Thread: Restoring Rusty
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Old 03-31-2018, 11:41 PM   #5357
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Join Date: Aug 2014
Location: Sacramento, CA
Posts: 5,350
Re: Restoring Rusty

Originally Posted by peabobble View Post
I'd check the intake gaskets.
I think you may be on to something, I remember when I pulled my Vortec heads at the junk yard from that 1999 Suburban I took pictures of the intake manifold gaskets that were on there cause I liked them, they were the Fel-Pro 98000. However when I wanted to buy them they only came in a gasket set which ran about $50, so I opted out, now I regret it

Today when I Googled that part number I came across this article:

Fel-Pro Introduces Solution to Intake Manifold Gasket Leaks on Millions of Vehicles.
Publication: Business Wire
Date: Thursday, October 14 2004
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SOUTHFIELD, Mich. -- Fel-Pro(R), the automotive service industry's premier brand of engine sealing technologies, has introduced an advanced PermaDryPlus(R) replacement intake manifold gasket design that solves chronic coolant leakage issues facing millions of light trucks and sport-utility vehicles.
Fel-Pro Gaskets, "The Gaskets Professionals Trust," are manufactured and marketed by Federal-Mogul Corporation (OTCBB:FDMLQ).

Available through Fel-Pro suppliers across North America, the brand's latest gasket innovation ensures a lasting seal on millions of domestic engines that rely on extended-life coolant and were factory-equipped with rigid nylon and molded rubber-type intake manifold gaskets. A broad range of domestic engines may be susceptible to these sealing issues. Immediate coverage of the new Fel-Pro solution is offered for General Motors 5.0L and 5.7L engines manufactured from 1996 through 2002. Additional coverage -- for select Ford (3.8L, 4.0L and 4.2L) and G.M. (3.1L, 3.4L and 4.3L) applications -- will be introduced in early 2005.

"It appears that on some engines, the use of conventional plastic-and-rubber gaskets in combination with the more aggressive 'OAT' (Organic Acid Technology) engine coolants has caused a significant number of sealing-related issues for consumers and automotive service providers," said Fel-Pro Chief Engineer Jerry Rosenquist. "Our team has spent the past two years developing and testing a variety of gasket technologies that can survive in this very difficult operating environment. (Dex Cool for those forum members who might not know)

"Our new PermaDryPlus gasket is absolutely the best answer for millions of engines exhibiting sealing problems induced by aggressive coolant chemistries and engine-specific dynamic issues."

The new Fel-Pro PermaDryPlus gasket features a high-strength aluminized steel carrier that is edge molded and encapsulated with a proprietary fluoroelastomer (FKM) material. In addition, the new gasket features three separate sealing beads around coolant ports to ensure a long-lasting seal under any situation.

A key element of the Fel-Pro design, the new FKM material was specifically formulated by Federal-Mogul chemists to resist OAT coolants. "We ran our final dyno test for 612 hours and the gasket looked so good it was difficult to distinguish it from an untested part," Rosenquist said.

"The steel provides the strength needed to resist cracking and crushing, and the FKM provides exceptional fluid sealing under all conditions. This design solves the primary leakage issue everyone knows about as well as other concerns typical of engines that have entered the repair cycle.

"The consumer and service provider recognize the problem by the coolant spots that are left on the ground. Unfortunately, retorquing the manifold bolts simply causes additional damage to the carrier, making the leakage much worse," Rosenquist added. Coolant ultimately can leak into the engine oil, causing significant damage to internal components, he said.

Fel-Pro engineers tested several gasket technologies before identifying the new encapsulated design as the best solution, according to Rosenquist. "Our ultimate design is the right choice by any measure - strength, fluid sealability, corrosion resistance, affordability, and ease of installation."
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