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: 2,081 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: 1,174 Joined: 31-January 23 From: Granbury Texas Member No.: 27,135 Region Association: Southwest Region |
(IMG:style_emoticons/default/popcorn[1].gif) (IMG:style_emoticons/default/popcorn[1].gif)
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. |
JeffBowlsby |
Mar 30 2024, 11:51 AM
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#3
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914 Wiring Harnesses Group: Members Posts: 8,486 Joined: 7-January 03 From: San Ramon CA Member No.: 104 Region Association: None |
Manual says 5KMI intervals.
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emerygt350 |
Mar 30 2024, 12:59 PM
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#4
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Advanced Member Group: Members Posts: 2,081 Joined: 20-July 21 From: Upstate, NY Member No.: 25,740 Region Association: North East States |
Yeah, I wanted to be careful and I figured new valves and the new sleaves and spacer and all there might be a little settling after the engine build.
My temps were up there in the nervous zone once in a while till I got the lean cruise stuff figured out. |
cgnj |
Mar 30 2024, 01:23 PM
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#5
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Senior Member Group: Members Posts: 623 Joined: 6-March 03 From: Medford, NJ Member No.: 403 Region Association: None |
My experience with CrMo pushrods and swivel feet. set @ zero lash. I run headers so the job was much easier.
They were always on. I check once/year. |
r_towle |
Mar 30 2024, 01:57 PM
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#6
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Custom Member Group: Members Posts: 24,571 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States |
Annually
But, I never did go more than 5k annually. |
emerygt350 |
Mar 30 2024, 02:28 PM
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#7
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Advanced Member Group: Members Posts: 2,081 Joined: 20-July 21 From: Upstate, NY Member No.: 25,740 Region Association: North East States |
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r_towle |
Mar 30 2024, 02:46 PM
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#8
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Custom Member Group: Members Posts: 24,571 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States |
I seem to find one…but I like them just a hair loose…
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brant |
Mar 30 2024, 03:47 PM
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#9
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914 Wizard Group: Members Posts: 11,618 Joined: 30-December 02 From: Colorado Member No.: 47 Region Association: Rocky Mountains |
My street car around 3-4k
My race car every 2 hours of run time |
emerygt350 |
Mar 30 2024, 06:20 PM
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#10
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Advanced Member Group: Members Posts: 2,081 Joined: 20-July 21 From: Upstate, NY Member No.: 25,740 Region Association: North East States |
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bkrantz |
Mar 30 2024, 07:33 PM
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#11
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914 Guru Group: Members Posts: 7,742 Joined: 3-August 19 From: SW Colorado Member No.: 23,343 Region Association: Rocky Mountains |
Back when I DD'ed a 914, I changed the oil and adjusted the valves every 5000 miles.
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emerygt350 |
Mar 31 2024, 05:08 AM
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#12
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Advanced Member Group: Members Posts: 2,081 Joined: 20-July 21 From: Upstate, NY Member No.: 25,740 Region Association: North East States |
And how often did they require adjusting? That is my question, how often after checking them did you actually find one needing adjustment on a DD?
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brant |
Mar 31 2024, 06:38 AM
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#13
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914 Wizard Group: Members Posts: 11,618 Joined: 30-December 02 From: Colorado Member No.: 47 Region Association: Rocky Mountains |
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VaccaRabite |
Mar 31 2024, 06:55 AM
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#14
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En Garde! Group: Admin Posts: 13,432 Joined: 15-December 03 From: Dallastown, PA Member No.: 1,435 Region Association: MidAtlantic Region |
I do mine annually.
I feel like I barely drove it last year, and did my spring service in June. So I'll do valves and an oil change in June. Generally speaking, like rich I'll usually find one that is a smidge tighter. and that's probably because I tightened the valve a little bit more when I set the lock nut the adjustment before. For the most part they don't move. But when they start moving, you WANT to know. Zach |
Root_Werks |
Mar 31 2024, 11:57 AM
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#15
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Village Idiot Group: Members Posts: 8,312 Joined: 25-May 04 From: About 5NM from Canada Member No.: 2,105 Region Association: Pacific Northwest |
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930cabman |
Mar 31 2024, 04:39 PM
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#16
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Advanced Member Group: Members Posts: 3,007 Joined: 12-November 20 From: Buffalo Member No.: 24,877 Region Association: North East States |
All good information, does a consensus do this adjustment on the bench? or in the car?
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emerygt350 |
Mar 31 2024, 04:51 PM
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#17
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Advanced Member Group: Members Posts: 2,081 Joined: 20-July 21 From: Upstate, NY Member No.: 25,740 Region Association: North East States |
After spending an hour on the pavement yesterday, I would wish the bench was an option. I wonder about lowering the front of the engine, is that possible?
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VaccaRabite |
Apr 1 2024, 07:31 AM
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#18
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En Garde! Group: Admin Posts: 13,432 Joined: 15-December 03 From: Dallastown, PA Member No.: 1,435 Region Association: MidAtlantic Region |
All good information, does a consensus do this adjustment on the bench? or in the car? Under the car. Why on earth would you pull the engine to do a valve adjustment. You also do not have to pull the heat exchangers. Some of the valves are tricky, but you can get to all of them once you figure out the tricks. What I DO like to pull are the spark plugs, so you are not trying to turn the engine against compression. And put the car in the air with one wheel on a ramp and the other dangling (car supported with jackstands - be SMART!), with the car in 5th gear. From under the car you turn the free wheel with your foot while watching your valves. Easy! Zach |
friethmiller |
Apr 1 2024, 09:00 AM
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#19
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Member Group: Members Posts: 464 Joined: 10-February 19 From: Austin, TX Member No.: 22,863 Region Association: Southwest Region |
I do mine twice a year. Once in the spring and again in the fall - right before my Tangerine Racing heater box goes on for the cooler weather.
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mxkinn01 |
Apr 1 2024, 09:57 AM
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#20
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Member Group: Members Posts: 226 Joined: 18-June 17 From: Las Vegas, NV Member No.: 21,195 Region Association: Southwest Region |
After 10,000 miles of the rebuild of my tiny 1.7 I've checked three times, all three times all were dead on (just lucky I guess). On the other hand my type 1 beetle almost always needs adjustments every time I check.
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