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Author Topic: Valve cover oil leak  (Read 1411 times)

Yoni159

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Valve cover oil leak
« on: January 06, 2020, 07:23:03 PM »
https://ibb.co/pK6Jpm1
I have a oil leak from the valve cover the mechanic told me i need to change to gasket ived change to original one but it did not help.. what can cause the leak?
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Stig / Major Tom

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Re: Valve cover oil leak
« Reply #1 on: January 06, 2020, 09:14:55 PM »
Gasket may not be aligned properly all the way around its circumference? Can you see or feel anything out of alignment?
Fasteners properly tightened, and none stripped?
Stig
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Boston Strong
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Yoni159

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Re: Valve cover oil leak
« Reply #2 on: January 06, 2020, 10:02:07 PM »
Yes everything sees alright
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Yoni159

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Re: Valve cover oil leak
« Reply #3 on: January 27, 2020, 02:40:21 PM »
Help?
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Stig / Major Tom

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Re: Valve cover oil leak
« Reply #4 on: January 27, 2020, 03:55:09 PM »
Quote from: Yoni159 on January 27, 2020, 02:40:21 PM
Help?
Wipe it clean.
Does it leave a puddle?
Is oil level correct on the dipstick?
Was oil overfilled recently?
After you ride it, does oil level drop on the dipstick from this 'leak' ?
Is the valve cover cracked?
If it is tightened properly with good gasket - then it is not the valve cover leaking.

Stig
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Boston Strong
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john grinsel

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Re: Valve cover oil leak
« Reply #5 on: January 27, 2020, 10:06:07 PM »
Try NEW gasket
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Yoni159

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Re: Valve cover oil leak
« Reply #6 on: January 28, 2020, 10:32:19 AM »
The gasket are new original kymco gasket . I wipe it to clean the oil,and when i ride again i can see a little bit oil again but not to much.but if i dont clean it once a week it will have a oil all over the place like the picture.no the oil level not overfilled now.. i checked the dipstick. The cover not cracked..
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mousejunks

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Re: Valve cover oil leak
« Reply #7 on: January 28, 2020, 10:40:11 AM »
The 4 valve cover bolts have their own seals. Check them for leaks.
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Yoni159

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Re: Valve cover oil leak
« Reply #8 on: January 29, 2020, 01:07:32 PM »
Yes cover bolts also leak... But only from buttom and gsaket leak only from buttom.
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Yoni159

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Re: Valve cover oil leak
« Reply #9 on: January 29, 2020, 01:52:05 PM »
I thought maybe i could use a thicker oil it will help? My oil now is 5w40
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CROSSBOLT

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Re: Valve cover oil leak
« Reply #10 on: January 29, 2020, 01:58:13 PM »
OK, then there is something gravely wrong. These are typically OIL TIGHT engine units. Like a Honda, they don't leak, drip or burn oil unles something is wrong. The valve cover is no exception. The cover goes on straight, no force reqired. The formed gasket fits PRECISELY and must be in the one and only correct position. The rubber grommets on the cover bolts and the gasket CANNOT be squashed too much because the special bolts will not allow it. Are ALL four cover bolts special or are they just metric bolts?

Thicker oil will take longer to make the same mess. Fix the problem.
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Karl

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Yoni159

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Re: Valve cover oil leak
« Reply #11 on: January 29, 2020, 02:20:12 PM »
All the 4 bolt are genuine original.
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Stig / Major Tom

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Re: Valve cover oil leak
« Reply #12 on: January 29, 2020, 02:29:33 PM »
So, as Karl says - gasket must be seated properly to insure a proper sealing.
If valve cover not cracked - and if oil IS coming from the valve cover - then gasket is not seated properly, or the 4 bolt seals have failed (aged?) and need replacing?

Stig
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Boston Strong
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CROSSBOLT

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Re: Valve cover oil leak
« Reply #13 on: January 29, 2020, 03:19:26 PM »
Like in this sketch?
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Karl

Three motorcycles 1960-1977 (restored a 1955 BSA)
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Yager 200i
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Stig / Major Tom

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Re: Valve cover oil leak
« Reply #14 on: January 30, 2020, 02:30:16 AM »
Very good, Karl!
Replace those rubbers and tighten properly to eliminate them as suspects.
Stig
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Boston Strong
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