10-12-2013, 01:24 PM #1
Oil leak while not running, just sitting - ideas?
Ski: 2006 RXT
From where would it leak oil while sitting? I can clean out the bilge, look at it again in the morning and i have fresh oil sitting in the bilge.
it leaks at a rate of about 1 quart / week i would estimate
Ive rode it with the seat off, no evidence of any oil spraying anywhere, and no visible leaks from watching it run
From doing some searches, possible leak locations include
1. Oil Cap
2. PTO Housing
3. Oil pressure sensor under intake manifold
4. Bearing/Boot misaligned or loose
5. Loose cap bolt underneath block
6. Oil Cooler - no evidence of this from looking at it and feeling under it
7. PTO Bearing in Bellow – most common location
8. PTO Bellow not sealing to PTO Housing
9. Dip stick o-rings - i pulled intake manifold, no evidence of this
10. Front Oil pump housing
11. Starter motor o-rings
12. Crank shaft sensor
13. timing chain tensioner gasket ring
ill try cleaning the bilge and using the pad trick next
foot powder trick if that doesnt work
10-12-2013, 04:29 PM #2
10-13-2013, 08:58 AM #3
10-13-2013, 10:11 AM #4
I believe Pto seal/bearing is the place where I've seen the most leaks.
10-17-2013, 02:51 PM #5
After much reading, many tries at locating the leak on a friends 07 RXT, we finally found the crank position trigger/sensor to be the culprit. It leaked sitting, but worse riding, about a quart an hour riding. We isolated the leak to the rear of the motor using leak detector dye from autozone. Checked all the obvious things back there like the PTO boot... and eventually gave up and yanked the engine... The crank trigger was installed without the oring, done of course at the STEALERSHIP (Denney Marine by Lake Cumberland) most likely during some warranty work under the skis previous ownership.
Note to self: when your buddy is looking at a 4tec ski and it has an oil slick behind it coming in on the test ride, advise him not to buy it... At the time i figured it was spilled in the hull at the recent oil change, and when we arrived the oil cap was laying off to the side...
10-17-2013, 10:29 PM #6
^Truth^ The $30 dye kit from your local parts house is the best $30 you will spend finding a oil leak.
10-18-2013, 12:42 PM #7
- Join Date
- Apr 2013
- Maple Shade NJ
+1 on the Dye. I put the dye in the motor and ran it. I would let the motor cool down then place dry towels underneath the motor and throughout the hull. The oil has to drip down onto the towel from somewhere and then you can find your source. Mine was the oil cover on front of the motor. Ended up finding 2 torx screws in the hull that rattled out b/c previous owner didnt use loctite..
10-22-2013, 09:51 AM #8
Oh boy... all the screws in that 07 had anti-sieze... instead of loctite.... i'm surprised that more weren't loose. The only loose screws we came across were the intake hold down bolts... can you say " BOOST LEAK"... the previous owner had taken this ski to the local stealership to have all this lovely work done. The list of problems so far is: oil leak because of missing oring @ pickup sensor, loose intake bolts, and counting... Denney Marine in Albany, KY victimized this ski. This is the second ski i have worked on that had anti-sieze on the bolts in place of loctite... both from Denney.
10-22-2013, 10:34 AM #9
It's very very easy to mix up lock tight with anti seize.....
I bet they put the lock tight on the spark plugs...
10-22-2013, 07:08 PM #10
- Join Date
- May 2011
- West Texas
After my build last year was buttoned up and running, I noticed the same oil puddle forming over night. A few days and many obscenities later, I found the crank sensor's brown o-ring on the shop floor. Noooot cool, but completely my fault.
Glad you found the culprit!
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