Hey guys,

I recently completed a head replacement (with a used no-crack #14 head) on my 87 300d as I mentioned in another thread. Everything seems to be working well! I have noticed that on a cold start (keep in mind cold engine not cold outside...about 40-50 degrees at night right now) it will misfire even after letting it go through a full glow cycle (about 20 seconds or so). If I rev it up to about 1k rpms for about 10 seconds and then let it back down to idle the miss and rough idle are gone.

Here is a list of what was done when replacing the head:

1) Replaced all rubber fuel lines, primary and secondary filter, braided return lines, and clear lines.
2) Replaced injectors with freshly rebuilt and pop-tested units
3) Replaced glow plugs with 6 brand new monark units and reamed out glow plug holes
4) Replaced the seal in the fuel pre-heater...no fuel leaks can be seen from the front of the engine (the PO replaced the delivery valve seals just before I bought the car a year ago)
5) Removed the injection pump, replaced all oil seals, and reinstalled to the 15 degree spec (used the tool to lock the pump when installing)...did not use a light to adjust timing since I don't want to buy one lol

When I had the head off I checked for timing chain stretch and wear by comparing the crankshaft and camshaft marks...not even a 1 degree difference so I left it alone. The car runs perfect after the initial 10 seconds...and any subsequent warm starts exhibit no issues.

So...am I just being paranoid? I have used the search feature and found that alot of people say not to worry about it...but I am kind of anal about how my car runs lol. By comparison, my 300sd with the om617 and 343,000 miles purrs with no miss at cold start-up.

I did notice that the clear primary filter looks about half full of air...could it be a flow issue from the tank strainer (I've never checked that)? The car runs perfectly otherwise, is not pressurizing coolant and has a ton of power (doesn't seem like it's starving for fuel).

Thanks for any advice!

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97 S500 (90,000 miles) - wife's car
87 300D (298,000 miles and a replacement #14 head)
94 Suburban K2500 - need something to haul firewood
83 300SD (343,000 miles) (sold)