| Author | Message | ||
     Gmaan03 |
So I pulled it off again checked EVERY thing looks OK. I cranked the motor while the cover was off, oil is pumping fine. Put the rocker boxes on but left the covers off. I started the motor and oil is pumping up good into the valve area. I started the bike and the lifters are ok now when idling, but the metallic knocking is still present when the motor is revved about 2K and was backfiring. I checked the spark and found the rear cylinder is not firing good????? I can start the bike with just the front plug hooked up, but when changed to the rear only it will not start. Will a improperly firing cylinder cause this metallic sound from the motor pushing a dead piston? | ||
| Duceater |
maybe try swapping plugs (front to rear and rear to front), to check if the plug is bad. If no change... You could also check to see if there are any breaks in the plug wire insulation. It could be grounding out somewhere. If nothing there, somehow you could check the output at the ignition. Service manual may have a procedure for that. | ||
| Gmaan03 |
Did the swap thing. but will it cause a metallic knocking if dead? | ||
| Duceater |
can you tell what region the sound is coming from? I've heard a metallic knocking on my bike when I have an exhaust leak. Sounds like a tick-tick-tick. That would be close the right side of your bike. | ||
| Natexlh1000 |
Metallic knocking sound + missfiring = check your sparkplug's electrode for something smashing into it! The only thing that can smash into your spark plug that I can think of is the piston or if something got by your airfilter. Good luck man! | ||
| Dave_02_1200 |
Have you verified that the cams are timed correctly? If the valves are opening too soon or too late, parts can hit each other. | ||
| 01x1buell |
i wish i could help,but have never run into this yet.. goodluck man hope everything works out fine. | ||
| Gmaan03 |
I checked and double checked the valve timing it is good. I do think it is due to a dead cylinder but need verification of this problem. | ||
| Gmaan03 |
no it is a metallic sound not an exhaust leak | ||
| Jim2 |
I looked at the pictures you provided in the previous post. The picture is not good enough to show the cam dots and gear tooth lines that are used to align the cams. I think; however, that I can see the dot on the far left (back) #1 cam and the dot is not aligned properly with the #2 gear next to it. That is the best I can get from the pictures. | ||
| 01x1buell |
i believe the pis that you are looking at are mine??? if they are the ones a posted i never removed any of the cam gears so how would they not be alligned correctly??? | ||
| Jim2 |
Yes, your pictures. I didn't know that your cams were not removed, so please disregard my posts. I wasn't making fun of your pictures, I just couldn't see the alignment markings on the cams. | ||
| 01x1buell |
ohh please its all good i never thought you where making fun of anything, i was just wondering about the paint marker writing on the inside of the case there thats all.. | ||
| 01x1buell |
what sort of sound is it??? a tick ,tap or what?? | ||
| Jim2 |
I'm not sure what you did or didn't do before when replacing the gasket but did you take out the hydrolic lifers? I hear they can make quite a racket for awhile after re-assemble before they pump up again. | ||
| Jim2 |
Oops, I should stay away from the board right now. I was thinking 01x1buell and Gmaan03 were the same (I didn't look very good), and that the two threads were related. Sorry guys.  | ||
| 01x1buell |
well i hope gmann figures his noise out since we both did the same gasket replacement ,i decided to go by the manual except for removing the lifters, | ||
| Bigslug |
Did you get a cam cover gasket for the 99-earlier motor by mistake? http://www.badweatherbikers.com/buell/messages/384 2/13216.html#POST105395 Mike | ||
| Gmaan03 |
I specifically asked for a 2001 gasket, problem is, I did not check the old with the new gasket! I placed the new gasket over the oil channels and it looks right????? The sound is a metallic sound, will a dead cylinder cause this sound? I can start the bike with both plugs hooked up and both exhaust pipes get hot, but it seems the rear cylinder is not firing correct. | ||
| Kilroy |
Why don't you record this sound and post it to youtube or somewhere where we can listen to it. | ||
| Gmaan03 |
Looking at the link above I do have the proper gasket | ||
| Gmaan03 |
I will try to record the sound today. I am going to check my coil today and see if it is bad. the wires look good, replaced the plugs, but it was late last night and I did not want to start the bike with out a muffler, neighbors would not be happy! | ||
| Kilroy |
I think a major internal failure or internal parts smacking into each other would be described differently than a "metallic" sound. It would be a violent event and the motor would most likely not run at all (DAMHIK). If you have your air filter assembly off you may just be hearing the intake valves through the carb. These are LOUD valvetrains. Kilroy | ||
| Gmaan03 |
Can some one do me a favor. Go out side start your buell then remove the rear spark plug wire and rev it a little let me know what the sound is like. | ||
| Ratbuell |
Mine sounds like a Blast with one wire unhooked. No clanging, no clanking, just a misfire thump-thump cadence. If you're getting clanging...something broke. Or bent (pushrod?). Pull your rockerboxes, and your rockers. Then pull the pushrods out of the tubes. Roll them on a piece of glass. If it's bad enough that its clanking, you'll probably be able to see the pretzel-bend...but that's where I'd start. | ||
| Harleyelf |
Yes, absolutely, Rat has something. A pushrod clanging against the tube would sound metal-on-metal and the bike would still run. Can you hold each pushrod tube with your fingers while the engine is running? Before it gets hot, preferably. If that's it, you'll feel one tube kick with each clang. The hydraulic lifters would allow the valve to function even with a shortened (bent) rod. | ||
| Fast1075 |
You can have a bent exhaust valve and both headers will feel hot because exhaust gas can back up the pipe. Hope it didn't suck a valve. It's a tuber, so it is pretty easy to pull the top end. If it was mine, I would pull the cylinders and check things out. | ||
| Preybird1 |
You could scope out the valves through the intake to see if they are bent just to make it a little easier. Just take it off and get a light in there and take a peek. When my first exhaust valve broke it dropped down and the piston bent it and crammed it up into the guide. The bike kept running on the rear cylinder and it backfired and sounded awful.  | ||
| Gmaan03 |
My push rods are fine, I checked them this last time to opened up the cases. I will check compression today to see if a valve is not sealing. I do not have the tools to do a leak down test so compression will have to do. | ||
| Gmaan03 |
If I cant figure it out today I will have to bring it in to JT&S performance, Jim will know in a second. I just need to find a truck to haul it down. GRRRRRRRRRRRRRRR |
