I looking for any cracked 603 heads a especially #14. If anyone has one email me. I'm located in Central Florida.

I know of an SDL that had an overheating issue and is awaiting a new engine.. its in Central FL(orlando) at my mechanics shop... send me a PM regarding what you want the head for and Ill see if we can get you one

Need something to experiment on, I want to try different repair techniques tig, stick, spray welding. But ecessively warped heads are useless.

ok then.. that one is in the bucket... where in CF are you?

Explain welding the crack please. Id imagine youd only just cover up the crack, and have crack deep in the metal still

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1981 300SD 512k OM603

Orange County FL, Experiment = Try multiple different repairing techniques, first is finding aluminum thickness at cracks on #5 cyl.

I'm going to have a cracked #14 soon as I put my fresh #17 on. It also has a blown out prechamber lockring hole, so there's a lot for you to work on.




You can have it for shipping if you want. Probably be a few weeks before I get around to changing it out, though.

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1998 E300 +310,000K
1996 E300 +460,000K

I can not speak for BOGs' project but have a little experience with ARC welding. As you said if you weld over a crack if it is deep enough the crack is still there under the weld and in time it may crack again. Usually you would grind a channel through the crack until you hit the uncracked metal then carefully start welding and building up the material (the material your are welding and what you are using to fill in the weld are very imnportant as well as controling the heat during the welding process). Depending on the material that you are welding; you may need to preheat the item and maybe even use a stress relieveing heat process after you are done welding. The filler metal often needs to be colse to the same alloy as the origional metal or often a metal that is more flexable than the origional metal is used. As an example some cast irons are welded with rods having a nickle alloy.
The big problem is that cylinder heada like to crack between the intake and exhaust valve seat area. If the crack extends under the seat area it becomes extremely difficult to rapair with success and if it had valve seat inserts will need to be properly re-machined. Besides the head cracking again there is also the problem that the valve seat insert will become loose.

What is curious is that I have a Volvo diesel with an aluminum head and a certain size and location of craks is considered OK.

Wishing BOG good luck!!!

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84 300D, 82 Volvo 244Gl Diesel

Really warped heads can be straightened. Had a volvo 850 with a badly warped head from overheating and the machinist straightened it and decked it.

I did a search on sites on straightening warped cylinder heads and found thid sit on overhead cam cylinder head repair. They talk about welding the head and a method to straighten the head with out milling it (or before milling).

http://www.aa1car.com/library/2003/us110324.htm

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84 300D, 82 Volvo 244Gl Diesel

Lux: Sounds cool to me, probably cut apart after welding to check penetration on your head.
Anyone else have one?

I got one.....Hayward,CA.

Dicey proposition at best. We used to weld up aluminum heads for SB cheyies and Z cars, but a diesel and its higher stresses and thin castings is not a recipe for victory.

Penetration is one thing, stress relief another, the changes in the surrounding casting from the heat causing a stress riser still another.

I hope that you can create a reliable fix, would make a nice business.

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Gone to the dark side

- Jeff

Only problem with that is we won't know if it's reliable until we give him the business first and drive them a few hundred thousand miles.

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~Michael S.~
Past cars:

1986 300SDL
1987 300SDL
1982 240D
1982 300SD


Current:

1987 300SDL