Caption Contest ~ OM642 Intake
Thread Starter
Junior Member
Joined: Nov 2019
Posts: 25
Likes: 3
e320
The bottom pipe is egr. It's not so bad. The top 2 pipes are intake manifolds. I've never seen anything like that. The carbon is from the pcv, which pipes into the TB, and then here. I think either the pcv valve failed or there is excessive blow by (or both).
Does anyone else other ideas?
I am pulling the engine this weekend to evaluate heads and lower. At minimum the heads and intakes need industrial strength cleaning. I'll be lucky and happy if I can just have that done, heads rebuilt, replace pcv, and var. seals.
Does anyone else other ideas?
I am pulling the engine this weekend to evaluate heads and lower. At minimum the heads and intakes need industrial strength cleaning. I'll be lucky and happy if I can just have that done, heads rebuilt, replace pcv, and var. seals.
Member
Joined: Dec 2019
Posts: 187
Likes: 45
2008 R320 CDI 4MATIC
Also consider installing a "catch can" / oil separator. Such as a Provent 200 manufactured by Mann-Hummel.
Review;
https://oe-products.mann-hummel.com/...ProVent_en.pdf
Regards
Joseph
Review;
https://oe-products.mann-hummel.com/...ProVent_en.pdf
Regards
Joseph
Thread Starter
Junior Member
Joined: Nov 2019
Posts: 25
Likes: 3
e320
I am very grateful for the tip, Joseph. I will be adding a catch can and checking intakes with a boroscope regularly. I think the real problem here was blow by on piston 1 due to ring failure. I am in process of replacing that piston and the rings on piston 3. Everything else down there looks and checks like new. I just picked up the heads and intakes from the machine shop after a good cleaning, checkup, and valve seal replacement. Keeping fingers crossed that I am not missing anything else and that I can get the puzzle back together. Good fun ...
Member
Joined: Dec 2019
Posts: 187
Likes: 45
2008 R320 CDI 4MATIC
I am very grateful for the tip, Joseph. I will be adding a catch can and checking intakes with a boroscope regularly. I think the real problem here was blow by on piston 1 due to ring failure. I am in process of replacing that piston and the rings on piston 3. Everything else down there looks and checks like new. I just picked up the heads and intakes from the machine shop after a good cleaning, checkup, and valve seal replacement. Keeping fingers crossed that I am not missing anything else and that I can get the puzzle back together. Good fun ...
You should get good ideas on how to install a system.
Joseph~
Last edited by Joseph~; Jan 19, 2020 at 11:04 AM.
