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V9x rearmain oil seal fail
Old 14-04-2018, 10:06 AM
Bluenav550 Bluenav550 is offline
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Location: Australia
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Default V9x rearmain oil seal fail

Hi guys I am new to the forum and wanted to know if any STX 550 owners have had a rearmain oil seal fail. I have had 3 fail in a row and am chasing any help??
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Old 15-04-2018, 08:24 AM
jonney jonney is offline
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Join Date: Apr 2014
Location: Sunshine Coast
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Thats no good. are you using a genuine seal ?
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Old 23-04-2018, 07:50 AM
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DIRECT Dent Repair DIRECT Dent Repair is offline
Join Date: Jun 2011
Location: west hoxton nsw
Posts: 61
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Is your Nav completely standard?
Any mods?
Do you have a catch can?
How many kms?

Excessive blow by will cause crank case pressure build up. A faulty pcv valve on back of turbo and/or incorrect catch can will cause an issue like this.
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Old 18-05-2018, 01:26 AM
nuthanav nuthanav is offline
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Join Date: Nov 2014
Location: Victoria
Posts: 22
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Hi All,
i'm installing a catch can this weekend to my ST-X V6. It is a Flash Lube type. (Pro Vent / Mann Hummel knock off).
I'm just think ing about the position of the can. I intend to locate it at the front of the engine bay, off the radiator support. The top of the can will be about level with the top of the radiator support or slightly lower. It may be higher than the PCV valve.
Will this matter?
If the oil in the vapor can drain back to the PCV valve when no engine running does this cause a blockage risk to the function of the PCV valve and then subsequent engine crank pressure issues. Like to know before I plumb it all up.
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Old 09-05-2019, 02:08 PM
Woody Woody is offline
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Join Date: May 2019
Location: Perth
Posts: 1

Just reading your post on rear main seal leak I have same issue with excessive blow by out of oil cap. Would like to know if catch can install and pcv valve replacement solved the issue?
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rearmain oil seal, v9x

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