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67 L79 intake bolts oil seep

 
Old 03-07-2019, 09:13 AM
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emdoller
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Default 67 L79 intake bolts oil seep

I have an intake bolt near my carb that is seeping oil. Given what Iíve read this is common and can be fixed by removing the bolts and using thread sealer.

My questions:

1) should I only do this to the one bolt seeping or do all 4 bolts near the carb (2 on each side)?

2) should I do one bolt at a time? Remove, clean, apply sealer, torque.

3) whatís the best way to clean the bolt hole so the sealer will seal?

thanks in advance.

Ed
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Old 03-07-2019, 09:19 AM
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Nowhere Man
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I would only do the ones that are leaking one at a time. To clean use brake clean on a q-tip to clean out the holes in the head and just spray it on the bolts. Wipe and blow dry Apply sealer and torque back down
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Old 03-07-2019, 09:19 AM
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Frankie the Fink
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1) I would do it to all of them personally, in fact I did on my 61.
2) Yes, but I would go back around the intake in the proper sequence when done with ALL the bolts and re-torque to spec as needed.
3) A little lacquer thinner on a Q-tip or a shot of carb cleaner would do it... Hold a rag over the hole when spraying carb cleaner ...
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Old 03-07-2019, 10:26 AM
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MikeM
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Originally Posted by Nowhere Man View Post
I would only do the ones that are leaking one at a time.
I agree. Why tamper with something that isn't a problem.

Besides, there's an old saying about, "if you're looking for trouble, you can always find it".

But if you're one that can't resist the urge, the four corner bolts don't need sealer. They're blind holes. But hey, you could go on and pull them out. Clean the threads really good. Repaint the manifold under the bolt heads and re-assemble. Then you can touch up the red/silver paint on all the bolts that you skinned it off of with the wrench action.

Lot's of opportunity here to waste a whole afternoon.

Last edited by MikeM; 03-07-2019 at 10:29 AM.
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Old 03-07-2019, 12:44 PM
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Last summer I removed one rear bolt to install the correct wire support bracket. Immediately started leaking coolant! Simple task resulted in removing the aluminum manifold and installing new gasket set.
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Old 03-07-2019, 01:34 PM
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Thanks for all the input. I tend to agree with the philosophy of only pulling the leaking bolt. Hope to get to it this week.

Ed
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Old 03-07-2019, 02:06 PM
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mrg
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Originally Posted by emdoller View Post
Thanks for all the input. I tend to agree with the philosophy of only pulling the leaking bolt. Hope to get to it this week.

Ed
Murphy is waiting in the wings
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Old 03-12-2019, 05:44 PM
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I couldn’t get my torque wrench on it and didn’t want to remove the carb. Had to do some calculations to use my crows foot. You gotta love physics. Only time will tell of the sealer solved the oil deep.

Ed


Last edited by emdoller; 03-12-2019 at 05:45 PM.
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Old 03-12-2019, 06:14 PM
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AZDoug
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Torque wrench? on an intake manifold bolt? I use arm feel for non critical, hard to reach bolts.

Doug
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Old 03-12-2019, 06:26 PM
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Originally Posted by AZDoug View Post
Torque wrench? on an intake manifold bolt? I use arm feel for non critical, hard to reach bolts.

Doug
i did us on open end wrench first but wanted to see if my feel was ok. It was.

Ed
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Old 03-13-2019, 12:24 AM
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Remember it aint the space shuttle....

-terradactyl
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Old 03-13-2019, 01:13 AM
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Originally Posted by AZDoug View Post
Torque wrench? on an intake manifold bolt? I use arm feel for non critical, hard to reach bolts.

Doug
.........but make sure you go back and forth bringing up the torque value about 5 lbs at a time, by wrench or arm to prevent any extra stress.
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Old 03-13-2019, 08:27 AM
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For some, work expands to fill available time.
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Old 03-13-2019, 09:36 AM
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Originally Posted by ejboyd5 View Post
For some, work expands to fill available time.
agree. I was having fun... also gave me a reason to buy a new set of crows feet!!

Ed
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Old 03-13-2019, 03:02 PM
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What type or brand of sealant are you using the threads?

Don
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Old 03-13-2019, 03:04 PM
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Originally Posted by vetsvette2002 View Post
What type or brand of sealant are you using the threads?

Don
Hi Don

ARP thread sealer.

Ed
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Old 03-13-2019, 09:52 PM
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Originally Posted by ejboyd5 View Post
For some, work expands to fill available time.
That is sure a lot better than the other way around...

Two more years and I can't wait to have that problem.
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Old 03-13-2019, 09:54 PM
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Originally Posted by smacota1 View Post
That is sure a lot better than the other way around...

Two more years and I can't wait to have that problem.
I was lucky enough to retire young. I had many say Iíd go crazy given how intense I was while working. They also said Iíd be back in less than one year. That was 4 years ago. While I do miss the people, I donít miss all the BS that unfortunately goes with it. Iím busy every day and am enjoying life.

Ed
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