I'd remove the injector for the cylinder associated with the breached intake runner, and then crank it over with the starter. Need a new heat shield under the injector, or "reset" the old heat shield so that it seals again. Someone has posted how to to do that before, wish I'd bookmarked that thread.

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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

You can try this - Do I NEED new injector heat shields?

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Current Stable

• 380SL (diesel)
• Corvette C5
• Manx
• Baja Bug
• F350 Powerstroke
• Auburn Boattail Speedster replica

You're right, the injector for the cylinder associated with the breached intake runner (and breached coolant jacket) must come out. The injector hole is the only outlet since the glow plug remnant is still in the head.

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85 300D turbo pristine w 157k when purchased 167,870 July 2025
83 300 D turbo 297K runs great. SOLD!
83 240D 4 spd manual- parted out then junked