C1 (1960) dual quad mainfold question

[Donald H.]

We did the engine startup today after rebuild and had oil spitting out of a threaded hole in the intake mainfold. See the attache picture and blue arrow. Oil was spitting out so we screwed a bolt into the hole to stop the lead. I went back and looked at pictures of the dual quad setup when I bought the car and first took it off. I don't have a real clear picture, but from what I have, I can't see anything in the hole. The intake and carbs were restored by Bob Kunz.

Can someone tell me what the hole is for, and should there be a bolt or something screwed into the hole to prevent oil leak?

Thanks,

Don

Intake Manifold question 2.jpg

[Donald H.]

Re: C1 (1960) dual quad mainfold question

Does anyone know what is supposed to be in the hole? A hex head bolt or I was thinking of putting a set screw in it. Not sure what the judges are looking for.

Don

[Bruce B.]

Re: C1 (1960) dual quad mainfold question

Interesting question, I hope someone has the answer.

[Robert H.]

Re: C1 (1960) dual quad mainfold question

I can't get to my car right now, but it looks like the location where I have my coil bolted down.

[Dennis C.]

Re: C1 (1960) dual quad mainfold question

Does anyone know what is supposed to be in the hole? A hex head bolt or I was thinking of putting a set screw in it. Not sure what the judges are looking for.

Don

Don,

i believe there should be a Nyloc bolt there. Take a look at this thread.

https://www.forums.ncrs.org/showthread.php?35345-C1-intake-manifold-holes&highlight=Nyloc

Dennis

[Donald H.]

Re: C1 (1960) dual quad mainfold question

Don,

i believe there should be a Nyloc bolt there. Take a look at this thread.

https://www.forums.ncrs.org/showthread.php?35345-C1-intake-manifold-holes&highlight=Nyloc

Dennis

Thanks Dennis, that thread is what I was looking for

[James O.]

Re: C1 (1960) dual quad mainfold question

Don- Mine is pictured below but no oil comes through it. According to the other thread, I should try to find that bolt before my car is judged again. I never lost points for not having the bolt but that might mean it was just missed.

bolt hole.jpg

[Donald H.]

Re: C1 (1960) dual quad mainfold question

James, would you take a look again. Your picture clearly shows the rear most hole with no bolt, but there is another hole (see the blue arrow that I added to your picture). The second hole is just behind and close to the rear carb stud.

Thanks,


James car.jpg

[Anthony P.]

Re: C1 (1960) dual quad mainfold question

I will look at our 59 tomorrow just to check, it may be different than a 60??

[Donald S.]

Re: C1 (1960) dual quad mainfold question

Don,

i believe there should be a Nyloc bolt there

Here is another thread on Nylok with pictures; I'm not sure if it applies to '60's

https://www.forums.ncrs.org/showthread.php?63072-C-1-Aluminum-Intake-Coil-Bracket-Bolts&p=364941#post364941

Don

[Richard M.]

Re: C1 (1960) dual quad mainfold question

These ebay pics show a hole in back at the hole closest to the carb. I have bolts in both of those holes on my '59 3739653 2x4 manifold. That manifold was used from 1957 to 1961. I'd imagine the holes were for the coil bracket used on passenger cars.


DSCN2306_003.JPG DSCN2298_003.JPG

[James O.]

Re: C1 (1960) dual quad mainfold question

Don- There is no bolt in either hole and they dont leak but now you guys have me looking for bolts too. Jim O.

[Donald H.]

Re: C1 (1960) dual quad mainfold question

Thanks everyone for your help.

Don