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Getting the 73 Back on the Road


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  • 2 weeks later...

So, I thought I try some experimenting in the garage today. The wife agreed to join in, too.

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We generated some heat, and thanks to the baby oil, I found both holes. I felt very satisfied.

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Now I need to fill the holes. I'm man enough to do it. 

If I can't remove the old fittings, I'll probably use my cheap wire welder to fill in the air injector.

 

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7 minutes ago, siteunseen said:

Boy oh boy! That's NSFW (almost).

I must congratulate you on walking the wire, tip toeing around there. Excellent job Steve!

Is there a different way of describing the use of a smoke machine to find exhaust leaks?

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15 minutes ago, SteveJ said:

Is there a different way of describing the use of a smoke machine to find exhaust leaks?

I used this video as the basis for my design. 

 

I modified the design to use valve stems for the air inlet and outlet. I removed the valve out of the outlet valve stem. I also used a towel as the wick and soaked the towel with baby oil.

I used 1/4 ID vinyl tubing from the outlet stem to the engine with the plan being to use a compression tester hose in the spark plug hole. I forgot that the compression tester hose had a one-way valve pointing the wrong way, though. That meant I needed a small length of 1/2 OD tubing to go over the 1/4 ID tubing. That provided a seal around the spark plug hole that was adequate for the task.

With the cam holding open the #2 exhaust valve, I used the soldering iron to heat up the towel. The wife was good enough to operate the tire inflator to supply the air to push the smoke into the cylinder. It didn't take long to see the smoke pouring out of the holes in the air injector.

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Great vid. 

Smoke is also a brilliant way to locate leaks in the body that allow exhaust fumes an ingress path.  I learned this somewhere, but cannot recall to give credit where due.  I've located several holes at the rear of the car that I was never able to find previously using this technique.

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5 minutes ago, ETI4K said:

Great vid. 

Smoke is also a brilliant way to locate leaks in the body that allow exhaust fumes an ingress path.  I learned this somewhere, but cannot recall to give credit where due.  I've located several holes at the rear of the car that I was never able to find previously using this technique.

I can't take credit for the video, but I agree that it's great. 

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2 hours ago, siteunseen said:

Okay I'm a pervert, I'll admit that but I apologize for going to the dark side after reading the above. 

Would someone please agree with me?

LOL. I think everyone agrees with you. Steve should never admit it in public, but it's just all way too well done to be "coincidence".  

3 hours ago, SteveJ said:

Is there a different way of describing the use of a smoke machine to find exhaust leaks?

No. Absolutely not. That's just about perfect.    ROFL Maybe the only thing that could have possibly been a tiny bit better would be if you decided that the tire inflator was risky because it generated too much pressure, so the wife had to resort to something a little more gentle. Like blowing into a tube or something.

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19 hours ago, Captain Obvious said:

LOL. I think everyone agrees with you. Steve should never admit it in public, but it's just all way too well done to be "coincidence".  

I think this one was better...

 

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Today I pulled off the intake to address the exhaust leak.

I cut off the air injectors and proceeded to tap the fittings with an M7x1 tap. One bolt broke as I tightened it, but I think it's sealed. I'll find out with another smoke test in a little while.

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It passed the smoke test. Well, there was smoke coming out around the gasket because the exhaust manifold wasn't bolted down where it shares studs with the intake. Anyway, I buttoned it back up, and I'll be testing soon to see if I hear anything that I shouldn't with regards to an exhaust leak.

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  • 2 weeks later...

So the part needed for the next step in the reawakening has arrived. I plan to install it this weekend...I hope.

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1 hour ago, ETI4K said:

Very, very nice reproduction.  Did you get new pads as well?

No, it doesn't come with pads. I'll have to fabricate those.

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Sorry about that, went back in the thread and saw the address. They do produce it but are on back order. 

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