 Problem with valve covers., This can't be a first.... |
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| KaptKaos |
 May 21 2008, 12:05 AM
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#1
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Family  Group: Members Posts: 4,009 Joined: 23-April 03 From: Near Wausau Member No.: 607 Region Association: Upper MidWest  |
My motor is a 1911 I got used. It has a carb cam of unknown spec. It runs pretty good. The valve adjusters are a swivel foot style adjuster and the top of the adjuster whacks the inside of the valve cover. This does two things. First, it eventually breaks a hole in the cover. Second, the tapping causes the valve cover to lift ever so slightly from the head, allowing the gasket to buckle a little and leak oil.
I assume I could swap out the adjusters with stock ones or I can cut the adjusters to make them a smidge shorter and re-tap them to make sure I can still use them. I was wondering if there is an option for a taller valve cover of some sort? I've seen screw on covers, but I am not sure how those work or if they provide any more clearance. Here is a picture of a busted valve cover from the last time this happened.  TIA |
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Replies(1 - 7)
| JB 914 |
May 21 2008, 01:32 AM
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#2
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Daddy! Finish my car NOW!!! Group: Members Posts: 1,593 Joined: 26-September 04 From: Garden Grove, CA Member No.: 2,831 |
Joe i have a set of valve covers that are not stock and i'm not using them. you are welcome to them. PM me.
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| Gint |
May 21 2008, 07:09 AM
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#3
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Mike Ginter Group: Admin Posts: 16,075 Joined: 26-December 02 From: Denver CO. Member No.: 20 Region Association: Rocky Mountains  |
I'm no expert, but I'm going to go out on a limb and say that the problem (and the solution) is probably not the valve cover but your valve train geometry.
Check out this recent thread: http://www.914world.com/bbs2/index.php?showtopic=81975& |
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| SGB |
May 21 2008, 08:06 AM
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#4
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just visiting Group: Members Posts: 4,086 Joined: 8-March 03 From: Huntsville, AL Member No.: 404 Region Association: South East States |
I think so too. Sounds like some kind of shim is need under the rocker arm blocks.
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| HAM Inc |
May 21 2008, 08:45 AM
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#5
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Senior Member Group: Members Posts: 846 Joined: 24-July 06 From: Watkinsville,GA Member No.: 6,499 Region Association: None |
Shorten the screws. It's that simple. That's what Jake does. He then reslots the ends for a screw driver. It also lowers the wt. of the assembly in the most wt. critical area of the entire valve-train. 1 gram of wt removed at the valve side of the rocker shaft will raise the redline ~25RPM's.
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| VaccaRabite |
May 21 2008, 09:02 AM
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#6
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En Garde! Group: Admin Posts: 13,446 Joined: 15-December 03 From: Dallastown, PA Member No.: 1,435 Region Association: MidAtlantic Region |
if you shorten the screws, don't you have to be really careful to keep them balanced? or does that not matter in this case?
Zach |
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| r_towle |
May 21 2008, 09:07 AM
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#7
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Custom Member Group: Members Posts: 24,577 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States 
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yes balance matters.
BUT its alot better to have a screw that is 1/5 a gram off then to have a hole in your valve cover... If you measure the screws prior to cutting, you should be able to get damn close to the same size. Leave some extra material sticking out that you can grind off the sides if you decide to balance them... I bet you could buy pre-made , pre-cut, pre-balanced screws from Jake is you ask nice. Rich |
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| KaptKaos |
May 21 2008, 09:24 AM
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#8
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Family Group: Members Posts: 4,009 Joined: 23-April 03 From: Near Wausau Member No.: 607 Region Association: Upper MidWest |
I'll check with Jake (IMG:style_emoticons/default/biggrin.gif)
This is one of those "while you're in there" jobs, as I have a leaky pushrod tube seal too. |
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