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-   -   Valve adjustment crank pulley access - 617 (http://www.peachparts.com/shopforum/diesel-discussion/413866-valve-adjustment-crank-pulley-access-617-a.html)

JHZR2 10-01-2021 09:56 AM

Valve adjustment crank pulley access - 617
 
It’s probably been 10 years since I’ve adjusted valves on a 617, and 3-4 at least on a 616.

I want to adjust the valves on my 300CD. I’m just not remembering how to get access to the crank pulley bolt (not interested in using PS pulley) on the car. Did I do it from underneath? Did I remove the fan and shroud? Just the shroud?

Honestly I don’t remember. I certainly don’t remember removing the fan.

For those who turn over at the crank by hand on a 617, what do you remove for access?

Thanks!

engatwork 10-01-2021 10:07 AM

27mm deep socket and 1/2" breaker bar from underneath.

JHZR2 10-01-2021 10:10 AM

From under. Ok that makes more sense. I didn’t remember climbing under either… but I guess that’s just time…

Thanks!

tangofox007 10-01-2021 11:24 AM

Quote:

Originally Posted by engatwork (Post 4193280)
27mm deep socket and 1/2" breaker bar from underneath.

And put your car keys in your tool box where the socket normally resides; leave then there until the socket is returned.

Also, a ratchet wrench instead of a breaker bar will make life easier.

OM617YOTA 10-01-2021 11:33 AM

Why not use the PS pulley? It's right there, and does no damage if you're not a gorilla about it.

Shern 10-01-2021 11:38 AM

Quote:

Originally Posted by OM617YOTA (Post 4193296)
Why not use the PS pulley? It's right there, and does no damage if you're not a gorilla about it.

The belt often slips... also, haven't figured out how not to be a gorilla in this case.

+2 for deep socket and extension from underneath. if you're careful, you can weave the tool combo up through the shroud and between the fan blades without having to remove anything.

It's a little annoying climbing down there each time, but it's a smoother way to turn the engine -especially in smaller increments when necessary(like IP timing).

JHZR2 10-01-2021 11:58 AM

Works out fine from under.

VC coming off and on is another story. Broke my vc. New thread on that.

Sugar Bear 10-01-2021 12:18 PM

I usually managed to damage one or two injector return hoses while R&R 'ing the valve cover. Consider replacing them at the same time unless they are fresh.

When adjusting the clearance, rotate the valve to find the spot with the least clearance and adjust the clearance at that position. This prevents the adjustment from being too tight in the other positions of rotation. Slightly loose/extra clearance is better than tight.

Good luck!!!

gwizzer 10-01-2021 08:37 PM

Access to crank pulley bolt OM617
 
I pull the two clips on the fan shroud and introduce a long handled ratchet, short extension,27mm deep socket between the radiator and the shroud. I protect the radiator with a kneeling cushion which also wedges the ratchet against the crank bolt.
This setup from above allows easy access to the ratchet and precise movements of the crank with a view of the timing marks and the valve adjustments.
Save your knees.

JHZR2 10-01-2021 08:46 PM

Quote:

Originally Posted by gwizzer (Post 4193367)
I pull the two clips on the fan shroud and introduce a long handled ratchet, short extension,27mm deep socket between the radiator and the shroud. I protect the radiator with a kneeling cushion which also wedges the ratchet against the crank bolt.
This setup from above allows easy access to the ratchet and precise movements of the crank with a view of the timing marks and the valve adjustments.
Save your knees.

I think that must have been what I did on my 617 cars before. I remember cranking from the top with a breaker bar.

My 240D the shroud is different, and I don’t think can be taken out without removing hoses. The 300cd shroud is different. I suspect it would have come out different. I’m pretty sure that must be what I did….

Thanks!!

jhermit 10-02-2021 09:25 AM

I use the starter by shorting the two screws. Very short bursts usually does the trick.

vstech 10-02-2021 11:45 AM

Quote:

Originally Posted by jhermit (Post 4193420)
I use the starter by shorting the two screws. Very short bursts usually does the trick.

As do I.

Getting the valves to exactly the right spot isn’t critical. As long as it is on the base circle.


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