by dana » Mon Feb 26, 2018 12:43 pm
I actually did something with this car this weekend. The motor has been using oil badly at idle and after decel since last winter when I beat it hard over the mountain in a ridiculous blizzard. I did not think it was the turbo. The engine ran great, had perfect compression and always started, so I was a bit confused. It did not use any oil when actually driving down the road, but would load up when sitting.
I mothballed it and drove it every couple weeks to keep things lubed up.
Pulled the motor saturday and tore it down. Nothing obviously bad, but several of the valve seals were dumping oil past valves. Turbo is dry and tight. The valve seals surely look like the source of the oil. I'm not sure why, but I did mess around with this head a lot with grinding valve faces, self porting ETC. The valve guides had similar wear to what they did the last time I checked it, so I dont know what changed.
I pulled the pistons, and everything looks great in the bottom end. Ring gaps were perfect. The oil control rings were pretty much plugged with soot, I assume this is from its veggie days.
The plan is to clean up the rings, replace rod bearings, and put a good, unmolested, low mile head on it.
I still need to measure the bores, but they looks really good to the naked eye.
current:
-mk4 tdi wagon with some mods
-TDI b3 90q, holset turbo, be strong little connecting rods!
-the turbo tractor
past:
-11 second 90q junker
-20vt swapped 90q winter beater
-efi 10vt 4kq
-way too many other long gone urs's, 200's 4000's, b5's