Author Topic: Intake Manifold Oil Seepage  (Read 1642 times)


  • Member
  • ***
  • Posts: 195
    • View Profile
Intake Manifold Oil Seepage
« on: August 03, 2021, 03:03:30 AM »
68 Camaro 350 with Edelbrock performer intake manifold.   Getting a little oil seepage around center bolts.  No problem for 400-500 miles then slight seepage starts again.  Before resealing I always clean the bolts in solvent, clean the bolt holes & run a pipe thread reamer to be sure there's no residue/oil, etc, in the bolt holes.   I use ARP thread sealer.   Any suggestions for a better thread sealant?   How about Permatex High Performance Sealant 56521?


  • Hero Member
  • *****
  • Posts: 1853
    • View Profile
Re: Intake Manifold Oil Seepage
« Reply #1 on: August 03, 2021, 04:45:06 AM »
Use Permatex non-hardening thread sealant (or Form-a-Gasket, old #2) - definitely oil resistant, I've always used it to seal head bolts, never failed me yet in 50 years of engine rebuilding. The only thing I dislike about it - don't get it on your hands or clothes (or anything else you don't want stained), it's a real pain to get off of you once it gets there. Great stuff -

« Last Edit: August 03, 2021, 05:05:27 AM by z28z11 »
1968 Z28 M21/U17 BRG/W 1967 Chevy ll Nova SS 
1969 Z28 X77/M20/VE3 LeMans/W
1969 L78 X66/N66 Cortez/BVT
1969 Z11 L48/M35/C60/C06  1949 3100 5wd 235/6