frd1419 Posted May 3, 2009 Share Posted May 3, 2009 Upon researching my running problems I found out that thr distributor in my motor is one for a clockwise rotation not counter clockwise. Any one know the correct one for my 41 type 45 with a EN-330 motor Fred Quote Link to comment https://www.bigmacktrucks.com/topic/9257-correct-distributor/ Share on other sites More sharing options...
Greg Rider Posted May 3, 2009 Share Posted May 3, 2009 Are you sure it is wrong? I don't know the rotation direction but you could double check the order of your plug wires. I will get you the Delco number off of my truck for you on Sunday. NAPA had a part number for a replacement, I'll look it up also. Quote #1 on A-model registryIf I drink because of work, why can't I drink at work? Link to comment https://www.bigmacktrucks.com/topic/9257-correct-distributor/#findComment-34658 Share on other sites More sharing options...
frd1419 Posted May 3, 2009 Author Share Posted May 3, 2009 (edited) When Im looked up my delco dist number in the motor book. my number 1110057 is listed as a clockwise rotation. The book from the Mack museum on my truck calls for a counter clockwise rotation. I pulled the cap off and cranked the motor and it spins counter clockwise. Edited May 3, 2009 by frd1419 Quote Link to comment https://www.bigmacktrucks.com/topic/9257-correct-distributor/#findComment-34664 Share on other sites More sharing options...
Greg Rider Posted May 3, 2009 Share Posted May 3, 2009 My 1951 truck has the EN330 engine. My distributer tag # is ; Model 1111819. The replacement part number at NAPA for mine is 1111843. The Delco system was used in a lot of engines, tractors, pumps, welders, etc.. Also, a Pertronix conversion is available and that number is 1166. I still cant figure how a reverse rotation would fit because of the drive gear on the camshaft. I am not saying it didn't or implying your wrong, please don't think that, weird s**t happens. Quote #1 on A-model registryIf I drink because of work, why can't I drink at work? Link to comment https://www.bigmacktrucks.com/topic/9257-correct-distributor/#findComment-34674 Share on other sites More sharing options...
Rob Posted May 3, 2009 Share Posted May 3, 2009 I still cant figure how a reverse rotation would fit because of the drive gear on the camshaft. I am not saying it didn't or implying your wrong, please don't think that, weird s**t happens.Sounds to me like a different distributor housing has been used in the past possibly when the original wore out in the bore. The tag should have been changed at that time. If it drives the engine oil pump, it cannot rotate backwards or the engine will not oil itself.A distributor does not care which direction it rotates. The only differences are the advance units that are built in whether it be mechanical, or vacuum. The breaker plate needs to move as per the advance curve that is designed into it. However, even if it were rotating reverse rotation, the rerouting of the firing order wiring would make this null at an idle and through normal operating speed range.A compression check, (wet, and dry) are the first order of business when diagnosing low vacuum signals, or misfiring cylinders. A multitude of deficiencies can cause the problems you bring up and that is where I start.Rob Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment https://www.bigmacktrucks.com/topic/9257-correct-distributor/#findComment-34680 Share on other sites More sharing options...
Greg Rider Posted May 3, 2009 Share Posted May 3, 2009 Firing order is 1-5-3-6-2-4. Like rob said, sounds like your housing was changed due to age. Easy way to check vacuum leaks is get her running then spray starting fluid around questionable areas, and if the engine revs, bingo. Quote #1 on A-model registryIf I drink because of work, why can't I drink at work? Link to comment https://www.bigmacktrucks.com/topic/9257-correct-distributor/#findComment-34687 Share on other sites More sharing options...
frd1419 Posted May 4, 2009 Author Share Posted May 4, 2009 (edited) Here is the pictures of the distributor, I took it out between rain drops. As you can see it is easy to put in the wrong one. The gears are in the lower pedestal which connects the tachometer and oil pump. The firing order is correct. When the rain stops I will do a compression test. The advance does advance clockwise opposite the counterclockwise rotation. Edited May 4, 2009 by frd1419 Quote Link to comment https://www.bigmacktrucks.com/topic/9257-correct-distributor/#findComment-34735 Share on other sites More sharing options...
engine2quarters Posted May 5, 2009 Share Posted May 5, 2009 Does it make a difference if it is an EN-330 or a M330? Just wondering. Quote Link to comment https://www.bigmacktrucks.com/topic/9257-correct-distributor/#findComment-34788 Share on other sites More sharing options...
engine2quarters Posted May 5, 2009 Share Posted May 5, 2009 Does it make a difference if it is an EN-330 or a M330? Just wondering.Looks like distributor can be put in 180 degrees out if not careful. Check #1 cyclinder vs the rotor position. Quote Link to comment https://www.bigmacktrucks.com/topic/9257-correct-distributor/#findComment-34789 Share on other sites More sharing options...
engine2quarters Posted May 5, 2009 Share Posted May 5, 2009 Fred....does your engine also have a Magneto unit on it? Quote Link to comment https://www.bigmacktrucks.com/topic/9257-correct-distributor/#findComment-34792 Share on other sites More sharing options...
engine2quarters Posted May 6, 2009 Share Posted May 6, 2009 I just sent Fred a PM (well a couple of them), and something occurred to me. Way back when, they used to use the Continental '330' motors in fork lifts, with the fan facing the back, with the multi speeds while going in the direction the forks pointed. Was that '330' engine different from the '330' engines used in the '40's fire truck? Quote Link to comment https://www.bigmacktrucks.com/topic/9257-correct-distributor/#findComment-34793 Share on other sites More sharing options...
frd1419 Posted May 9, 2009 Author Share Posted May 9, 2009 Just did a compression test now that the rain just let up. It ranged 105-110 psi. dry (forgot to bring any oil. Fred Quote Link to comment https://www.bigmacktrucks.com/topic/9257-correct-distributor/#findComment-34950 Share on other sites More sharing options...
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