The noise seems to be coming from the rear of the motor and it seems to be pulsing in time with piston movement.
I'm suspecting it may be related to the head bolt you had some trouble with -- like maybe exhaust being forced out in that location. A faulty gasket or the head not torqued evenly there might cause that. To pinpoint the location, try listening closer thru a cardboard tube (like comes with paper towels). If the noise is louder in the vicinity of that bolt, you have your culprit. To test for an intake leak, trying spraying WD 40 around the rubber intake tubes. If the engine runs faster, you're leaking vacuum. On Jul 9, 4:29 pm, Kevin Green <[email protected]> wrote: > So I've put almost 1500 miles on the bike in the last 4 months since I got > it running (which included removing and reinstalling the head with all new > gaskets), but as I was pulling up to my house a few days ago I noticed a > squeaking sound coming from the motor. When I started it back up this > weekend it started squeaking immediately (cold engine) and it increases > with the RPMs. On my car I would say it sounds like an accessory belt > squeaking, it's that kind of sound, but it's coming from inside the motor. > I also opened the filler/dipstick with the motor running and air and oil > came sputtering out at me, but I'm not sure that's not normal for a running > engine like this. I pulled the valve cover and adjusted the valves but > they weren't very far out of adjustment, so I don't think that was it. I > checked the torque on my head bolts, and they are all to spec, but I > noticed that the resistance in one of the bolts is all resistance in the > thread and not pressure from the bolt on the head. I'm wondering if > there's not enough pressure on the head and that's the source of my > leakage. Anybody have any thoughts or suggestions? > > -- > Kevin Green - Orlando, FL > --------------------------------- > 1982 Honda Nighthawk 450 - CB450SC -- 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.
