Thread: Oil / head gasket probme
01-03-2010, 09:41 AM #1
Oil / head gasket probme
Did some testing yesterday....all looked good except for two things.
I was blowing lots of smoke out of my catch can filter, and the catch can had about an inch of oil in it. only about 15 min of riding.
Also I have noticed a small amount of oil leaking at the rear left corner for my head gasket.
The oil in the catch can seems to be straight oil...if any fuel, very little...engine temps about 180...
I did double check the head bolts (re torqued them), checked the tops valve (swapped it with a new one), checked the camshaft positioning sensor, all nice and tight.
Any other suggestions?
01-03-2010, 09:47 AM #2
01-03-2010, 10:45 PM #3
Didn't do a leak down test...will do it soon.
yes the metal washer is in on the sprocket...
I loosened one bolt at a time and re torqued it according to the manual procedures...30 lb plus 120 than additional 90....(well just did 210).
Running a open loop so no clue about bubbles in the coolant.
01-04-2010, 08:56 AM #4
Was the motor just rebuilt? Another possibility if compression is good, is that the oil pressure regulator/bypass was overtightened/crushed or is stuck. This will allow oil pressure to rise too high, causing the exact symptoms you have.
01-04-2010, 10:12 AM #5
01-04-2010, 11:50 AM #6
It is not uncommon for this to be overtightened, crushing the 'cage' and leading to your issues. Easiest way to check is to attach a mechanical oil pressure gauge and check your oil pressure ... it is a bit different depending on what year your ski is, and where you attach the gauge to the engine. Best thing is to follow the procedure in the manual for your year of ski. Different years and different checkpoints will yield different oil pressure readings, but what I think you will find is that oil pressure rises too high as rpms go up.
01-04-2010, 12:46 PM #7
01-04-2010, 12:58 PM #8
01-05-2010, 05:59 PM #9
Did an oil pressure test today....
Engine cold idle 77psi
Engine at 176F idle 75psi
Engine at 4000rpm 90psi
The pressure looks to be really up there....would it run that high if the oil pressure regulator is bad or stuck open?
01-05-2010, 06:07 PM #10
Pulled from another post from the manual:
ALL 1503 4-TEC SUPERCHARGED ENGINES
Idle (cold) 400 - 497 (58 - 72) for a very short time
Idle (at 80°C (176°F) Min. 138 (20)
4000 - 7500 172 - 241 (58 - 72)
Test at the Cylinder Head Location
Remove plug located on cylinder head and install
Yours sounds high ... where did you screw in the gauge?
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