jaked92 Posted March 23, 2008 Share Posted March 23, 2008 I cannot get 401 Maxidyne gas engine started although timing is correct,,new points etc,,and with the way it is misfiring and will not start it has been suggested possibly #1 cylinder is not at the radiator but is located at the firewall. Does anyone know if this is the case? Quote Link to comment https://www.bigmacktrucks.com/topic/3541-where-is-1-cylinder-401-gas/ Share on other sites More sharing options...
Maddog13407 Posted March 24, 2008 Share Posted March 24, 2008 #1 Cylinder is at the front, or radiator Quote Link to comment https://www.bigmacktrucks.com/topic/3541-where-is-1-cylinder-401-gas/#findComment-17783 Share on other sites More sharing options...
theakerstwo Posted March 24, 2008 Share Posted March 24, 2008 Next to # 2 isnt it. ha ha ha ha Quote glenn akers Link to comment https://www.bigmacktrucks.com/topic/3541-where-is-1-cylinder-401-gas/#findComment-17793 Share on other sites More sharing options...
ciw65 Posted March 24, 2008 Share Posted March 24, 2008 Was the engine running recently, if not double check that the dizzy is in correctly, not 180 cam degrees out. This will cause misfiring and carry on when trying to start, but will show up on a timing light as correct timing Quote Link to comment https://www.bigmacktrucks.com/topic/3541-where-is-1-cylinder-401-gas/#findComment-17794 Share on other sites More sharing options...
HK Trucking Posted March 24, 2008 Share Posted March 24, 2008 I cannot get 401 Maxidyne gas engine started although timing is correct,,new points etc,,and with the way it is misfiring and will not start it has been suggested possibly #1 cylinder is not at the radiator but is located at the firewall. Does anyone know if this is the case?MagnadyneAre the plug wires installed correctly?Firing order 1-5-3-6-2-4 Quote "If You Can't Shift It Smoothly, You Shouldn't Be Driving It" Link to comment https://www.bigmacktrucks.com/topic/3541-where-is-1-cylinder-401-gas/#findComment-17796 Share on other sites More sharing options...
jaked92 Posted March 24, 2008 Author Share Posted March 24, 2008 Thanks guys,,yes #1 is at the rad,,,next to number 2,,,seems the problem is stuck intake valves on #2,3,4 and 5,,,looks like the head has to come off,,,tried freeing up # 2 through the side cover but it is really stiff and the rest will be nearly impossible to get any leverage on,,can't believe how much prying pressure to get ér down,,,We had the truck running last summer and pretty dissappointing to see this mess... This whole problem started with pouring gas down carb to start engine,,,,later found carb plugged,,the gas washed all the oil off valves leaving it to rust over the winter,,,Ya ,,,whoa is me Quote Link to comment https://www.bigmacktrucks.com/topic/3541-where-is-1-cylinder-401-gas/#findComment-17799 Share on other sites More sharing options...
mackmixer Posted March 24, 2008 Share Posted March 24, 2008 You might try fogging some oil, i.e. auto transmission fluid and penetrating oil, in the cylinders and valve stems and guides to see if they will loosen up. Let it soak for several hours, preferably overnight.Make sure to leave your plugs out while rotating the engine. Liquids don't compress very well.Good luck. Quote David Link to comment https://www.bigmacktrucks.com/topic/3541-where-is-1-cylinder-401-gas/#findComment-17809 Share on other sites More sharing options...
CML Service Posted March 25, 2008 Share Posted March 25, 2008 Stuck valves seem common on flatheads. After a good spray of penetrating oil I use an allen wrench inserted through the plug holes. The angle can get you directly over the valve then a tap with the hammer will usually set then into place. After they drop into place crank the engine and repeat the process on the remaining stuck ones. I have neighbors that seem to have stuck valves in thier irrigation pump engines each year. Thats how I take care of them. Chuck Quote Link to comment https://www.bigmacktrucks.com/topic/3541-where-is-1-cylinder-401-gas/#findComment-17812 Share on other sites More sharing options...
jaked92 Posted March 25, 2008 Author Share Posted March 25, 2008 Stuck valves seem common on flatheads. After a good spray of penetrating oil I use an allen wrench inserted through the plug holes. The angle can get you directly over the valve then a tap with the hammer will usually set then into place. After they drop into place crank the engine and repeat the process on the remaining stuck ones. I have neighbors that seem to have stuck valves in thier irrigation pump engines each year. Thats how I take care of them. ChuckThanks,,I will fog,,pour transmission oil down cylinders and tap at valves through plug holes.. I really don't want to remove head. Fortunately a blizzard rolled through today so I did not start removing head. OT I have been delivering some Mack Pinnacles with Volvo engines and 18 speed automatics,,,the epitamy of laziness for the driver but they work really well,,usually grossing 130k with A-trains Quote Link to comment https://www.bigmacktrucks.com/topic/3541-where-is-1-cylinder-401-gas/#findComment-17828 Share on other sites More sharing options...
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