How often???, valve adjust. |
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How often???, valve adjust. |
meares |
Jun 9 2005, 01:05 PM
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#1
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Member Group: Members Posts: 403 Joined: 23-March 05 From: Atlanta Member No.: 3,800 |
how often do i need to adj. the valves? i just put a 2L in and adj. the valves,and drove it 60 miles.....should i re-adjust now and then start a 3K mile interval? ALSO......does the engine have to be cold (sitting overnight) to get the best reading?
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TROJANMAN |
Jun 9 2005, 01:07 PM
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#2
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Looks nice in pictures......... Group: Members Posts: 5,271 Joined: 5-March 04 From: Colorado Member No.: 1,753 Region Association: None |
i just had an engine rebuilt, and the mechanic told me to come in after a 500 mile break in period, for a valve adjustment. how often after that, i am not sure.
drive on (IMG:http://www.914world.com/bbs2/html/emoticons/driving.gif) |
type47 |
Jun 9 2005, 01:24 PM
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#3
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Viermeister Group: Members Posts: 4,254 Joined: 7-August 03 From: Vienna, VA Member No.: 994 Region Association: MidAtlantic Region |
if it's a new rebuild, i'd do it after 300-500 mi, then follow the factory schedule which is 6000 i think and adjusted with engine cold, that is, left overnight
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tat2dphreak |
Jun 9 2005, 01:27 PM
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#4
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stoya, stoya, stoya Group: Benefactors Posts: 8,797 Joined: 6-June 03 From: Wylie, TX Member No.: 792 Region Association: Southwest Region |
(IMG:http://www.914world.com/bbs2/html/emoticons/agree.gif) check at every oil change(3k) though... and if you notice one getting tight between adjstments, then adjust more often, and try and figure out why it's tightening.... |
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Joe Ricard |
Jun 9 2005, 01:31 PM
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#5
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CUMONIWANNARACEU Group: Members Posts: 6,811 Joined: 5-January 03 From: Gautier, MS Member No.: 92 |
Usually about the time the scares heal up. But I drive it pretty hard and run them tight. .004 and .006 Every other Ax event or if I start to hear them after warmed up.
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meares |
Jun 11 2005, 09:39 AM
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#6
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Member Group: Members Posts: 403 Joined: 23-March 05 From: Atlanta Member No.: 3,800 |
what do you hear? perhaps an exh. manifold leak or, (enter NO SHIT here,)valves tapping? how do you know if they are running tight or loose?
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Bleyseng |
Jun 11 2005, 10:14 AM
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#7
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Aircooled Baby! Group: Members Posts: 13,035 Joined: 27-December 02 From: Seattle, Washington (for now) Member No.: 24 Region Association: Pacific Northwest |
If you run them at .004 Int and .006 ex then with the engine hot you won't hear anything as its pretty quiet.
Most 914's running stock adjust make noise..... |
meares |
Jun 11 2005, 10:21 AM
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#8
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Member Group: Members Posts: 403 Joined: 23-March 05 From: Atlanta Member No.: 3,800 |
thanks, i was a little concerned about the noise!
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Cap'n Krusty |
Jun 11 2005, 11:06 AM
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#9
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Cap'n Krusty Group: Members Posts: 10,794 Joined: 24-June 04 From: Santa Maria, CA Member No.: 2,246 Region Association: Central California |
And most 914s running .004/.006" get burned valves ............ noise is good. You want a quiet valve train, get a Chevy .............. I adjust them after they've run for 30 minutes on the lift, then at 300 miles, then 1500, 3000, 6000, 9000 and so on .......... Worked good for 32 years, so I think I'll stick with it ........ 74s and up do 5K intervals, at least by the book, but I don't like to let 'em go that long. |
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Bleyseng |
Jun 11 2005, 11:46 AM
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#10
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Aircooled Baby! Group: Members Posts: 13,035 Joined: 27-December 02 From: Seattle, Washington (for now) Member No.: 24 Region Association: Pacific Northwest |
I ain't running stock........I set em to .004-.005 but I have SS valves and 911 adjusters and adjust them every 1000-2000k cuz I AX/track the car.
Note I said stock ones are noisy. (IMG:http://www.914world.com/bbs2/html/emoticons/wink.gif) IF you have STOCK valves, set em to factory settings. |
nebreitling |
Jun 11 2005, 11:58 AM
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#11
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Member Emeritus Group: Members Posts: 3,314 Joined: 26-March 03 From: San Francisco Member No.: 478 |
i heard a rumor (please feel free to validate or kill it here) that the factory actually originally specified 004/006, but that they became concerned about differences in 'feel', and thus erred on the side of caution. this explanation sounded a little elaborate to me at the time, but it still seems to me that a difference of 002 could come down to 'feel'. certainly with SS valves, i would think that you could adjust them until they just *start* to go quiet when the engine is hot. i defer to those w/ more experience, but i too am currently setting them to 004/005 and check them after every other event. |
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Aaron Cox |
Jun 11 2005, 12:04 PM
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#12
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Professional Lawn Dart Group: Retired Admin Posts: 24,541 Joined: 1-February 03 From: OC Member No.: 219 Region Association: Southern California |
(IMG:http://www.914world.com/bbs2/html/emoticons/hijacked.gif)
friend of mine has a mystery big cam in his motor. he is told that different cams require different valve lash settings. his cam is definitely a carb cam (big lift, big duration) - how would he know what to set his valves at? he says he has stock Sodium exh valves and stock intakes. |
Cap'n Krusty |
Jun 11 2005, 01:30 PM
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#13
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Cap'n Krusty Group: Members Posts: 10,794 Joined: 24-June 04 From: Santa Maria, CA Member No.: 2,246 Region Association: Central California |
He would ask the cam manufacturer ................. The Cap'n |
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Greg Bell |
Jun 11 2005, 02:28 PM
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#14
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Member Group: Members Posts: 137 Joined: 3-May 05 From: Warner Robins, GA Member No.: 4,024 |
But the cam is a mystery? I have a mystery cam in my car and I wonder the same thing.
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airsix |
Jun 11 2005, 03:24 PM
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#15
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I have bees in my epiglotis Group: Members Posts: 2,196 Joined: 7-February 03 From: Kennewick Man (E. WA State) Member No.: 266 |
Correct lash is a function of how much things tighten up at operating temp from thermal expansion. I doubt a cam change has much effect on this but possible if the cam is made from an alloy with far different properties from stock (not extremely likely). I'm with the Cap'n. I don't think running tight valves is a good idea. Too easy to overheat the valves. Less safety margin. For what? One hp? Two hp? Not worth it IMHO. I probably shouldn't be one to talk. I'm boosting the crap out of my poor little typeIV. In my defense, I am running plenty of lash though. (IMG:http://www.914world.com/bbs2/html/emoticons/wink.gif)
-Ben M. |
redshift |
Jun 11 2005, 03:36 PM
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#16
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Bless the Hell out of you! Group: Members Posts: 10,926 Joined: 29-June 03 Member No.: 869 |
I did mine all around like the clubsters were saying... .005, was great for tight sounding 1000 miles, then I jumped back to reality.
As of this moment, my valves are loose, and enough so to not make good power. (IMG:http://www.914world.com/bbs2/html/emoticons/smile.gif) M |
IanStott |
Jun 11 2005, 04:17 PM
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#17
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Member Group: Members Posts: 226 Joined: 13-June 04 From: Moncton,New Brunswick,Canada Member No.: 2,199 |
Any suggestions on where to get the right cam if you are running carbs? Is the valve adjustment different when you change the cam?
Ian Stott Moncton Canada PS. To Greg Bell, is your car black? I like the pic in your info section. Ian |
redshift |
Jun 11 2005, 04:27 PM
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#18
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Bless the Hell out of you! Group: Members Posts: 10,926 Joined: 29-June 03 Member No.: 869 |
The maker has specs for your valve adjust.
On the Webcam selection page (*haven't been there in a long time) there used to be specs written right there on the page, with the cam specs. M |
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