Intake manifold leak
Thread Starter
Instructor
Joined: Oct 2002
Posts: 200
Likes: 0
From: Euless TX
Intake manifold leak
I'm seeing an accumalation of what appears to be oil on my intake manifold, on the drivers side, under the water neck. Is this probably oil leeching up past a loose bolt? It looks like I'll have to remove a bunch of stuff to get a socket on to tighten it.
Team Owner
Joined: Dec 2000
Posts: 90,675
Likes: 304
From: SE NY
Cruise-In II Veteran
Re: Intake manifold leak (91z07)
Indeed it sounds like that; those intake base bolts go through the heads and into the galley area.
If the two local bolts are very loose you might try just tightening them, otherwise you might try this:
-remove the suspected bolts
-chase the threads on bolts and in the heads
-apply Permatex #2 to the bolt threads
-torque those bolts to spec
I believe you will need to remove the plenum and runners to access most of the intake base bolts. They take about 35 ft-lb of torque so make sure your Torx socket bit is at a perfect angle to keep from stripping the bolt heads or the bit.
If the two local bolts are very loose you might try just tightening them, otherwise you might try this:
-remove the suspected bolts
-chase the threads on bolts and in the heads
-apply Permatex #2 to the bolt threads
-torque those bolts to spec
I believe you will need to remove the plenum and runners to access most of the intake base bolts. They take about 35 ft-lb of torque so make sure your Torx socket bit is at a perfect angle to keep from stripping the bolt heads or the bit.
Team Owner
Joined: May 2002
Posts: 24,337
Likes: 25
From: San Diego , CA Double Yellow DirtBags 1985..Z51..6-speed
Re: Intake manifold leak (65Z01)
I had this problem after resealing my intake manifold base.
I just removed the upper intake pieces, pulled the bolt out, gooped more black RTV on it, and torqued it back down.
Problem solved. :thumbs:
I just removed the upper intake pieces, pulled the bolt out, gooped more black RTV on it, and torqued it back down.
Problem solved. :thumbs:
