valve shimming?
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Lead Driver
Joined: Sep 2010
Posts: 7,793
Likes: 50
valve shimming?
Alright guys, was tooling with my quad and it hit me about doing this to our trucks. Does are valves have a bucket style where they need shimming(using stock springs)? I'll be "in there" early next month doing injector orings/coil shimming and thought, might as well check valve clearance.
Hotshot
Joined: Nov 2006
Posts: 11,286
Likes: 263
From: North of Greenville
Geeesh!! 
You KNOW that I'm doing the same planned work later this month... why... WHY do you have to ask these kinds of questions that might end up coercing me to do even MORE work and spend MORE money while I'm "in there"?
Seriously, though. Good question, even though I may not want to see the answers!
You KNOW that I'm doing the same planned work later this month... why... WHY do you have to ask these kinds of questions that might end up coercing me to do even MORE work and spend MORE money while I'm "in there"?
Seriously, though. Good question, even though I may not want to see the answers!
Lead Driver
Joined: Sep 2005
Posts: 9,399
Likes: 188
From: Norco,CA
I agree with Dan. If you want more seat pressure you could add a shim. But check the clearance between the coils when the valve is open. This would in fact add pressure open and closed. If I were to do this, I'd change the springs instead.
Hotshot
Joined: Nov 2006
Posts: 11,286
Likes: 263
From: North of Greenville
I take all of these inputs to equal "No. Don't waste any time on this issue." At least for me, I'm happy with that. I've got enough to do already without adding to my "Do to truck" list.
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Lead Driver
Joined: Jun 2013
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From: north of Minneapolis, MN
But the tappets, or lifters, in your quad are not hydraulic...they are solid...correct? In your quad my guess is they have a valve clearance spec. It is apples and oranges.
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Veteran/Sheepdog
Joined: Feb 2012
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From: Western AR
When I went with the stronger 910 valve springs on mine, they came with a couple different shims. You chose which ones you wanted to install with the springs. When I pulled the stock ones out, I could compress them with my bare hand. I could not come close to compressing the 910s with my hand. Truck runs great with the 910s and my higher HP mods.
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Lead Driver
Joined: Sep 2010
Posts: 7,793
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[QUOTE=F250_;16794687]Geeesh!!
You KNOW that I'm doing the same planned work later this month... why... WHY do you have to ask these kinds of questions that might end up coercing me to do even MORE work and spend MORE money while I'm "in there"?
f250, ..e can't run out of ideas, or else the misses will have is doing things against our wils😉
You KNOW that I'm doing the same planned work later this month... why... WHY do you have to ask these kinds of questions that might end up coercing me to do even MORE work and spend MORE money while I'm "in there"?
f250, ..e can't run out of ideas, or else the misses will have is doing things against our wils😉
Fleet Mechanic
Joined: Nov 2009
Posts: 1,381
Likes: 193
From: Cambs, England
There are 2 types of shim that are associated with the valve train, valve spring shims can be used to get the correct installed height & therefore correct seat pressure, normally used with high performance valve springs.
Overhead camshaft engines sometimes use buckets with shims to set the valve lash.
Our trucks come with neither, but the former could be used if you're building something really hot.
HTH & happy Christmas to you all.
Overhead camshaft engines sometimes use buckets with shims to set the valve lash.
Our trucks come with neither, but the former could be used if you're building something really hot.
HTH & happy Christmas to you all.