centerbolt cover leaks
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Junior Member
Joined: Aug 2007
Posts: 54
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From: denton, tx
Car: 1990 formula 305 tbi
Engine: 305 tbi
Transmission: 700r4
Axle/Gears: 3.73
centerbolt cover leaks
i've searched around for a bit, and found quite a bit of info on leaky valve covers, but none of them answered my questions.
my stock valvecovers are leaking oil out of the 4 bolt holes on the top of both of them, as well as out of the oil cap. They aren't leaking at all around the perimeters of the covers though. I have tightened all of the bolts on top, got a new pcv valve, as well as a new oil cap, but it hasn't stopped it from leaking at all.
i feel like this is a very easy fix, but i am clueless.....does anyone know what could be causing this?
my stock valvecovers are leaking oil out of the 4 bolt holes on the top of both of them, as well as out of the oil cap. They aren't leaking at all around the perimeters of the covers though. I have tightened all of the bolts on top, got a new pcv valve, as well as a new oil cap, but it hasn't stopped it from leaking at all.
i feel like this is a very easy fix, but i am clueless.....does anyone know what could be causing this?
Junior Member
Joined: Sep 2003
Posts: 45
Likes: 0
From: New Mexico
Car: 1990 RS
Engine: Mild 396 Smallblock
Transmission: TCI Streetfighter turbo 350
Axle/Gears: 3.73 10 bolt Strange Posi
Re: centerbolt cover leaks
Have you tried using an O-ring on your four hold down bolts? I used that trick before I switched to perimiter bolt aluminums.
Thread Starter
Junior Member
Joined: Aug 2007
Posts: 54
Likes: 0
From: denton, tx
Car: 1990 formula 305 tbi
Engine: 305 tbi
Transmission: 700r4
Axle/Gears: 3.73
Re: centerbolt cover leaks
i haven't tried o rings yet, but that definitely makes sense. what would i do about my oil cap leaking as well?
Thread Starter
Junior Member
Joined: Aug 2007
Posts: 54
Likes: 0
From: denton, tx
Car: 1990 formula 305 tbi
Engine: 305 tbi
Transmission: 700r4
Axle/Gears: 3.73
Re: centerbolt cover leaks
i set up a second pcv valve on the passenger side so that there would be one on both sides, and made both pcv lines run to a T connector in front of the tb, so far the leaks have gone away.
Supreme Member
Joined: Oct 2006
Posts: 1,974
Likes: 0
Car: 91 RS
Engine: 350 vortec
Transmission: T-5
Axle/Gears: not the best not the worst
Re: centerbolt cover leaks
okay now you should take out the second PCV and put the breather back in... and use a little RTV around the bolt heads and install that new "working" PCV on the driverside... that way you have 1 functioning PCV and 1 functioning breather....
NOT 2 of either
NOT 2 of either
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