Hi, I just swapped out a cracked #14 head on my 1987 300 SDL with a 1991 350 #17 head. I have read the other threads on this topic, but could not find any information on whether or not you can use the #14 injectors and lock collars with the #17 head. The #14 injectors thread in to the collar and the #17 injectors thread into the prechamber. The reason I ask is that the car is running now, but there are a few major leaks (puffs of air) coming from the prechambers on two cylinders and I am unsure if this is a worn prechamber issue or if it is caused by trying to put #14 injectors on a #17 head. I am trying to avoid buying new injectors, but that might be the only answer. Any info would be much appreciated. ...also, even with the leaks, it's running, very cool!

#17 prechambers and #14 injectors are not compatible unless you also swap the #14 prechambers into the #17 head which is complicated.

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Thanks! New injectors it is.

Vertical/#14 prechambers aren't always a good fit in a later head casting. I did okay with gsxr's mod:





Sixto
MB-less

Just finished this journey, #17 head with inclined injection onto my '87 300TD.

Found a MB wrecking yard in SoCal that sold me a set of used inclined injectors. Sent them to Greazer for clean/balance, now my idle is so so so smooth, plenty of power, getting 26 - 27 mpg around town.

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Respectfully,
/s/
M. Dillon
'87 124.193 (300TD) "White Whale", ~392k miles, 3.5l IP fitted
'95 124.131 (E300) "Sapphire", 380k miles
'73 Balboa 20 "Sanctification"
Charleston SC

There is also a bit in the FSM about a special tool for resurfacing the prechamber faces in the head for a better seal.

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1995 E420 Schwarz
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#1995 E320 Touring
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