Is a valve lash adjustment needed?
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Senior User
Joined: Mar 2002
Posts: 137
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From: Ponca City, OK
Is a valve lash adjustment needed?
I have a 2001 F250 with the 7.3 which seems to have a "ticking" noise. A friend said I needed to have the top end valve lash ran. That this was something the Dodge Cummins engines required all the time. But in research on this site I could not find anything on this subject.
Do these engines require their valve lash adjusted? If so, anyone have the steps/clearances required?
Do these engines require their valve lash adjusted? If so, anyone have the steps/clearances required?
Postmaster
Joined: Jan 2009
Posts: 2,544
Likes: 4
From: Suffolk, VA
Well almost everything uses hydraulic lifters, but the rockers are pedestal mount. Meaning there's no adjustment in them compared to a stud mount rocker arm. Only way to adjust is to place a shim under the pedestal, or machine the pedestal. But you won't be doing that on a stock engine. I have read here where people have found a few slightly loose and retorqued the bolts. And while they're there they do the 50 cent mod and retorque the injector bolts too. One day I need to pull the valve covers off and do the same. I have no idea if the PO did the UVCH fix or not.
Post Fiend
Joined: Mar 2007
Posts: 26,966
Likes: 50
From: Texas
Loose injectors, type of oil, type or amount of fuel additive, regular diesel vs. biodiesel will change the way your engine sounds. As mentioned, there's no lash adjustment on these motors. Re-torquing things will quite down the motor and is worth the time and effort.
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Senior User
Joined: Mar 2002
Posts: 137
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From: Ponca City, OK
Thanks for the great info. I will check the torque settings this weekend.
I assume you have to roll the motor to ensure both valves are free before torqueing them? Or can they all be torqued at once?
Also, should the engine be warm or cold first?
I assume you have to roll the motor to ensure both valves are free before torqueing them? Or can they all be torqued at once?
Also, should the engine be warm or cold first?
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Post Fiend
Joined: Nov 2007
Posts: 9,549
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From: Payson, AZ
Be sure you check the UVCH connectors while you have the VC's off.
Some info links
Diesel Technicians Article
Instead of the Ford retainer clips for 14 bucks you can do the Quarter Mod
And here's a video as well:
Quarter Mod Video
Some info links
Diesel Technicians Article
Instead of the Ford retainer clips for 14 bucks you can do the Quarter Mod
And here's a video as well:
Quarter Mod Video
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