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From: Hog on 6 Jul 2010 10:42
TOG(a)Toil wrote:

> Actually, I've never really seen the point of a pressure warning
> light. By the time it comes on, the damage is usually done. Oil
> *level* lights, as used by some car manufacturers (and some motorcycle
> builders too) always struck me as a more sensible gadget, given that
> most lube failures seem to be due to numpty owneers forgetting to top
> up the sump.

Would it seem sensible to dump the oil and have the filter out for a new
one, checking the oil for "bits", then looking over the water/oil pump. None
of it being hard to reach.

Could talk to your tame specialist first and ask him if it is unusual.

It's of an age where the rubber seals in the pump might be hardening, if you
happen to be in there.

--
Hog


From: Datesfat Chicks on 6 Jul 2010 10:43
"TOG(a)Toil" <totallydeadmailbox(a)yahoo.co.uk> wrote in message
news:f4d3585c-7ef0-4e35-b837-148251aca668(a)a30g2000yqn.googlegroups.com...
On 6 July, 14:00, "Datesfat Chicks" <datesfat.chi...(a)gmail.com> wrote:
> "The Older Gentleman" <totallydeadmail...(a)yahoo.co.uk> wrote in
> messagenews:1jl7566.bsq2kf1wotrj0N%totallydeadmailbox(a)yahoo.co.uk...
>
> First, was that a typo? Did you mean the OIL light flickering? That would
> seem odd.
>
> Not really. It doesn't take much to get oil temperatures high enough
>for the oil to thin noticeably.

Never thought of that. Interesting.

>Actually, I've never really seen the point of a pressure warning
>light. By the time it comes on, the damage is usually done. Oil
>*level* lights, as used by some car manufacturers (and some motorcycle
>builders too) always struck me as a more sensible gadget, given that
>most lube failures seem to be due to numpty owneers forgetting to top
>up the sump.

I have to defer to everyone else on this newsgroup (because I have so little
experience), but ...

How would you justify the statement that the damage is already done? I
would have made a few assumptions:

a)The threshold for the oil pressure switch isn't zero pressure (it is some
higher number).

b)Once the oil pressure drops to a level that is too low, no damage is done
yet and won't start to be done for at least some tens of seconds.

c)Oil pressure would probably not drop to zero suddenly (usually), rather it
would simply get lower and lower, so you probably usually have more than
tens of seconds until damage occurs.

The standard procedure for starting an airplane is start the engine, and if
the oil pressure isn't active within at most 30 seconds, stop the engine
immediately. I think most pilots would stop the engine sooner, especially
if the engine was warm and there is no reason for a lag in engine oil
pressure indication.

On my motorcycle, I check the oil pressure indicator every time. When I
turn the key on, I verify that I have the light. When I start the engine, I
verify that the light goes out. If the first test fails, I _might_ ride it
to the dealership if I didn't suspect a problem. If the second test fails,
if I couldn't diagnose it, it would go to the dealership on a trailer.

Datesfat

From: The Older Gentleman on 6 Jul 2010 14:19
? <breoganmacbrath(a)yahoo.com> wrote:

>
> Modern liquid cooled sportbikes are not intended to be ridden slowly
> in heavy traffic

Yes, they are, you idiot..

>and the cooling system is designed more for
> temperature stabilization so the machine can pass EPA emissions tests.

No. It's designed more because if you're aiming to get close to 200
horsepower out of a one-litre engine, air-cooling won't disperse the
heat that it produces, you idiot.
>
> My 1974 Suzuki GT750 Water Buffalo

Irrelevant, you idiot.


--
BMW K1100LT Ducati 750SS Honda CB400F Triumph Street Triple
Suzuki TS250ER GN250 Damn, back to six bikes!
Try Googling before asking a damn silly question.
chateau dot murray at idnet dot com
From: S'mee on 6 Jul 2010 14:43
On Jul 6, 12:19 pm, totallydeadmail...(a)yahoo.co.uk (The Older
Gentleman) wrote:

> > My 1974 Suzuki GT750 Water Buffalo
>
> Irrelevant, you idiot.
>

esspecially when one takes into consideration that he's never owned
such a motorcycle.
From: ? on 6 Jul 2010 15:35
On Jul 6, 7:43 am, "Datesfat Chicks" <datesfat.chi...(a)gmail.com>
wrote:

> b)Once the oil pressure drops to a level that is too low, no damage is done
> yet and won't start to be done for at least some tens of seconds.

Did you ever "lug" the engine of a manual transmission car or truck?

The low frequency groaning sound of "lugging" occurs because there
isn't enough oil pressure at low RPM to cushion the mechanical parts
from contacting each other.

Now, imagine you're riding a motorcycle at high RPM, and you lose oil
pressure.

The mechanical parts are going to hit each other at a much higher
frequency, but it's still metal-to-metal contact...
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