Excessive oil = overheat?

Peg has been running too hot for a while now. Not a mjor issue through
winter, but something I'd like to fix before summer.

Anyway I knew the oil level was a bit high, so I finally got round to
removing the excess. Took it for a spin and deliberatly sat idling in
heavy traffic for quite a long time. Lo and behold it didn't get nearly
as hot this time around.

Whether I was imagining it, or a cool breeze had whipped up or if it
really did cure it I'm not sure.

Some googling has yielded no evidence that excessive oil levels can
cause overheating.

Bear in mind the Peg is a dry sump engine, and the oil is kept in this
crazy frame resevoir above the engine with what appears to be a return
flow at the top that was possibly being intefered with by the too-high
oil level.

Anyway I guess we'll see as things get warmer over the next couple of
months.

 

Pegs and overheat....don't get started.
Check the Yahoo Pegaso Group for more.
http://autos.groups.yahoo.com/group/aprilia-pegaso/messages

Yep, too much oil can do it.
Forget the manual, oilchange with filter, refill with 1.75l , close the top,
run for 5 mins on high idle, top up with another 250ml.
Then ride, then allow to cool down for 20-30 mins, dipstick (don't srew in,
just sit on top of filler-neck) reading should be juuust above low mark,
perfect!
Further overheat-problems are:
Waterpump seal stuffed, fluid drips out of drainhole (in front of
water-pump-drain-screw), doesn't always show as puddle on ground.
Thermostat shot.
Leaking radiator cap (rare). Overflow hose disconnected.
And the big one (if no-one has ever retorqued the head on your bike):
head-gasket.
Check if your overflow-container keeps filling up, it pretty much recognized
as a head-gasket-symptom now.

cheers
pete

 

Cheers Pete.

I did torque the head when I did the valves; and the level in the water
resevoir has never changed so I'm confident it's not that.

No leakes from the drain hole, so the waterpump seal looks OK.

Just did another sit-in-traffic-in-the-sun and try to overheat the
bastard around Richmond. Kept it's cool nicely so I'm becoming inclined
to believe it was excessive oil.


Jules

 

That sounds better )