GMNA GM209M Engine Cover Fastener Grommets
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GMNA GM209M Document Information:
Title
Engine Cover Fastener Grommets
General Motors North America
Publication Date:
Oct 1, 2002
Scope:
1 Scope
This document covers the requirements of rubber (55 to 80 hardness) used for fastener isolator grommets. Test requirements for approved compounds are intended to permit usage in the described tem perature and engine fluid exposure environments. Currently only Class B compounds are defined. Silicone (VMQ) grommets not meeting Table 1volatility limits can't be used in internal, direct oil exposed applications (e.g. PCV vent grommets or center bolt grommets on engine covers). These compounds will be designated with a grade 1 restriction (see 7.1). For all other grommets, see GM221M.
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