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  #1  
Old 07-19-2008, 01:41 PM
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Join Date: Apr 2004
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Spark plugs taper vs gasket seal?

I just replaced my spark plugs. The parts store sold me Bosch plugs with a gasket seal. The old plugs were tapered without a gasket. Is there any problem using either type of seal?

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  #2  
Old 07-19-2008, 02:06 PM
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Which engine are they going in?
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Old 07-19-2008, 04:51 PM
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It is a 103 engine. 1991 300E 4matic.
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Old 07-19-2008, 06:25 PM
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The 103 engine uses a tapered seat plug. The gasket seat plugs are wrong for the application. I do not recommend to use them. You should take them back for a refund or exchange.
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  #5  
Old 07-23-2008, 02:27 PM
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Join Date: Jun 2005
Location: Richmond, Va
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Spark plugs taper v. gasket

Tapered seat plugs are not interchangeable with flat metallic gasketed plugs.
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  #6  
Old 07-23-2008, 05:03 PM
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Just ordered the correct plugs from Phil. He advised to get two sets as Bosch no longer makes this plug. Will replace the gasketed plugs right away. Thanks for the input.

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