| Author | Message | ||
     Kyrocket |
Rear cylinder is dead, blowing back out the intake. Checked cams and timing. With front cylinder at TDC according to the mark on the flywheel the pinion shaft is at approx. 1 o'clock. If you back it off to 11 o'clock to match up all the cams it should be good to go. Front cylinder is awesome, making good compression. It has to be coming out through the intake valve of course... Nevermind, my life sucks right now, my rear cylinder's intake valve stuck open. No trip for me. I'm extremely bummed right now. This sucks out loud! | ||
| Malott442 |
wow that sucks! Hope you figure it out man! | ||
| Pkforbes87 |
sorry to hear that. Any damage? | ||
| Shot_gun |
Dude that blows but on the good side atleast you don't have to drop the engine in the front to get to it. Hopefully it's not a stuck tappet. Now I don't feel so bad about my oil leaks. | ||
| Brinnutz |
You didn't put the pushrods in the wrong side did you? Just a thought, and honestly, I have not f'in clue if that would cause it...Because right now I can't remember which is longer, thought it was the exhaust...But I've been wrong a lot in my life... | ||
| Pkforbes87 |
If the heads were assembled dry then a valve may have stuck due to lack of oil. I poured half a quart into the top of each rocker cover after I got mine assembled. The only downside is that it caused some seeping around the lower rocker box gasket the first time I started her up. | ||
| Kyrocket |
Man I was in a sour mood last night. Luckily the family had already gone to bed so I just sat and sulked. I was really wanting to go on this trip, but alas, the best laid plans... So now I need to figure out what exactly caused this valve to stick. I doused the top end with oil before I buttoned it up but I guess that could still be an option that it was just dry and locked up. It pushed back in with a light rap from a rubber mallet so it can't be bent too bad. I'll have to take it apart and check the innards to see what I need. What I really need is another bike to ride while this one is down. | ||
| Kyrocket |
Oh, and Brinnutz you're right the exhaust is the longer of the two, marked with three stripes but that wasn't my problem. | ||
| Nukeblue |
i believe everything happens for a reason. maybe its a good thing you're not going on the trip? just a thought | ||
| Oldog |
Michael: I am sorry to hear this, I know the feeling Mine is apart waiting on Cycle Rama to complete the head work and return them to me, I hope that you can find out why it stuck, I presume that the piston hit it? if not perhaps some light clean up and a few gaskets and also things like this happen for a reason. ( that you learn later ) | ||
| Kyrocket |
I agree, I know things happen for a reason but I've spent so many hours recently in my garage looking forward to this trip it was like a kick in the gut. My family was going to stay with my parents for the weekend, looks like I'll be with them also. Not a bad deal at all, just not what I had planned. I can't see that the valve is bent visually, don't know that it even is and when tapped with a rubber mallet it looks like it will seat exactly where it should. Can this happen? Can it come out the first time and stick there? I can see where it made contact with the piston but it literally looks like a scuff mark, can't even feel it with a fingernail. Perplexing to say the least. | ||
| Brinnutz |
Since this just happened, I think before I get her ready to fire, I'm going to put her in drive, and cycle the motor through and peep in and check to make sure they're are all going...Maybe I'll be a borescope from a buddy...That could be preventative yes? | ||
| Kyrocket |
Yeah if I had to do it over again I would do like I did last time and kick it up into fifth gear and turn it over by hand just to get it lubed up and listen for any contact then you may want to turn it over without plugs or rocker tops just to make sure your arms are moving correctly but if the tops are already on turn it over with the key and put your finger over the plug hole and make sure they're making compression. | ||
| Pkforbes87 |
I turned mine over with the top end 100% assembled. Had to pull the plugs. The 10.5:1 compression made just enough difference that I couldn't muscle it over with the plugs installed. If you don't hear contact while turning it over by hand, I would suggest turning it with the starter and the plug wires off. That's what I did in order to get oil circulating a bit before I actually let her start up. | ||
| Preybird1 |
Now thats a good idea PK There is a good chance it just bent the valve and stuffed the valve up into the ports, Check the intake for any metal bits. And check the exhaust can for metal pieces. These are easy and can be a damn good clue as to what happened and or broke. this was my first exhaust valve to go   I don't even want to talk about the second one that went |
