stephenellis Posted May 12, 2013 Share Posted May 12, 2013 can anyone please tell me the best way to get my engine turning. are there any tips or products I could use as my truck has been lying unused since the 80's and I fear it may be seized. Thanks Quote Link to comment https://www.bigmacktrucks.com/topic/31145-seized-engine/ Share on other sites More sharing options...
jakebrake86 Posted May 12, 2013 Share Posted May 12, 2013 I've never had to do it myself, but I've heard of people mixing diesel fuel and motor oil 50/50 and pouing it into either the spark plug or injector ports and letting it drip for a day or two. Quote Jake Link to comment https://www.bigmacktrucks.com/topic/31145-seized-engine/#findComment-182920 Share on other sites More sharing options...
slpwlker Posted May 12, 2013 Share Posted May 12, 2013 Fill the injector or plug holes with Marvel Mystery oil. Crank case to. Fill it till it can't take anymore and let it sit a day,week,month. Or till the waiting gets to you. Drain and try asap Quote Link to comment https://www.bigmacktrucks.com/topic/31145-seized-engine/#findComment-182940 Share on other sites More sharing options...
j hancock Posted May 12, 2013 Share Posted May 12, 2013 With a big socket and bar, you can try to turn the crank balancer bolt (clockwise) after you have the engine soaking for a couple of weeks.Also, could have it in gear and try gently pulling the truck with another to see if there is any movement.Hopefully, no critters have moved into the engine through an open valve and set up housekeeping. Quote JimIt doesn't cost anything to pay attention. Link to comment https://www.bigmacktrucks.com/topic/31145-seized-engine/#findComment-182943 Share on other sites More sharing options...
Maddog13407 Posted May 12, 2013 Share Posted May 12, 2013 yup, we bought an old B61 once and it would turn over but not all the way, then we finally pulled the heads, found a mouse nest on top of #5 piston that they got in thru a hole in the exhaust pipe and an open valve. they engine would not go over far enough to push the nest out haha. i have hear of the old folks using Coca Cola to unseize an old motor before to. never tried it. if its a diesel it may not be seized. usually they are too oily to seize up, not sayin it cant happen Quote Link to comment https://www.bigmacktrucks.com/topic/31145-seized-engine/#findComment-182945 Share on other sites More sharing options...
umodelnut Posted May 12, 2013 Share Posted May 12, 2013 With gas motors we have put diesel or kerosene down in the crank and let it set and it seems to help. Don't know if it'd work with a diesel. I'd think it would. Quote Link to comment https://www.bigmacktrucks.com/topic/31145-seized-engine/#findComment-182947 Share on other sites More sharing options...
JTFormula Posted May 12, 2013 Share Posted May 12, 2013 I agree with everyone. Fill the cylinders with diesel fuel and let it sit for a couple weeks. Then drain it out and put a little ATF in the cyls and try to crank it by hand or tug it in gear to break it free. Don't go nuts. You want it to break free without too much force or you can do some damage. The diesel fuel will breakdown and loosen up the rust in there. The ATF will lube the cyl as well as having cleaning properties. Good luck. Quote ~ JT Burkard ~ AKA Sweaty Mack www.jonathanthomasmotorcars.com Link to comment https://www.bigmacktrucks.com/topic/31145-seized-engine/#findComment-182961 Share on other sites More sharing options...
theakerstwo Posted May 12, 2013 Share Posted May 12, 2013 Again don't try to pull the truck and damage it. That would be a good way to bend a rod.A good way to turn it after soaking it with a oil or something is jake one wheel up and put trans in highest gear and bump the wheel back and forth and it is a lot more affective than a wrench on the front nut. it needs moved back and forth and the nut will back off on the front of the crank if you try backing the engine I have taken the intake manifold off before and spray PB in the open valves and then blow air in to get it on the side of the cyl.The exhast can be taken off also. If you think that's too much trouble then think about hat you will do if you end up bending a rod or busting a piston. Quote glenn akers Link to comment https://www.bigmacktrucks.com/topic/31145-seized-engine/#findComment-182968 Share on other sites More sharing options...
MHfred Posted May 12, 2013 Share Posted May 12, 2013 Be very careful about trying to crank or pull starting after putting a liquid in the cylinders. Liquids do NOT compress and something will break if much is in the cylinder. You probably know that but a reminder since no one mentioned it. Quote Link to comment https://www.bigmacktrucks.com/topic/31145-seized-engine/#findComment-182992 Share on other sites More sharing options...
stephenellis Posted May 12, 2013 Author Share Posted May 12, 2013 thanks guys. not sure if it is seized or not but all the advice is much appreciated. hope not to find mice but here in Scotland there is likely to be an infestation of haggis. My hopes are high for the motor as all the hubs were free after years of lying still. Quote Link to comment https://www.bigmacktrucks.com/topic/31145-seized-engine/#findComment-182993 Share on other sites More sharing options...
slpwlker Posted May 12, 2013 Share Posted May 12, 2013 Make sure if you fill the cylinders with oil or something leave the plugs,Injectors out. so it can rid the cylinders of liquid as you spin it over. Quote Link to comment https://www.bigmacktrucks.com/topic/31145-seized-engine/#findComment-182994 Share on other sites More sharing options...
e9500v8 Posted May 12, 2013 Share Posted May 12, 2013 Have a block of wood ready to put over intake in case the rack is froze in the pump! Quote Link to comment https://www.bigmacktrucks.com/topic/31145-seized-engine/#findComment-182996 Share on other sites More sharing options...
stephenellis Posted May 12, 2013 Author Share Posted May 12, 2013 explain please Quote Link to comment https://www.bigmacktrucks.com/topic/31145-seized-engine/#findComment-182998 Share on other sites More sharing options...
2stacksuperdog Posted May 12, 2013 Share Posted May 12, 2013 I think hes saying if the rack is frozen in the pump and if you try to start it the motor will run away and you need something to shut the air off to the motor Quote Matt Link to comment https://www.bigmacktrucks.com/topic/31145-seized-engine/#findComment-183031 Share on other sites More sharing options...
stephenellis Posted May 13, 2013 Author Share Posted May 13, 2013 got it. seen a diesel running on it's own oil before and it was a scary sight. I am the eternal optimist and hope that the engine will turn with a little tlc. just hope that the neighbours are ready for the noise and smoke. Quote Link to comment https://www.bigmacktrucks.com/topic/31145-seized-engine/#findComment-183101 Share on other sites More sharing options...
shanes Posted May 13, 2013 Share Posted May 13, 2013 got it. seen a diesel running on it's own oil before and it was a scary sight. I am the eternal optimist and hope that the engine will turn with a little tlc. just hope that the neighbours are ready for the noise and smoke.I start mine every couple of months... I usually wait until Sunday morning when the neighbours are at Church... the prevailing wind normally fills their yard with smoke... Quote Link to comment https://www.bigmacktrucks.com/topic/31145-seized-engine/#findComment-183103 Share on other sites More sharing options...
stephenellis Posted May 13, 2013 Author Share Posted May 13, 2013 I like the way you think ! you are giving me ideas. Maybe I should wait til they have a garden full of laundry. hopefully getting the truck home this week so I will know how bad the motor is. One more question? my dad says that the truck was painted with lead based paint? is he talking bull? Quote Link to comment https://www.bigmacktrucks.com/topic/31145-seized-engine/#findComment-183104 Share on other sites More sharing options...
JTFormula Posted May 13, 2013 Share Posted May 13, 2013 If memory serves me right, lead paint was phased out in the mid 70's in the US. Most cars were enamel and lacquer paints at the time. Being a 1949 most likely you have some type of paint containing lead. Just don't eat the chips and you will be fine. Quote ~ JT Burkard ~ AKA Sweaty Mack www.jonathanthomasmotorcars.com Link to comment https://www.bigmacktrucks.com/topic/31145-seized-engine/#findComment-183127 Share on other sites More sharing options...
Mike Posted May 13, 2013 Share Posted May 13, 2013 I start mine every couple of months... I usually wait until Sunday morning when the neighbours are at Church... the prevailing wind normally fills their yard with smoke... It is an excellent bug spray. So no one should be offended by keeping the mosquitos down.mike 1 Quote Link to comment https://www.bigmacktrucks.com/topic/31145-seized-engine/#findComment-183131 Share on other sites More sharing options...
fxfymn Posted May 13, 2013 Share Posted May 13, 2013 I saw a test of "rust busters" recently (cannot remember where) that compared the various rust penetrants against each other. The clear winner was a home made mix of transmission fluid and acetone or lacquer thinner. Anywhere from 50/50 all the way to 90% solvent and 10% oil worked best.If all else fails you might try this in the cylinders. Quote Money, sex, and fire; everybody thinks everyone else is getting more than they are! Link to comment https://www.bigmacktrucks.com/topic/31145-seized-engine/#findComment-183133 Share on other sites More sharing options...
stephenellis Posted May 13, 2013 Author Share Posted May 13, 2013 bug spray and smoke screen? god bless diesels. I've got plenty thinners and a big tub of old engine oil. are there any other problems with macks that have been sitting for years? brakes are free and prop turns. Quote Link to comment https://www.bigmacktrucks.com/topic/31145-seized-engine/#findComment-183138 Share on other sites More sharing options...
41chevy Posted May 13, 2013 Share Posted May 13, 2013 I like the way you think ! you are giving me ideas. Maybe I should wait til they have a garden full of laundry. hopefully getting the truck home this week so I will know how bad the motor is. One more question? my dad says that the truck was painted with lead based paint? is he talking bull?The military colors would defiantly contain lead. Our military and NATO used up their supplies into the mid 70's.Haggis in the engine? better in my belly! Paul Quote "OPERTUNITY IS MISSED BY MOST PEOPLE BECAUSE IT IS DRESSED IN OVERALLS AND LOOKS LIKE WORK" Thomas Edison “Life’s journey is not to arrive at the grave safely, in a well preserved body, but rather to skid in sideways, totally worn out, shouting ‘Holy shit, what a ride!’” P.T.CHESHIRE Link to comment https://www.bigmacktrucks.com/topic/31145-seized-engine/#findComment-183146 Share on other sites More sharing options...
j hancock Posted May 13, 2013 Share Posted May 13, 2013 I saw a test of "rust busters" recently (cannot remember where) that compared the various rust penetrants against each other. The clear winner was a home made mix of transmission fluid and acetone or lacquer thinner. Anywhere from 50/50 all the way to 90% solvent and 10% oil worked best.I have heard the same thing about ATF and acetone. Supposed to be even better than Kroil and less money. Quote JimIt doesn't cost anything to pay attention. Link to comment https://www.bigmacktrucks.com/topic/31145-seized-engine/#findComment-183147 Share on other sites More sharing options...
h67st Posted May 13, 2013 Share Posted May 13, 2013 I can't say enough good things about PB Blaster. I've sprayed it on bolts that were absolutely destroyed with rust, let it soak a while, maybe tap on it with a hammer and spray some more on it and whammo! Off it comes. It would probably do a nice job of loosening valves and pistons and such. Quote Link to comment https://www.bigmacktrucks.com/topic/31145-seized-engine/#findComment-183148 Share on other sites More sharing options...
stephenellis Posted May 13, 2013 Author Share Posted May 13, 2013 pb blaster? is that a trade name? Think I might go for the diesel and oil and thinners and patience. The first three I have lots of but the last not so much. Quote Link to comment https://www.bigmacktrucks.com/topic/31145-seized-engine/#findComment-183170 Share on other sites More sharing options...
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