While installing the SEGR last weekend, I noticed again (and had previously noticed) what looked like melted black plastic spattered over the top of the engine. I puzzled over where it might have come from. However, I have been chasing an exhaust smell in the cabin when stopped at lights with the HVAC turned on, and when I read a similar issue here that was traced to leaking injector seals, I took a second look. What I found was the #4 injector surrounded by this black plastic looking "stuff" which I originally thought was just drool from the CCV puck. After I scraped on it with a long flat blade screwdriver, I found out it was mostly soot mixed with a little bit of oil.
Yep.....#4 seals are shot.

Of course, it has to be the furthest one to the back with the least access.... but anyway, I picked up new o-rings and seals from my local dealer and started on it last night. I spent a good 2 hours+ excavating the injector clamp so I could remove it and then further excavating around the injector, slowly scraping away the petrified, solidfied remains of soot and oil (coal, basically). I let the rest of it soak in a bit of Liquid Wrench overnight, but getting the injector out is not going to be easy.
I see what the factory removal tool looks like - does anyone have suggestions on a DIY method? There isn't much access back there, although I did remove the wire harness and fuel line from #3 which helps.
I'm guessing the seal has been leaking for at least 10 to 15k miles, so hopefully the injector and sealing surface in the head aren't eroded.
Is there anything on this vehicle that holds up? Sorry to rant, but thermostats, alternator pulleys, EGRs, FCVs, torque converters, ball joints, brakes, u-joints, rear diffs at 80k, glow plugs, fuel filter housings, motor mounts, injector seals, transmissions even.
Chris