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Any body know where I can find a good used head for a 1999 F800 with a 5.9 Cummins? Cast/head # is 3943627. My mechanic tells me it's the same head as on a dodge cummins but it's ported bigger...?
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what happend to yours??? could it be fixed? I have a buddie that might have one!
I found a couple possibilities. I am not having much luck with help on the cummins forum though and am hoping someone on here can answer a couple questions for me.
The cast number on my truck's head is 3943627. I found a replacement head off of a 99 dodge that has the same cast number on it but with a "-03" at the end of it. Anybody know what the "-03" is for?
The head also has "2.45" above the cast number and a paper sticker with 3945624 below it so not sure what the heck all these numbers mean.
Are these heads compatible? The price is $700.
I also found a rebuilt head guaranteed for 1 yr for $1800. Is it worth the risk to try the used head vs going with a rebuilt one? The used head came off of a block that was run out of oil but the head is supposed to be in good shape.
Thanks.
Thanks.
as i said earlier, all that matters is a 24v head, u could go from 98.5-02 they all used the same 24v head, there might have been upgrades to the valve seats and valve metal, but the porting and valve sizes r the same, regardles if the head came from an h.o or s.o. 24v engine, if u call a cummins distrib. give them your esn and the one from the donor u will find the correct part number......if u cant get your esn, look for a cpl#, ive been working on and own two cummins for years. my only reccomendation would be for u to deck the head and use a marine head gasket, its stout. thats a little pricey for a reman, i wouldn't hesitate on the other one, just have it decked and checked out.
http://truckpartsinventory.com/info.aspx?part=297751&p=3&val=c91_m7&o=30&d=d
put straight edged on it and use a feeler guage under the straight edge, I dont know what spec is for the head but if theres more then .020 gap u need to have the surface of the head machined flat and use the marine head gasket its thicker and more durable. If the engine is a keeper with low miles and in good shape, id send the head out either way. id also be looking into a new set of injectors since its all apart. What happened to the original head ? did it crack or warp? if so was crack near #6 cylinder cause theres a way of preventing it from happening again.
http://www.competitiondiesel.com/forums/showthread.php?t=40090
http://www.competitiondiesel.com/forums/showthread.php?t=51103&highlight=coolant+bypass
http://www.competitiondiesel.com/forums/showthread.php?t=33430
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