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Discussion in 'Old's Cool' started by England-Kev, Nov 16, 2012.
Not going smoothly? It's a gorgeous 43 year old bike you're riding. Looks good from here.
There is a repair out there for those exhaust threads:
I don't hold this up as an example of the repair done right- this head was found to be cracked and was junked, but it's a possibility.
I think here in the U.S., Cycle Garden may offer this service...
My old goose seems to be fighting me at every step, I have had an annoying little leak of fork oil from the left hand fork since I bought the bike, I have since stripped cleaned, and refilled with fork oil, and still it drips on the garage floor, although it appears to be getting worse.
So on Sunday I again drained the fork, fitted a new stainless screw, with new sealing washer, and added some ptfe tape to the threads for good measure. So imagine my dismay when I went into the garage today to see another puddle of fork oil under the left hand fork.
So this time I paid a bit more attention to where it was coming from, and it would seem I have a leak at the weld on the fork bottom, as oil is above the screw, and also on the mudguard stays.:huh
More investigation on Saturday then.
damn! how would that thing break? must have been hit HARD!
I had a persistent leak like that on a customer's Ambo once. Nothing I tried with the drain screw stopped it. Turned out the leak was higher up - the o-ring sealing the fork slider to the chrome seal holder was missing. Once an o-ring was installed, the leak was gone.
..... and also run a small bead of JB Weld around the joint inside the chrome seal holders while you've got them off. Mine are as dry as a bone now.
I appear to have two leaks on the fork leg, yesterday I tied some cloth around the top of the slider, just under the chrome section, and another piece at the bottom just above the mudguard stays. Today when I checked the two pieces of cloth, the top one was wet, the bottom one was dry, butI still had oil on the drain screw.
So how do you get Guzzi forks apart, the Chilton book seems ever so complicated?:huh
Ok found it...... http://thisoldtractor.com/gtbender/moto_guzzi_loopframe_forks.htm
The oil is leaking from the chrome seal holder. The oil you found on the drain screw is the oil that has run down from the chrome seal holder and collected in the small nut retainer that is welded to the slider and to which the mudguard stay is attached. It has run from here to the bottom of the slider.
Dismantle the forks and replace the fork seals, the chrome holder 'o' rings, and JB Weld the joint inside the chrome holders. Refill with 30W oil. It is an easy job and Greg Bender's guide is very helpful. Don't worry too much about less than significant wear on the sliding parts. The forks are well-engineered and the tolerances can be much greater than those required for modern fork components. Indeed, I have found that simply turning the stanchions by 90 degrees will suffice to bring new friction surfaces together to compensate for wear. Of course, it is always a question of balancing the repairs one chooses against ones wallet.
For all this, as I previously mentioned, mine are now as dry as a bone and perform very well considering the age of this technology.
Good luck and keep up the great thread.
Couldn't have described it better myself
Easy! easy? I couldn't get the fork legs out of the tripple tree no matter how hard I tried:eek1 in the end I gave up and bolted everything back together:huh
I think my bike may well be visiting the Guzzi shop.
Here are the tapered top ends of the forks. These show an additional threaded piece which may or may nor be specific to the 74 Eldo, but that was not to problem when I was tearing down.
The 36 mm left fork top nut just spun right out of there, just like it shoulda...
The right nut and fork kicked my ass!!!
The problem ended up being, the tapered ends were not sucked up into the tapered receiver as well as they originally were.
The right one was not fit tightly, you can see the lump of grease on the taper. It should have been clean like the other.
When it came time to remove the 36 mm bolt, it's was sticky, but the whole assembly was spinning around underneath.
I ended up lifting the whole assembly up so the taper fit tightly and was able to extract the top nut.
It did it to me a coupla times. Sunuvabitch!!!!
If you "lift" the whole assembly the taper will reseat and you should be able to pull the topnut and the whole deal then comes apart as described in Italian...
The key is, you'll need to insert an appropriate washer betwixt top nut and tripple that will tightly suck up the taper. The top nut doesn't tighten down enough anymore without the washer.
If the taper's tight, the nut will pop every time...
PS My pics are dyslexic. What is the right fork is shown left.
My old guzzi does not have what you would call a proper oil filter, just a gauze in the sump. so I am thinking of adding two diesel inline fuel filters to the head feed pipes. one on each side to keep the oil pressure the same to both heads.
Now normaly according to my research filters are usualy fitted on a return line to the oil tank, but as the Guzzi doesn't have an oil tank, I therefore have no return line, so would fitting in a feed line cause problems, or is the return line thing just to stop debris reaching the oil tank as I suspect.
This is what I am thinking of fitting...
What do you all think?
Hey Kev this issue has been round and round and most of the guys riding theses bikes any distance would tell you that the factory setup with no filter is ok as long as you keep the oil changed often and clean the sump.
As far as adding filters they should be on the output or pressure side of the oil pump, but if you were to add externally then I would be concerned about extra places that could leak high pressure oil and if not caught quickly could mean big trouble for your new engine...just my $.02
Are you going to put a couple of hundred thousand miles on that bike? If so, it might be worth it - but probably not. I wouldn't bother.
The PO had put an external filter on my Eldo. On one trip I limped back from the Gaspe Bay with oil pissing out of the connectors. Its just one more potential source of leaks and road damage. My other roundfins are just fine without!
just asking questions my friends, we don't learn if we don't ask....
I hope that didn't come across as snotty - if it did, it certainly wasn't intended. I asked a similar question over on Wildguzzi early in my Guzzi life.
not at all Nick, no worries mate just thinking out loud really, as I wait to get time at the lock-up
Hey Nick, that 750S rocks man, I see one of those in my future
Just a short bimble on my Guzzi...
Just to warm it up so I could change the oils, and find the stripped threads left by a previous owner, that now need sorting out. Luckily they were only on a level screw, and not a drain plug.
I now have a new oil leak, after curing all the others, this time from the distributer, I guess there is an oil seal or o-ring at the base where it goes into the block.:huh
There is only so many places that oil can leak from Kev and you're fairly workin your way through them. Every one cured mate is a winner. Wish I could get started on the Ambo but must get the rest of the fleet ship shape first. Out on this years maiden voyage on the B33 today. God I love big British singles!