Quality control??

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Guessing this plug is a leak filler in this 906 head that I've had since the 70's but I'm not gonna' remove it to find out.....
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Yup. It’s not leaking so I wouldn’t even look at it knowing my luck.

It would think I was side eyeing it and it would start leaking just to irritate me.

I’m not poking that bear.
 
View attachment 1716493625
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The top picture is a pin hole that opened up when I charged the cooling system.

Brand new intake manifold.

The bottom picture is my fix.

I was going to pull the intake and run it up on the hill so @MOPARMAGA could TIG it.

Then I said screw that and fixed it with a plug.

Just crap **** any more. It cost me at least two hours to unscrew that.

Holley can suck it.
Did you go all of the way through with the drill?
 
Yup. It’s not leaking so I wouldn’t even look at it knowing my luck.

It would think I was side eyeing it and it would start leaking just to irritate me.

I’m not poking that bear.
Is there a reason you're keeping the intake make and model a secret?
 
The manifold is a brand new Weiand tunnel ram. It was from the last batch that Holley made and supposedly they won’t make any more.

And, Holley says they used the exact molds that Weiand did years ago. I’m not sure I buy that now. But I did when I got it.

I don’t know how many manifolds of every brand I can think that I installed and never saw this before.

It’s like @Oldmanmopar said above. His kid is pressure testing everything.

That’s where I’m at. Another detail that must be verified.

If this was a customer engine on the dyno I’d be losing my entire *** and probably both legs on this time burglar.

Edit: if Speedmaster made a tunnel ram I’d look at it.
Nevermind. I missed this post.
 
This is why I ALWAYS recommend going with vintage stuff. It's always better. The aftermarket always finds ways to make things cheaper. That usually means thinner. It flat out sucks dead rotten elephant balls that it was new.
 

Oh wait, after looking at the pics you did not remove the thermostat. I'm sure there is some technique to successively pull that off. I would have to pull the thermostat.
 
I’m still trying to get my head around what it would be like finding a gravity powered water leak on an out of the box probably $600 plus intake…
 
I would keep a close eye on the spot and repair. More often than not in my experience, the cavity can go other places as well after more heat cycles. Hopefully no coolant makes it to an intake port
Back in the '80's, I worked for a Buddy's Dad, and at some point He purchased a diesel Lynx. Couple of years later, that thing was leaking oil around a head bolt up front, so He pulled the head & brought it to Me. The oil gallery running across the frt. was leaking thru' the casting right to the head bolt hole, so I yanked the plug, sized it & pressed a tube w/sleeve retainer on it into the gallery...pretty long ways there. It lasted for a few months, then sprung somewhere else.....they said screw it & just kept adding oil, lol.......
 
I’m still trying to get my head around what it would be like finding a gravity powered water leak on an out of the box probably $600 plus intake…

Trust me, it wasn’t pretty when I figured it out.

I kept thinking it was a pin hole in the upper cooling hose. So I shortened the hose. Then it leaked again so my bone head decided the hose was bad.

So off to town I go to get a different hose.

And…yup the leak is in the same damn spot with a new hose. So Im thinking this is near impossible. I stick my hand under the hose and that’s when I figured it out.

Just baffling.
 
I probably would have come dangerously close to stroking out right then and there... I don't believe I'd trust who was overseeing the manufacture of that to sling **** in a **** house.
Lol, I'm a glutton for punishment. If something like that doesn't happen for me, I'm double checking till I make it happen.
 
View attachment 1716493625
View attachment 1716493626

The top picture is a pin hole that opened up when I charged the cooling system.

Brand new intake manifold.

The bottom picture is my fix.

I was going to pull the intake and run it up on the hill so @MOPARMAGA could TIG it.

Then I said screw that and fixed it with a plug.

Just crap **** any more. It cost me at least two hours to unscrew that.

Holley can suck it.

Private Equity, bro!
Numbers go up, bro!
Cut costs, bro!
 
OR it may even have a minute crack or cracks that cannot be seen. You make a great point. We're just gettin fleeced comin and goin with the quality of auto parts.

You think it's just auto parts?
You sweet summer child...

Edit:
That is why i signed my name on every part i made when i was building drones. If anything went wrong with my parts, i wanted to know so i could fix the issue for future parts. I only got one type of part back, and that was a resin chemistry issue.
 
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The manifold is a brand new Weiand tunnel ram. It was from the last batch that Holley made and supposedly they won’t make any more.

And, Holley says they used the exact molds that Weiand did years ago. I’m not sure I buy that now. But I did when I got it.
For a sand casting, I can believe that, particularly if they took Weiand's patterns to a different foundry. There's a lot of steps in between the patterns to making a sand mold to pouring the casting and machining to the final shape, and a lot of places things can go wrong if you cut corners.

Of course, technically the mold in this particular process is something that you're only supposed to use once, after which it collapses into a pile of sand. Maybe Holley really was trying to re-use Weiand's molds. :p
 
You think it's just auto parts?
You sweet summer child...

Edit:
That is why i signed my name on every part i made when i was building drones. If anything went wrong with my parts, i wanted to know so i could fix the issue for future parts. I only got one type of part back, and that was a resin chemistry issue.
Well, that's kinda all we discuss HERE, but yeah, we're gettin fleeced on literally everything.
 
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