03 Ultra blowing oil through filter - Harley Davidson Forums: Harley Davidson Motorcycle Forum
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post #1 of 16 (permalink) Old 06-01-2019, 03:02 AM Thread Starter
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03 Ultra blowing oil through filter

Hi, have recently replaced stock cams with the S&S cam drive kit, original cam backplate & pump, S&S adjustable pushrod. It runs excellent but every now and then it blows oil out of the filter housing, especially if we go highway riding. Where have I gone wrong? And what would be the fix? In advance thanks!
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post #2 of 16 (permalink) Old 06-01-2019, 06:55 AM
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What your oil pressure?


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post #3 of 16 (permalink) Old 06-01-2019, 09:18 AM
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Originally Posted by Ole H View Post
Hi, have recently replaced stock cams with the S&S cam drive kit, original cam backplate & pump, S&S adjustable pushrod. It runs excellent but every now and then it blows oil out of the filter housing, especially if we go highway riding. Where have I gone wrong? And what would be the fix? In advance thanks!
Those could be your problem.
How many miles on the engine ?
Did the lifters get replaced ?

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post #4 of 16 (permalink) Old 06-01-2019, 05:26 PM Thread Starter
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Forgive my late reply, oil pressure is about 35 at Idle, 45 - 50 at 3000 rpm
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post #5 of 16 (permalink) Old 06-01-2019, 05:32 PM Thread Starter
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Yes, replaced lifters with the new ones from the S&S 510G Gear Drive Cams kit
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post #6 of 16 (permalink) Old 06-01-2019, 06:00 PM
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Yes, replaced lifters with the new ones from the S&S 510G Gear Drive Cams kit
So ... how many miles on your engine ???

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post #7 of 16 (permalink) Old 06-01-2019, 07:52 PM Thread Starter
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Has been changed speedometer a couple of times, but a qualified guess would be just about 100 000 miles
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post #8 of 16 (permalink) Old 06-02-2019, 07:28 AM
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Forgive my late reply, oil pressure is about 35 at Idle, 45 - 50 at 3000 rpm
By those numbers I'm thinking the cam plate relief valve could be stuck.
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post #9 of 16 (permalink) Old 06-02-2019, 09:08 AM
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Sounds like a stuck relief valve. Those oil pressures, at least idle are high.
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post #10 of 16 (permalink) Old 06-02-2019, 10:14 AM
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The relief valve bleeds off pressure at the high end - shouldn't effect idle pressure. You might want to verify the pressure with a mechanical gauge.

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