Valve adjustment, How frequently do you have to actually adjust them |
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Valve adjustment, How frequently do you have to actually adjust them |
emerygt350 |
Mar 30 2024, 10:12 AM
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#1
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Advanced Member Group: Members Posts: 2,144 Joined: 20-July 21 From: Upstate, NY Member No.: 25,740 Region Association: North East States |
Just curious on how frequently people find an out of spec valve clearance. I had some last time I checked on my original engine, but I just did my 4k mile check on my 2056 with brand new valves, spring, guides, etc and everything was right on. That's after a couple of autocross events and generally hard driving.
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technicalninja |
Mar 30 2024, 11:19 AM
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#2
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Senior Member Group: Members Posts: 1,326 Joined: 31-January 23 From: Granbury Texas Member No.: 27,135 Region Association: Southwest Region |
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I want to hear what others have to say... I've done a SHITLOAD of valve adjustments on water cooled stuff over the years. The change to 4 valve with much lighter parts and fully hardened valve train parts has almost eliminated the requirement for valve adjustment. Once I've adjusted a modern car the adjustment should last the life of the vehicle. A bunch of Toyotas, Hyundias, Kias come with SOB/SUB (shim over bucket/shim under bucket) and many go 300K plus without a single adjustment. A Honda V6 needs adjustment at 100K and those are old school with an adjuster and lock nut that is similar to the T4. I did my wife's Oddy at 120. Intakes did not require any adjustment, all of the exhaust were .003-4 tight. On a play toy like the 914 I'd probably say once a year. After the second removal of the valve covers with no adjustment required I'd lengthen my intervals. Jake said engine temperature above 400 leads to deformation issues but you're watching your temps so that shouldn't come into play. |
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