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Home » Public Forums » GMCnet » recommended 455 valve cover gasket (and process)
Re: recommended 455 valve cover gasket [message #329872 is a reply to message #329836] Sat, 10 March 2018 08:59 Go to previous messageGo to previous message
rgogan is currently offline  rgogan   United States
Messages: 82
Registered: February 2004
Location: Milwaukee, WI
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My GMC Motorhome shop manual recommends RTV only without a gasket citing superior results and stating the factory stopped using the gasket for the valve cover even though it is pictured in the manual. This is what I always used. I had a rebuilt engine put in 30,000 mi ago and now the valve cover on the driver's side is leaking. Will let you know if the rebuilder used a gasket or straight RTV when I take it apart.

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