Crank Pressure, DOH!

oKLRider

Active Member
Joined
Aug 27, 2012
Messages
397
Location
Ada, OK
I'm posting this so that someone may be able to learn from my mistake. I try to always go over steps and parts when disassembling/assembling something, but this time I goofed. ::010:: Here's the short version...

I meant to change the plugs and air filter at the 10k mark, but didn't find a roundtoit until recently (13k). Got the filter (oem), a set of plugs, and into I dove. Pretty straight forward other than the left side bodywork removal to get at the tank screw. ::010:: That's a design flaw. What's wrong with an access hole, or an accessible bolt head?! Tilt the tank, made note to release the drain lines first (learned that the hard way last time ;D ), and pull the air box cover. Change the filter, replace the lid, and pull the box, then vent hose and sensor connector. On to the plugs...

The vent hose is right in the way, so I wedge it up and out of the way under a frame rail. The spark plugs aren't exactly the easiest thing to change, either, but that's a different topic. Far left (#1? #2? Sorry, I haven't looked) plug boot must've had a bad seal because the plug was rusted up pretty bad. Replaced all plugs, and lubed up the boots, all back in place. Ok, all looks good. Reassembly time...

Everything when back together, no issues. Fired it up, ran good, road test, mission accomplished. Next day I notice some oil film on the right side. WTF?! I start mentally retracing my steps, and it hits me. I didn't reconnect that farking crankcase vent hose to the airbox, dayum! That afternoon I pull it all back apart, and reconnect the hose. It was still wedged in there, right where I left it. ::010:: Curiously though, there wasn't any spray coming from it. "The spray must be coming from the other end.", I thought. So I buttoned it up, and took another ride. Nope, not fixed! :'(

Immediately I was worried that I'd blown a gasket or hose somewhere, and that was my leak source. It was all on the right side, so I took the righthand bodywork off, along with the battery/electronics tray. Pulled it back, and voila. ??? It's hard to see, but the cam access plug on the gasket had popped out of the channel!

It's pretty obvious to those familiar, but to those that aren't I've added the arrows. At least now I know where the weakest link is. :D




The rubber was way too tight to simply push back in, so I loosened the valve cover up at all six bolts. Didn't remove it, but popped it up enough to shove the rubber back in. It didn't take much, and fell back into place pretty easily. So far it's holding up fine after idling up to fan temp, cooling, and then a trip down the road and back. ::008::

Taking it by the car wash this evening to give it a good douche. It only takes a moment to overlook something small, so keep your eyes peeled! ::003::
 

Xdriver

New Member
Joined
Nov 19, 2012
Messages
135
Location
DFW, TX
I had the rusted number 1 plug as well. Good catch on finding where the oil was coming from. A nice heads up for the rest of us.
 

Karson

Active Member
2012 Site Supporter
2013 Site Supporter
2014 Site Supporter
Joined
Feb 26, 2012
Messages
2,001
Location
IOWA
Yep that's one of those gotcha's that will get you every time if you've got a pinched gasket...at least you caught it before it ran dry, but I'd think the oil level light would've gotten your attention before that every came into play
 

Mark R.

Member
Joined
Aug 7, 2012
Messages
593
Location
Albuquerque, NM
Did you ever lift that cover while performing your service? If not, it was probably like that since day one. And if so, that would be a pretty major assembly goof from the factory.

BTW, that little half circle plug is not to access the cams. It is there because during the machining of the head, the journals that the cam ride in, as well as the cam caps, are drilled at the same time from the side. That is why with many motorcycles you cannot buy a replacement cam cap, as they are all machined with their matching head, and replacements will not fit right.
 

oKLRider

Active Member
Joined
Aug 27, 2012
Messages
397
Location
Ada, OK
Mark R. said:
Did you ever lift that cover while performing your service? If not, it was probably like that since day one. And if so, that would be a pretty major assembly goof from the factory.
No, the cover has never been off (to my knowledge). Bought with ~4500mi on it, now I'm ~13500mi. Never had a leak before pinching the hose, so I don't see how it could've been there from the factory. ???


Mark R. said:
BTW, that little half circle plug is not to access the cams. It is there because during the machining of the head, the journals that the cam ride in, as well as the cam caps, are drilled at the same time from the side. That is why with many motorcycles you cannot buy a replacement cam cap, as they are all machined with their matching head, and replacements will not fit right.
I wasn't referring to access from the outside, ala pulling the 'plug' for a looksee, but more for valve checks etc. when the cover is off. Makes sense that they're all machined together though, good info. ::008::
 

NoMorBills

New Member
Joined
Sep 19, 2011
Messages
232
Location
Chandler, AZ
""""Never had a leak before pinching the hose,"""

That is what happened. Pinched the hose and the crankcase had to vent somewhere. So it pushed out the gasget.
 
Top