Help I have Rod knock on my engine

patineto · 03-09-2004, 02:53 PM

After a Typical weekend in the Dirt(for Golem)

a really strange noise develope on the right cilinder head, today i did all I possible can to figure out the cause of it and does not look like a Happy ending.
I check the cam chain tensioner,valve gaps,valve train, vertical play with out any luck, i guess is oficial my poor Golem is Ill to the point of no return,is kind of funny i confess I was sure she will dye in a honorable way like jumping down a clif or something but no she broad me home as ussual with out complain and then next morning(yesterday) let me know that something was really wrong,I don't really know what to do,I can describe the noise a top end "Rod knock"
mostlly present from 3000 to 5000 RPM's up and down trottle(makes me think is not related to the lack of presure on the cam chain tensioner)well I don't really know what to do now I guess was fun when it last after all the way I tread and mistread her was just matter of time,,I can safelly say this is the most Abuse and mistread "S" ever (that I know off so far)but don't take me wrong I did all the tuneups, adjustments and fixes require so the mecanical elements were taking care but at the same time I treat the poor thing super hard and oviuslly to the point of destruction,,
I think I have about 90,000 Milles since august of 2002 so i'm not complaining,the quality and reliability of this bike is Incredible,at least in my experience.

if anybody have sugestions or possible scenarios to explore please let me know..

she did great all weekend

roger albert · 03-09-2004, 03:53 PM

Well, if it's really rod knock, and limited to that, it can be addressed with the motor still in the frame. Not so bad. It's however a nearly unheard of failure mode on these motors. Keep us posted on what you find out. I'm curious

patineto · 03-09-2004, 04:48 PM

Quote:

Originally posted by roger albert
Well, if it's really rod knock, and limited to that, it can be addressed with the motor still in the frame. Not so bad. It's however a nearly unheard of failure mode on these motors. Keep us posted on what you find out. I'm curious

thanks for the good wish robert

I did have a Big end rod failure on one of this engine ones (with 132,000 miles on it)the shim(plain bearing) spun on the crank)
I think most be something to do with the time the bike spend on her side,,two period of at least 15 minutes not running of course,the other probable issue is that the heads were cover (fins fully pack in mud) and maybe that change the heat exchange caracteristics,,I try to clean them but for sure some was left..

anyway thanks for the nice words

RoundelRider · 03-09-2004, 06:13 PM

Ya gone that far to modify and create the bike you wanted, Id fix it, either rebuild or used engine replacement!

John

brad black · 03-10-2004, 03:05 AM

could be a cam losing a lobe. they make a rattly sort of sound.

patineto · 03-10-2004, 05:02 AM

Quote:

Originally posted by brad black
could be a cam losing a lobe. they make a rattly sort of sound.

I spin the engine by hand a few turns to check the valve train and everything was fine(for what I can tell)I re-check the valve clearance everytime and was totally consistent.
My problems is i don't have a place to work on her so for now I need to keep the bike in running condiccion just in case I find a place I can work on it and take it there...

Thanks for the Advice Brad,I for sure did not think of that one

JonyRR · 03-10-2004, 07:56 AM

Now THAT'S trailriding.....whoever rides one of those in the cowbell enduro and finishes on time should get the medal of honor (or pour 'le merite)....

patineto · 03-10-2004, 10:47 AM

Quote:

Originally posted by JonyRR
Now THAT'S trailriding.....whoever rides one of those in the cowbell enduro and finishes on time should get the medal of honor (or pour 'le merite)....

I think my friend jararilla did here is the POSTING

I also race the 100Mille race at the Elsinore gran prix last but I got DNF because I crash and damage my pelvis but more important i broke the sub frame mount so I was not able to continue
here is my REPORT

I can not complain for sure she have a "good" life so far,at least she experince a million things she was not sopposee to and all with stock rear suspension travel

brad black · 03-11-2004, 02:05 AM

it won't show up in clearances. in the ones i've seen the lobes lose their noses, and the lifters have been pitted.

you need to pull it all apart and inspect it.

patineto · 03-11-2004, 05:23 AM

Quote:

Originally posted by brad black
it won't show up in clearances. in the ones i've seen the lobes lose their noses, and the lifters have been pitted.

you need to pull it all apart and inspect it.

Maybe is time to change the CAM shaft for a less agresive profile in the search for better torque

any ideas,can that be done !?!?

thanks for the advice you guys are great and super helpfulll