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1968 Ford 5000 headgasket

2

2k1bmw330i

New User
Hi new to the forum here. i bought a ford 5000 diesel. previous owner put two head gaskets in it. question is is it is smoking white pretty heavy and it has a hard time starting up when its cooled down needs ether, when its warm its a long crank but it will start up. now ive been doing some research and noticed that 1968 is the cut off for thick and thin headgasket. as far as i could tell when i looked at serial number mine is made 01 of 1968 the guy put a headgasket from a 1975. he didn't know the year so he ordered for 1975 so that telling me it has a think head gasket in it when it should have a thin headgasket in it????? any thoughts would be helpful. have not done a compression test but I'm thinking its a little low causing unburned fuel and white smoke which maybe could be all caused by headgasket? has new rings in it also and head was sent out and tested
 
Having a thick gasket where a thin one should be will definitely cause hard starting. It's problematic to go by the date code of the engine because you don't know what's been done to the engine over the last 50 years. It's best to measure piston protrusion and then order the gasket you need.

Generally, engines needing a thick head gasket will have a piston protrusion of between .011 and .023" at TDC. If the pistons are roughly flush to slightly below the deck at TDC, then they will need the thin gasket.

Finally, if ordering the thin gasket, make sure you determine whether you need a 4.2" or 4.4" bore - they can be had either way.
 
awesome thanks for clarifying all of this. I
guess I will be tearing it down and
measuring piston to deck clearance and than
ordering a gasket!
 
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