have ya done any more rooting around in the engine???
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Oh poop
- Thread starter rustybronco
- Start date
Yes I have. I just came in from removing the exhaust cam and we now have a free spinner.
I have yet to measure the chain stretch, or have took a good look at the chain guides, but I plan on doing that a little a little later on. the tensioner appears to work correctly, but I still will tear it down and check it. Tomorrow I plan on welding an air line fitting to a spark plug shell so that I can check the leak down in the cylinders. if all go well in that department, then I will forgo the head removal.
At the moment too many projects are eating up my time, but rest assured I get at it asap.
I have yet to measure the chain stretch, or have took a good look at the chain guides, but I plan on doing that a little a little later on. the tensioner appears to work correctly, but I still will tear it down and check it. Tomorrow I plan on welding an air line fitting to a spark plug shell so that I can check the leak down in the cylinders. if all go well in that department, then I will forgo the head removal.
At the moment too many projects are eating up my time, but rest assured I get at it asap.
A small update...
"what I can see of the chain guide looks good"
http://www.alpha-sports.com/spst/1980 GS850G/03.gif
it looks like the top half of the rear guide is missing. there is nothing remaining from where the tensioner contacts the guide on upwards.
the saga continues.
"what I can see of the chain guide looks good"
http://www.alpha-sports.com/spst/1980 GS850G/03.gif
it looks like the top half of the rear guide is missing. there is nothing remaining from where the tensioner contacts the guide on upwards.
the saga continues.
Just might have a winner here...My vote's for the rear tensioner blade coming adrift, possibly the source of the "carbon squishing" sound.
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G
Guest
Guest
Wellsuh!
Wellsuh!
I guess there might still be something said for hangin' out in the service dept:-\\\ when I was supposed to be behind the parts counter or on the
sales floor
.
Wellsuh!
I guess there might still be something said for hangin' out in the service dept:-\\\ when I was supposed to be behind the parts counter or on the
sales floor
.
What's even better, is being a parts guy that has in the past wrenched for a living...
G
Guest
Guest
Symbiotic
Symbiotic
Makes one a better, by far, parts guy, and easier on the bod as well.
Symbiotic
Makes one a better, by far, parts guy, and easier on the bod as well
.
M
Matchless
Guest
Dale,
I lost my ADSL whille reading your thread, Monday evening. I was wondering if you have found any pieces of the chain guide?
Murphy's Law kicks in whenever you do not suspect it!
I lost my ADSL whille reading your thread, Monday evening. I was wondering if you have found any pieces of the chain guide?
Murphy's Law kicks in whenever you do not suspect it!
As you well know I'm getting older and the old eye sight is not what it once was. I took a better look at it last night with a flash light (torch?) and it's all there.
does Murphy's law apply to eye sight?
M
Matchless
Guest
Oh, I forgot what we were talking about!
Jokes aside, have you found the cause yet?
Not yet. I still need to weld an air line fitting http://www.sjdiscounttools.com/mils-727.html to a spark plug base so I can check the cylinder leak down. my plan is to do it tomorrow at work. 
I will measure the chain stretch when I get home this evening.
if all is well with the valves, chain and tensioner I will start re-assembling it, not having a clue as to why it did what it did.
DIY leak down tester http://www.vmaxoutlaw.com/tech/leakdown_tester.htm
EDIT... Cam chain 20 pitch length (21 pins c/l to c/l) service limit 6.213... measured 6.120... Ok
I will measure the chain stretch when I get home this evening.if all is well with the valves, chain and tensioner I will start re-assembling it, not having a clue as to why it did what it did.
DIY leak down tester http://www.vmaxoutlaw.com/tech/leakdown_tester.htm
EDIT... Cam chain 20 pitch length (21 pins c/l to c/l) service limit 6.213... measured 6.120... Ok
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UPDATE... I built a re-purposed DIY leak down tester (thread soon to follow).
cylinders 1 and 4 less than 5% leakage
cylinder#2 12% leakage out the intake valve.
cylinder#3 100% leakage.
time to remove the head and investigate.
cylinders 1 and 4 less than 5% leakage
cylinder#2 12% leakage out the intake valve.
cylinder#3 100% leakage.
time to remove the head and investigate.
Bummer and very strange. Sounds like something is holding one of the valves open.
M
Matchless
Guest
Dale,
Very likely a bit of carbon that could have been dislodged by the zip tie. Try to get the valve fully open and try and push the point of a zip tie through the clearance and maybe dislodge it? Compressed air via thin tube?
Good luck.
I've read here where people using the zip tie method have had a chunk of broken off zip tie caught under the valve holding the valve open. Not sure what's up with Dale's bike but red flag if the zip tie method was used.
I use the motion pro bucket tool, no left over pieces of a zip tie are possible.
I whacked the bucket with a piece of wood and a hammer to see if it was carbon on the exhaust valve keeping the valve open, but no such luck.
all I did last year was fire it up and shut it down. it didn't seem like it was running well on all four hence the reason for checking the valve clearances.
this thing sat for 9 years before I got it. so a valve hung open after sitting for that long is a possibility and that's my current thinking of the root cause.
I whacked the bucket with a piece of wood and a hammer to see if it was carbon on the exhaust valve keeping the valve open, but no such luck.
all I did last year was fire it up and shut it down. it didn't seem like it was running well on all four hence the reason for checking the valve clearances.
this thing sat for 9 years before I got it. so a valve hung open after sitting for that long is a possibility and that's my current thinking of the root cause.
T
TheCafeKid
Guest
Im banking on the cam chain guide, as said, or the cam chain itself has kinked at the crank and is binding it. Ive run into this problem a couple times myself, but only when Ive pulled and reinstalled cams and tensioners..
I don't see the cam chain, tensioner, or guides as being the root cause at this point.
there is definitely leakage past the exhaust valve in #3 . when I get some time later this afternoon to listen for air leakage into the crankcase and if I find it's all good there, I'll pull the head, recondition/renew the valves and slap it back together.
there is definitely leakage past the exhaust valve in #3 . when I get some time later this afternoon to listen for air leakage into the crankcase and if I find it's all good there, I'll pull the head, recondition/renew the valves and slap it back together.
you cant see anything from in the house!!!!!!!
EDIT::: forgot you have wireless.........
Dale, save that back of yours. With all of Chucks exuberance these days, I'd invite him over and put him to work. Sit back with a frosty beverage and bark out orders like a drill Sargent and that head will be off in no time.