Quote:
Originally Posted by Maxbumpo
Question on Technique.
Reference: Doktor Bert's YouTube video of his 300SD:
https://www.youtube.com/watch?v=PFhaRefTRUM
In the comments section, posted by The10851Man:
"Wanted to share this with all of you regarding the correct way to adjust the 617 valves. When adjusting, rotate the valve spring retainer. As it rotates, you will notice the clearance will change. Adjust at the TIGHTEST point.
This is the #1 reason why 617's run like crap after most shops adjust the valves. Most techs just set the valves and when the valve rotates (as they do normally during operation) the clearances closes up. There is a certain amount of unavoidable runout in the valve train, even on brand new motors. By rotating the retainer (valve and retainer rotate together) you can find the "wide spot" and the "tight spot" in your valve clearance. "
Doktor Bert hasn't posted here in a bit.
Anyone care to comment on this? |
Keep in mind... if significant differences are found from rotating the valves the strong possibility of worn valve guides exist.
It certainly can solely be from tight clearance resulting in carbon... but the rotators are supposed to prevent it.