1987 plenum runners
Thread Starter
Heel & Toe
Joined: Nov 2012
Posts: 23
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1987 plenum runners
I have now replaced the runner gaskets twice. I still have a vacuum leak on the intake manifold side of the left runner. I cannot find a torque for the mounting bolts. Is there any additive that I should use on the gaskets?
Any suggestion will be welcomed. Thanks, Ron
Any suggestion will be welcomed. Thanks, Ron
Drifting
Joined: Aug 2006
Posts: 1,624
Likes: 2
From: Canandaigua New York
some specifications are in lb. ft., and some are in lb. in.
Manifold to Runner Bolts 25 lb. ft.
Runner to Manifold Bolts 25 lb. ft.
Fuel Rail Attaching Bolts 15 lb. ft.
Throttle Body Attaching Bolts 18 lb. ft.
Throttle Position Sensor 18 lb. in.
Idle Air Control Valve 13 lb. ft.
Throttle Body Coolant Plate 27 lb. in.
Throttle Body Cover Plate 30 lb. in.
Power Brake Vacuum Fitting 108 lb. in.
Fuel Line Nuts 20 lb. ft.
Fuel Tube Bracket Bolt 25 lb. ft.
Fuel Pressure Connection 115 lb. in.
Pressure Regulator Base to Rail 44 lb. in.
Pressure Regulator Bracket 44 lb. in.
Outlet Tube to R/H Rail Retainer 44 lb. in.
http://tpiparts.net/tpi_torque_specifications
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Le Mans Master
Joined: Nov 2009
Posts: 6,882
Likes: 234
From: Bangkok, Thailand
If you want to be able to re-use them, just use chapstick on them.
It's possible you're getting the wrong gaskets too. The early TPI is a little different from the later ones as far as EGR tubes go. Not sure if the gaskets are different for them or not, but I know the TPIS set that I bought for my Accel runners didn't fit well at all.
Team Owner
Joined: Dec 2000
Posts: 21,094
Likes: 282
From: Phila., PA burbs
Is everything installed on the correct sides? Not sure about early TPIs, but on later years the runners, as well as gaskets are side specific. Installation on the wrong side can cause vacuum leaks.
Thread Starter
Heel & Toe
Joined: Nov 2012
Posts: 23
Likes: 0
87 runners
I am certain they are installed the same way I removed them. the problem is on the left front runner / manifold side. When I spray either in this area the idle smooths out and idle increases. I am going to take a much closer look when I dismantle. I 'm wondering if a runner can warp resulting in a poor fit to the manifold. I will use the permatex as you suggested and double check the new gaskets for proper fit. Thank you very much for your input. If you think of anything else please let me know
Team Owner
Joined: Sep 2003
Posts: 20,176
Likes: 673
From: Freedom is never more than one generation away from extinction.
St. Jude '03 thru '24
The Right Stuff Gasket maker finally stopped the leaks on my valve covers!
It hardens up nicely and remains pliable.
A light film on both sides of the gasket maybe helpfull.
It hardens up nicely and remains pliable.
A light film on both sides of the gasket maybe helpfull.
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Thread Starter
Heel & Toe
Joined: Nov 2012
Posts: 23
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