Posted by Datesfat Chicks on May 11, 2010, 8:57 am
My motorcycle is in the shop for a valve adjustment and other things.
Dumb question: How come my 1998 Ford Ranger doesn't need valve adjustments?
What is different? Hydraulic lifters? Or some other technology?
Thanks.
Posted by Bill Smith on May 11, 2010, 10:12 am
On Tue, 11 May 2010 08:57:38 -0400, "Datesfat Chicks"
>My motorcycle is in the shop for a valve adjustment and other things.
>Dumb question: How come my 1998 Ford Ranger doesn't need valve adjustments?
>What is different? Hydraulic lifters? Or some other technology?
>Thanks.
You answered your own question, hydraulic lifters. Hell, even Ferraris
have them now. The Honda Nighthawk was the first (in production) OHC
MC engine to get them as far as I know.
Bill Smith
Somebody will now chime in with a previous application of the
technology like, say, the Spagthorpe* Barn Swallow or some such thing.
*My spell checker suggested pathogen for this. :-)
Posted by Mark Olson on May 11, 2010, 10:55 am
Bill Smith wrote:
> On Tue, 11 May 2010 08:57:38 -0400, "Datesfat Chicks"
>
>> My motorcycle is in the shop for a valve adjustment and other things.
>>
>> Dumb question: How come my 1998 Ford Ranger doesn't need valve adjustments?
>> What is different? Hydraulic lifters? Or some other technology?
>>
>> Thanks.
>
> You answered your own question, hydraulic lifters. Hell, even Ferraris
> have them now. The Honda Nighthawk was the first (in production) OHC
> MC engine to get them as far as I know.
What's really neat about the Nighthawk's hydraulic lash adjusters, is that
they AREN'T lifters, per se. They do take up slack in the valve train in
exactly the same way a hydraulic lifter does, using check valves, etc. but
the "lifter" body doesn't move up and down, it's stationary. So you get
the benefit of zero lash and no adjustments, but you don't have to pay the
price (limited RPM) of lots of extra reciprocating mass in the valve train.
Pretty cool, I think.
IIRC the GL1200 and GL1500 also have hydraulic lash adjusters.
Posted by . on May 11, 2010, 11:30 am
> What's really neat about the Nighthawk's hydraulic lash adjusters, is that
> they AREN'T lifters, per se. They do take up slack in the valve train in
> exactly the same way a hydraulic lifter does, using check valves, etc. but
> the "lifter" body doesn't move up and down, it's stationary. So you get
> the benefit of zero lash and no adjustments, but you don't have to pay the
> price (limited RPM) of lots of extra reciprocating mass in the valve train.
> Pretty cool, I think.
That's the most informative and intelligent thing anybody has posted
to reeky in years...
Posted by Datesfat Chicks on May 11, 2010, 11:37 am
> What's really neat about the Nighthawk's hydraulic lash adjusters, is that
> they AREN'T lifters, per se. They do take up slack in the valve train in
> exactly the same way a hydraulic lifter does, using check valves, etc. but
> the "lifter" body doesn't move up and down, it's stationary. So you get
> the benefit of zero lash and no adjustments, but you don't have to pay the
> price (limited RPM) of lots of extra reciprocating mass in the valve
> train.
> Pretty cool, I think.
>That's the most informative and intelligent thing anybody has posted
>to reeky in years...
As a bonus, it was also related to motorcycles.
Datesfat
>Dumb question: How come my 1998 Ford Ranger doesn't need valve adjustments?
>What is different? Hydraulic lifters? Or some other technology?
>Thanks.