Phr Posted January 3, 2020 Report Posted January 3, 2020 (edited) First Happy new year 2020 About my new yorker 53 I have read on manual that recommended spark plugs are Autolite Spark Plugs 4GS-150 the one that were on the car when I bought it were NGK BP4 but there is a difference ..... AUTOLITE reach is 3/4" and NGK is .372" Does anyone knows what is the correct spark plug reach for the HEMI 1953 V8 fire power 5.4 L ? Edited January 3, 2020 by Phr Quote
Plymouthy Adams Posted January 3, 2020 Report Posted January 3, 2020 4S-140 by Autolite was the stock plug fitted on 53 Chrysler V8 (source Motors manual, tune up specs) Quote
James_Douglas Posted January 3, 2020 Report Posted January 3, 2020 My 1962 MOPAR "Fast moving parts Catalog" says a 1954 V8 uses a Champion XN-16Y. It also show the cross reference to an autolite AGR52 and AGR82 and that they are all Projected core nose plugs. James. Quote
Plymouthy Adams Posted January 3, 2020 Report Posted January 3, 2020 the plugs changed even from the factory from the 53 model as found in the 54.... Quote
Phr Posted January 3, 2020 Author Report Posted January 3, 2020 (edited) Well finally I’ve found that on a Chrysler shop manual about 1953 vehicules on C56 It should be Autolite Spark Plugs 4GS-150 maybe the reason why actual spark plugs 3/8 ‘’ reach. turn black after low mileage runs ! Edited January 3, 2020 by Phr Quote
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