1948mack Posted May 12, 2008 Share Posted May 12, 2008 Hello,Great site.I've been reading for a a few days and done searchs, found lots of good info....I'm helping to get running a 1948 mack fire truck.. engine is ( EN330G- etc.)I'm looking for the valve clarence information both cold and hot setting???I'm also looking for timing spec's my books just don't go old enough...Thanks much,1948mack Quote Link to comment https://www.bigmacktrucks.com/topic/3741-engine-timing-and-valve-specs/ Share on other sites More sharing options...
engine2quarters Posted May 12, 2008 Share Posted May 12, 2008 Congradulations on the fire truck save.I've got a 1945 EG with the EN330 engine, so I should have some info around the office here someplace. I'll check the books tonite and see whot I can come up with.Keep an eye out for a Motor's Repair Manual. They're getting scarce and fetching a big buck, too.I'll let you know what I find out.jim (mass) Quote Link to comment https://www.bigmacktrucks.com/topic/3741-engine-timing-and-valve-specs/#findComment-18969 Share on other sites More sharing options...
engine2quarters Posted May 14, 2008 Share Posted May 14, 2008 Haven't forgotten you. Just can't find the right book yet. Quote Link to comment https://www.bigmacktrucks.com/topic/3741-engine-timing-and-valve-specs/#findComment-18999 Share on other sites More sharing options...
werkhorse Posted May 14, 2008 Share Posted May 14, 2008 (edited) righto here we go engine model: EN330Firing order: 153624Spark plug gap: .025"Timing mark:5 degree's BTC (mark located on Fltwheel)Cylinder head torque: 95-100 lb.ftValve seat angle: 30 degree'sValve clearance-HOT-: Intake .017" " " " " " " " " " " " " " : Exhaust .017 (note: no cold setting's)Valve spring pressure: 48lb @ 2.75"That help at all ??? ?? ??? I have more spec's here infront of me if needed like general electrical piston sizes etc. even have how to instruction's Edited May 14, 2008 by werkhorse Quote Link to comment https://www.bigmacktrucks.com/topic/3741-engine-timing-and-valve-specs/#findComment-19004 Share on other sites More sharing options...
engine2quarters Posted May 14, 2008 Share Posted May 14, 2008 Werkhorse got them. My 1952 issue of the Motor's Manual Lists Valve Clearance Intake .007 - .009, Exhaust .024 - .026, all HOT, no COLD. Wonder why the difference. You'd think ALL EN330 engines would have the same specs, atleast from the factory. Quote Link to comment https://www.bigmacktrucks.com/topic/3741-engine-timing-and-valve-specs/#findComment-19009 Share on other sites More sharing options...
engine2quarters Posted May 14, 2008 Share Posted May 14, 2008 Breaker gap .018 - .024 inch. About the thickness of the cover of a book of matches, I've been told. Quote Link to comment https://www.bigmacktrucks.com/topic/3741-engine-timing-and-valve-specs/#findComment-19010 Share on other sites More sharing options...
1948mack Posted May 15, 2008 Author Share Posted May 15, 2008 I would like to say, thanks for all the replies.. Today, We should get it running again. this time with out the miss, due too stuck valve..While it was torn down we change oil pan gasket, & did the top end of course...Did all The Brakes, wheel cyl and grease seals last month..That was a chore finding replacement brake's, got it done though..Thanks again,1948mack Quote Link to comment https://www.bigmacktrucks.com/topic/3741-engine-timing-and-valve-specs/#findComment-19019 Share on other sites More sharing options...
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