Been looking on eBay for some gaskets. Haven't ordered one yet but will when I've got enough information to tear the cylinder head cover off.
I kinda look forward to this stuff as long as it doesn't keep the bike laid up for too long. I'm a retired machine repairman and guess I miss, just a little bit, the hydraulic mist, slipped wrenches and dropped washers in dark places. :) On Mar 13, 8:53 pm, "Creative Residential Designs" <[email protected]> wrote: > Before you go though all of that hassle you'd best price out that cam cover > gasket, try and find at least a 1/2 dozen replacement bolts and figure a few > days to get it all back together. If it ain't broke, don't fix it. > HotrodMamma. > > ----- Original Message ----- > From: "tharrisn" <[email protected]> > To: "Nighthawk Motorcycle Lovers!" <[email protected]> > Sent: Friday, March 13, 2009 6:16 PM > Subject: [Nighthawk Lovers] Re: 650 engine noise > > According the the previous owner the engine was never opened before > but based on some scratches on the frame I do wonder. > > If air gets in a hydraulic tappet will it work its way out eventually? > I suspect not based on the cross section of a tappet displayed in the > shop manual. But, if there was air in a tappet wouldn't it collapse > each time the valve opens/closes which means the tappet would always > be noisy. In my bike's case the tappets do quiet down eventually. > > Is it possible to check these things visually, i.e. can I "rock" a > rocker arm and assume any that are loose have a bad/leaking tappet > under them. I would assume all of them should be tight against the > valve stem when the valve is closed and the cam lobe is at the > shortest radius to rocker distance. In other words when the valve > train is in it's most relaxed state for that valve. Even if I found a > couple bad ones with some sort of visual inspection I'd probably take > 'em all out and clean and bleed 'em if that's prudent. > > On Mar 13, 3:51 pm, [email protected] wrote: > > Perhaps the hydraulic tappets have been disassembled in an engine opening > > and not carefully bleeded before reassembling. If any air bubble gets into > > one of them, you surely get trouble. > > > At 09:33 13/03/2009 -0700, you wrote: > > > >Ok, I'm with you on your explanation. I too think there is dirt or > > >some other substance interfering with the hydraulic system related to > > >the zero clearance adjusters. Maybe in a oil delivery passageway or > > >probably more likely in the tiny hydraulic valve adjusters themselves. > > >Is this sort of thing prevalent with bikes that have been sitting more > > >than running? > > > >Bit of history about this bike. I'm the second owner and have been > > >able to chat extensively with the previous owner. With only 15k miles > > >he obviously didn't ride it much and when he did was only around the > > >block. Most of the miles were put on in the first few years of > > >ownership. The previous owner also delivered with the bike old service > > >records. A couple of those records indicated the original owner > > >complained about a tapping noise 20 yrs ago. At that time the Honda > > >service response was to rev it to 3,000 rpm 'till it goes away. Ok, > > >that works kinda but I'm not satisfied. > > > >I'm more than willing to take a methodical approach to really fixing > > >this thing. I plan to put a lot more miles on this bike than the > > >previous owner did in 25 yrs and want to make sure I've done my best > > >to help the bike deliver. > > > >So, I can verify the oil filter (Fram) is currently installed > > >correctly, i.e. the spring and seat are present and on the "cover end" > > >of the oil filter. The oil is fresh 5W-40 Shell Rotella-T and at the > > >proper level. What next? Is it possible to remove each adjuster, clean > > >and reinstall? I know you can't disassemble them but in your > > >experience will flushing them with kerosene or some other solvent > > >work? > > > >By the way, I purchased some used hydraulic adjusters from eBay in > > >anticipation of swapping parts for test purposes. In my makeshift > > >testing of the eBay adjusters they seemed to be fine. (I could not > > >collapse them without unseating the check ball. Although, I know it's > > >unlikely that I could physically exert as much pressure on them by > > >hand as they'd see in an engine.) > > > >Much thanks for your help. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Nighthawk Motorcycle Lovers!" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/nighthawk_lovers?hl=en -~----------~----~----~----~------~----~------~--~---
