Oil Pool in Top Recess on Intake Manifold

[Mark F.]

Re: Oil Pool in Top Recess on Intake Manifold

I've also had this problem almost the entire time I have owned my car (22 years) - '67 400HP (3894382 aluminum intake)
I also thought it was carburetor-shaft-related, but after all three were rebuilt, a milder level of pooling/puddling returned even after carefully re-torquing in proper sequence...

I guess now I have two questions:
1. Is there any concern with loosening only one out of the 16 intake bolts (removing it; cleaning etc. as noted above) then re-torquing it back in place - adjacent to others that have been torqued for many years (20 yrs. in my case)? These puppies are notorious for cracked tabs and '67 400 intakes are a one-year-only part.

2. If I re-check torque on the remaining 15 bolts, now that I've been made aware oil may be lubricating them from the underside, should I be concerned that I may over-torque them because some (maybe not all) of the bolts may still be dry; but others may be "lubed" and there's no way to tell which is which?

I have no upcoming plans for re-judging my car and I do drive it (not as much as I'd like to), but I'd rather not have this puddle on my intake. I also don't want to risk cracking a tab for a mildly unsightly condition.

DSCN6524.jpg

[Joe L.]

Re: Oil Pool in Top Recess on Intake Manifold

I've also had this problem almost the entire time I have owned my car (22 years) - '67 400HP (3894382 aluminum intake)
I also thought it was carburetor-shaft-related, but after all three were rebuilt, a milder level of pooling/puddling returned even after carefully re-torquing in proper sequence...

I guess now I have two questions:
1. Is there any concern with loosening only one out of the 16 intake bolts (removing it; cleaning etc. as noted above) then re-torquing it back in place - adjacent to others that have been torqued for many years (20 yrs. in my case)? These puppies are notorious for cracked tabs and '67 400 intakes are a one-year-only part.

2. If I re-check torque on the remaining 15 bolts, now that I've been made aware oil may be lubricating them from the underside, should I be concerned that I may over-torque them because some (maybe not all) of the bolts may still be dry; but others may be "lubed" and there's no way to tell which is which?

I have no upcoming plans for re-judging my car and I do drive it (not as much as I'd like to), but I'd rather not have this puddle on my intake. I also don't want to risk cracking a tab for a mildly unsightly condition.

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Mark-------


There is no problem, whatsoever, in removing a bolt, cleaning, applying sealer and re-torquing.

It's not a bad idea to check the torque on all the manifold bolts using the torque sequence found in the SERVICE manual. The SERVICE manual spec for the bolts is 30 lb/ft. However, the PRODUCTION spec was 25-35 ft/lbs. So, if you torque the bolts to the SERVICE spec, you will have 5 ft/lbs of allowable "leeway". I don't think that any torque error due to lubricated bolts will exceed that. As a practical matter, I do not think that even if the error was 10 ft/lbs, which I doubt, there would be any problem.

[Mark F.]

Re: Oil Pool in Top Recess on Intake Manifold

thanks much, Joe.

My recollection is that I torqued them to 30 ft/lbs in multiple, gradual steps - and I definitely used the service manual sequence.

So, as you point out, the +/- extra 5 ft/lbs makes me feel better about doing it.

I do have a backup, original 382 intake - I just happen to like the one I have in the car now better...

thx,
Mark