Missing Intake Manifold Bolt!!!!!
Thread Starter
Race Director
Joined: Aug 2003
Posts: 11,043
Likes: 3
From: San Jose Pat Tillman - American Hero
Missing Intake Manifold Bolt!!!!!
When I was battling my serpentine belt last night, I noticed that the forward-most bolt (by the TB) on the driver's side of the intake manifold is non-existent. I have no idea how long it's been this way, but I imagine it'd be good to get it fixed ASAP.
Stealership for this one, or what?
Stealership for this one, or what?
Le Mans Master
Joined: Jan 2003
Posts: 5,858
Likes: 7
From: Santa Maria CA
Re: Missing Intake Manifold Bolt!!!!! (Perfusion)
I beleive the LT1/LT4 intakes are "dry" intakes. Meaning that no coolant is circulated thought the intake base like the L98 base for example, that requires thread sealant on the intake bolt to prevent coolant leakage. Sounds like you have not had any problems this whole time without that bolt. I would promptly install a new one to make sure the intake is sealing properly against the head in that corner.
[Modified by 86PACER, 1:54 AM 4/16/2004]
[Modified by 86PACER, 1:54 AM 4/16/2004]
Team Owner
Joined: May 2002
Posts: 24,337
Likes: 25
From: San Diego , CA Double Yellow DirtBags 1985..Z51..6-speed
Re: Missing Intake Manifold Bolt!!!!! (86PACER)
On mine, that bolt goes into an oil passage in the head.. I had oil seep up through it after R&Ring the intake base.
I pulled it out and put RTV on it.. and torqued it back down.
If yours is dry, then just get a new bolt and throw it in, you'll be fine. There's 12 bolts on there for a reason, and it's not because 11 isn't enough.
I pulled it out and put RTV on it.. and torqued it back down.
If yours is dry, then just get a new bolt and throw it in, you'll be fine. There's 12 bolts on there for a reason, and it's not because 11 isn't enough.
Team Owner
Joined: Aug 2000
Posts: 40,156
Likes: 45
From: San Pedro CA
Re: Missing Intake Manifold Bolt!!!!! (86PACER)
I beleive the LT1/LT4 intakes are "dry" intakes. Meaning that no coolant is circulated thought the intake base like the L98 base for example, that requires thread sealant on the intake bolt to prevent coolant leakage. Sounds like you have not had any problems this whole time without that bolt. I would promptly install a new one to make sure the intake is sealing properly against the head in that corner.
I agree with Central Coaster, too. install a new bolt. If it ain't leaking, thats great, but at the front, it helps keep the intake/block seal from leaking.
Melting Slicks
Joined: Apr 2000
Posts: 3,198
Likes: 2
From: Northern CA
Re: Missing Intake Manifold Bolt!!!!! (JasonL)
http://shell2.lomag.net/~jhliao/other/DSC01361.jpg
I borrowed that pic from a friend, hope he doesn't mind :D It shows the two "missing" bolts near the corner, I assume that's the one you're talking about. I just looked on my stock LT4 as well... the hole closer to the rear is for the alternator/AC bracket. The hole closer to the front is unused. I suspect it may be for the B- or F-body accessory setup.
I borrowed that pic from a friend, hope he doesn't mind :D It shows the two "missing" bolts near the corner, I assume that's the one you're talking about. I just looked on my stock LT4 as well... the hole closer to the rear is for the alternator/AC bracket. The hole closer to the front is unused. I suspect it may be for the B- or F-body accessory setup.
Thread Starter
Race Director
Joined: Aug 2003
Posts: 11,043
Likes: 3
From: San Jose Pat Tillman - American Hero
Re: Missing Intake Manifold Bolt!!!!! (JasonL)
http://shell2.lomag.net/~jhliao/other/DSC01361.jpg
I borrowed that pic from a friend, hope he doesn't mind :D It shows the two "missing" bolts near the corner, I assume that's the one you're talking about. I just looked on my stock LT4 as well... the hole closer to the rear is for the alternator/AC bracket. The hole closer to the front is unused. I suspect it may be for the B- or F-body accessory setup.
I borrowed that pic from a friend, hope he doesn't mind :D It shows the two "missing" bolts near the corner, I assume that's the one you're talking about. I just looked on my stock LT4 as well... the hole closer to the rear is for the alternator/AC bracket. The hole closer to the front is unused. I suspect it may be for the B- or F-body accessory setup.
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