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E7 300 Valve Lash Help
Posted 15 November 2010 - 07:07 PM
Posted 15 November 2010 - 10:38 PM
The intake and exhaust valves on the same cylinder are adjusted at the same time. When VS pointer and mark 1-6 on the dampner is lined up and number one cylinder is due for adjustment (pushrods will be lower in their bores than the pushrods in number 6) you will adjust both valves on cylinder number 1. A dynatard will have a solenoid in the rocker shaft towards the center pair of rocker arms. The electrical connections should come from the right side of the engine just above the exhaust manifold. The lash adjusters on the Dynatard exhaust rockers have a larger jam nut than the non-Dynatard rockers.
Hey, first post. My names rob. I've been an auto mechanic for a few years now but don't have too much experience workin on diesels, let alone bigger trucks. I've run into an issue setting valve lash on a 92 mack cab over with the e7300. I don't have alot of know how on mechanic lash adjusters and how to set them properly. The vibration dampener has timing marks as well as cylinder markings on it. I've been turning the motor til it ligns up with the marks, then setting the intake valve for that cylinder, then moving it to the next one and setting that and so on and so forth in firing order sequence. But it seems like on the next go around for the exhaust valves sometimes their too tight, sometimes they open up quite a bit. I'm just not sure what i'm doing wrong. If anyone could walk me through setting valve lash i'd be much appreciative. Also, how can you tell if a motor has dynatard. I don't see a sylenoid attached to the rocker arm rail, or anything else for that matter. Thanks in advance
Posted 15 November 2010 - 10:57 PM
Posted 15 November 2010 - 11:00 PM
Should just be locking the rocker shaft to the front mounting bracket.
That's what i thought. No dynatard on this motor. Another thing though. What does the bolt in the center of the number 1 rocker arm mount do. The one that pins the shaft. Does that affect valve lash. and how do you adjust that if it does. Thank you for the help so far.
Posted 26 November 2010 - 11:19 AM
Posted 26 November 2010 - 12:13 PM
Posted 26 November 2010 - 12:27 PM
What kind of noise/knock are you hearing? Is the knock the reason you started adjusting the valves to begin with?
Posted 26 November 2010 - 01:01 PM
could part of the problem be air still in one or more of the fuel lines?
Posted 29 November 2010 - 06:10 AM
Posted 06 December 2010 - 12:38 PM
Thanks for all the input!
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