Retired	Intake valves making contact with spark plug	#1
Not too shy to talk Joined: 2023/7/22 21:12 Last Login : Yesterday 22:00 From Ohio Group: Registered Users Posts: 22	Greetings, We noticed on our 1936 Business Coupe 8 cylinder that in two of the cylinders the gap on the spark plugs are completely closed due to making contact with the intake valves. After pulling the plugs we can see the contact points on the valves and plugs. Any thoughts or suggestions? Posted on: Yesterday 19:59

BigKev	Re: Intake valves making contact with spark plug	#2
Webmaster Joined: 2006/4/17 13:30 Last Login : Today 9:02 From North Aurora, IL Group: Webmasters Registered Users Posts: 11767	Are you using the right plugs? Perhaps they are too long of a reach. Posted on: Yesterday 20:05
	-BigKev 1954 Packard Clipper Deluxe Touring Sedan -> Registry | Project Blog 1937 Packard 115-C Convertible Coupe -> Registry | Project Blog

Ross	Re: Intake valves making contact with spark plug	#3
Home away from home Joined: 2008/3/21 20:20 Last Login : Today 7:19 Group: Registered Users Posts: 2959	This not too unusual if the head has been heavily milled in the past. If your plugs are correct then the simplest expedient is to use an extra copper washer under each plug to lift them up a bit. Posted on: Yesterday 20:39

TxGoat	Re: Intake valves making contact with spark plug	#4
Home away from home Joined: 2023/4/14 11:11 Last Login : Today 8:36 From 76481 Group: Registered Users Posts: 1006	Could be weak valve springs... wrong valves.... thin head... wrong plugs or old plug gaskets. Posted on: Yesterday 20:46

Retired	Re: Intake valves making contact with spark plug	#5
Not too shy to talk Joined: 2023/7/22 21:12 Last Login : Yesterday 22:00 From Ohio Group: Registered Users Posts: 22	All sounds logical and like great advice. I have a shop manual for 1937-38. I assume the 8cyl. would be the same in the 36. The manual calls for champion Y-4’s, there are currently J-8’s in the engine. I know the numbers pertains to the heat range, What does the letter refer to? Thanks Posted on: Yesterday 22:01

su8overdrive	Re: Intake valves making contact with spark plug	#6
Home away from home Joined: 2009/7/13 16:31 Last Login : Yesterday 22:05 From Walnut Creek, CA Group: Registered Users Posts: 682	Have used nothing but 10mm AC M8 sparkplugs in my Packards since the late '70s. Luckily for us, they seem to be the right heat range. They're probably still available at NAPA, etc. because so many old Chevy cars and pick ups in Mexico, Latin and South America. They also fit 1936-on Cadillac, '37-on LaSalle, Buicks. Posted on: Yesterday 22:08

BigKev	Re: Intake valves making contact with spark plug	#7
Webmaster Joined: 2006/4/17 13:30 Last Login : Today 9:02 From North Aurora, IL Group: Webmasters Registered Users Posts: 11767	Nearly all the shop manuals are in the Literature Archive here on the website. Posted on: Today 6:47
	-BigKev 1954 Packard Clipper Deluxe Touring Sedan -> Registry | Project Blog 1937 Packard 115-C Convertible Coupe -> Registry | Project Blog