2bird.

Maybe the answer is the same. I congratulate you on the brevity of your reply. :laughing:

Darrow

· #13 · May 28, 2007

Fred Mann said:
I should have addressed the above to big2bird.

Maybe the answer is the same. I congratulate you on the brevity of your reply. :laughing:

Its my car.................

Fred Mann

· #14 · May 28, 2007

If the existing holes can't be tapped, maybe 2 new smaller holes could be. Transfer the outline of the EGR base gasket onto the manifold. Call the locations of the existing holes 9 and 3 o'clock. Put new holes within the gasket outine at 12 and 6. Tap the holes and make a blank-off plate to the dimensions of the gasket with 2 holes for the bolts. This would require some meat there for say a 1/4-28. Not having the manifold in front of me, I don't know if that's the case. Just a thought.

Fred Mann

· #15 · May 28, 2007

Darrow said:
Its my car.................

ESP failure on my part.

Darrow

· #16 · May 28, 2007

Fred Mann said:
If the existing holes can't be tapped, maybe 2 new smaller holes could be. Transfer the outline of the EGR base gasket onto the manifold. Call the locations of the existing holes 9 and 3 o'clock. Put new holes within the gasket outine at 12 and 6. Tap the holes and make a blank-off plate to the dimensions of the gasket with 2 holes for the bolts. This would require some meat there for say a 1/4-28. Not having the manifold in front of me, I don't know if that's the case. Just a thought.

No problem I should have said its mine. But I got in a hurry to hear the resaults before:thumbsup: I did something I might not want to do....

Fred Mann

· #17 · May 28, 2007

Darrow said:
No problem I should have said its mine. But I got in a hurry to hear the resaults before:thumbsup: I did something I might not want to do....

You're doing it right. Taking your time because you know you have to look at it for the next X number of years. :cheers:

jotape650

· #18 · May 29, 2007

:thumbsup: i used the base of the EGR as a template to cut out a flat bar plate and it came out great jus like bird said!!!!!!!!!!!!

big2bird

Discussion Starter · #19 · May 30, 2007

2

010752 said:
Why don't you just thread it, and put either cap bolts, set screws or pipe plugs in. Not much pressure there. If you don't go crazy then the egr can then always be reinstalled to function.

Well, we have a winner. Seems Darrow has been busy.:laughing:

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010752

· #20 · May 30, 2007

Put a good thermostat in there

8 bucks at Advance auto :rolling:

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