R Cubed Posted May 12, 2007 Share Posted May 12, 2007 Hi all, just a quick question thought it was time to change the spark plugs in the 352 and wondered what other people use ? what make and type etc. R Cubed Quote Link to comment Share on other sites More sharing options...
Chappers Posted May 21, 2007 Share Posted May 21, 2007 Hi , I use NGK B6S (Seem to work best) or Champion J8C hope that helps Regards Steve Quote Link to comment Share on other sites More sharing options...
abn deuce Posted October 20, 2007 Share Posted October 20, 2007 other choices would be NAPA # ECH RR174 or champion J8C or AC 45 or new Autolite 295 . Quote Link to comment Share on other sites More sharing options...
Tony B Posted October 21, 2007 Share Posted October 21, 2007 Is it just me or is Champion J8 the Amnerican WW2 standard plug? I agree with Steve, all mine are now eating NGK B6S with no problems. Quote Link to comment Share on other sites More sharing options...
abn deuce Posted October 21, 2007 Share Posted October 21, 2007 as far as i know it was the standard for the CCKW , AFKWX, DUKW also the 1/2 ton dodge wc, 3/4 ton Dodge wc , MB,GPW ,Mack NM and Weasel Quote Link to comment Share on other sites More sharing options...
Tony B Posted October 21, 2007 Share Posted October 21, 2007 The little Chore Horse charging set also runs on them. Quote Link to comment Share on other sites More sharing options...
abn deuce Posted October 21, 2007 Share Posted October 21, 2007 its very possable a valid cross over , I m using a reference made by " Portrayal Press" dated 1987 so there are likely other brands available now that weren't then . Quote Link to comment Share on other sites More sharing options...
N.O.S. Posted October 21, 2007 Share Posted October 21, 2007 Hi , I use NGK B6S (Seem to work best) Me too R3, NGK seem to stay a lot cleaner than Champion, people say they "run hotter" :dunno: Diesel is my favourite brew :whistle: Quote Link to comment Share on other sites More sharing options...
abn deuce Posted October 21, 2007 Share Posted October 21, 2007 thats the basic difference in plugs is the heat range they work at and the reach into the chamber . In reading the chart again they do list from hotter to cooler plugs that depends on how the engine is run slower speed and lots of stop and go you would use a hotter plug to prevent fouling or pre-ignition for much long distance driving a cooler plug would be advisable for example the hottest champion is hot< j11 j8 j7 j6 > cold Quote Link to comment Share on other sites More sharing options...
R Cubed Posted October 22, 2007 Author Share Posted October 22, 2007 So with that in mind then if say the truck gets runs on dual carridgeways would be good to go for say j7 ? Quote Link to comment Share on other sites More sharing options...
N.O.S. Posted October 22, 2007 Share Posted October 22, 2007 OK, but why would a cooler plug be an advantage for highway work? Why not use a hot plug for it's anti fouling properties for all applications? dieseljockey Quote Link to comment Share on other sites More sharing options...
abn deuce Posted October 22, 2007 Share Posted October 22, 2007 Those are very good questions but I don't have the answers, perhaps one of the other Mechanic's can give us all the answer. Quote Link to comment Share on other sites More sharing options...
R Cubed Posted October 23, 2007 Author Share Posted October 23, 2007 The reason, I think is hotter plugs are better when pottering around as there is not so much heat build up in the cylinders and there is more chance of a bit of oil getting in there, where on a dual carridgeway the engine is under a constant load and high revs for some time so using hotter plugs can cause hot spots on the pistons and at worst case melt a hole in the piston :shake: I could be wrong so please put me in my place.......... Quote Link to comment Share on other sites More sharing options...
Tony B Posted October 23, 2007 Share Posted October 23, 2007 Anyone got an old Champion J8? I need one for a static disply on the charge set. The original is thick rust. Doesn't have to work just look right. Quote Link to comment Share on other sites More sharing options...
Richard Farrant Posted October 23, 2007 Share Posted October 23, 2007 Anyone got an old Champion J8? I need one for a static disply on the charge set. The original is thick rust. Doesn't have to work just look right. Just look for an old Suffolk lawn mower engine, same plug (J8) in them as Bedford, GMC................ Quote Link to comment Share on other sites More sharing options...
Tony B Posted October 23, 2007 Share Posted October 23, 2007 TA :-D Probably need the silencer off something similar as well for the working one. Quote Link to comment Share on other sites More sharing options...
42 chevy Posted December 28, 2008 Share Posted December 28, 2008 AC 44 was the plug installed at the factory. This plug is now obsolete, as AC only makes plugs in odd numbers now (ie 43, 45). The higher the number, the "hotter" the plug is. You can use a 43 in severe sevice (running on a highway all day). AC 44's do show up on ebay every so often. http://cgi.ebay.com/8-AC-44-GREEN-RING-Spark-Plugs-50s-60s-Chevy-Corvette_W0QQitemZ260336269612QQcmdZViewItemQQptZMotors_Car_Truck_Parts_Accessories?hash=item260336269612&_trksid=p3286.c0.m14&_trkparms=72%3A570%7C66%3A1%7C65%3A12%7C39%3A1%7C240%3A1318%7C301%3A1%7C293%3A1%7C294%3A25 this is a link to a current auction on ebay US. John Gott Quote Link to comment Share on other sites More sharing options...
Degsy Posted December 28, 2008 Share Posted December 28, 2008 I use NGK BP6HS or if you need a suppressed version BPR6HS. Quote Link to comment Share on other sites More sharing options...
R Cubed Posted December 30, 2008 Author Share Posted December 30, 2008 How have you got on with them Degsy ? Well since I have changed the old plugs which have been in there since I have had the truck ( 11 years ) I have not noticed any difference with the new Champion ones ? Does this mean the old ones are still fine ? :idea: Quote Link to comment Share on other sites More sharing options...
N.O.S. Posted December 30, 2008 Share Posted December 30, 2008 Does this mean the old ones are still fine ? :idea: Or does it mean the new ones are just as (£$& as the old ones? :-D:-D NGKN.O.S. Quote Link to comment Share on other sites More sharing options...
R Cubed Posted December 30, 2008 Author Share Posted December 30, 2008 Ha b_____ Ha, well if the new ones are as bad as the old ones it still runs fine, starts what ever the weather, hot, cold stood for months or just had a 30 mile run down the road, so can't be all bad :idea: I hope.. Quote Link to comment Share on other sites More sharing options...
Degsy Posted December 30, 2008 Share Posted December 30, 2008 Or does it mean the new ones are just as (£$& as the old ones? :-D:-D NGKN.O.S. :rofl::rofl::rofl::rofl: 11 years, Hmmm, surely your fuel consumption must have improved with the new ones. I thought I was supposed to be a tight Tyke but.......:??? To answer your question I find them excellent, good starting, crisp acceleration and economical cruising, when in convoy with other GMC's I always seem to have a bit in hand performance wise.:-D Quote Link to comment Share on other sites More sharing options...
R Cubed Posted December 30, 2008 Author Share Posted December 30, 2008 Fuel !!!! Not much difference most strange, I cant make it out. Its always pulled steadily but seems to get left behind on hills where other GMC just keep pulling away :???:???:???:???:???:???:??? I need to drive some other GMC to find out how my truck compares ..... Any offers Quote Link to comment Share on other sites More sharing options...
Degsy Posted December 30, 2008 Share Posted December 30, 2008 Sounds like a thorough tune up would be in order. If it hasn't been touched for a while I would expect it to show up under those circumstances. Quote Link to comment Share on other sites More sharing options...
R Cubed Posted December 30, 2008 Author Share Posted December 30, 2008 A tune up !!!!!!!! So what sort of things would you suggest ? Fuel system / filters all clean not touched the carb but exhaust is not sooty and does need a little choke to start when cold. Timing set and does not miss a beat air filter washed out and re oiled. ????????????????? Quote Link to comment Share on other sites More sharing options...
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