• Ciao Guest - You’ve landed at the ultimate Guzzi site. NEW FORUM REGISTRATIONS REQUIRE EMAIL ACTIVATION - CHECK YOUR SPAM FOLDER - Use the CONTACT above if you need help. New to the forum? For all new members, we require ONE post in the Introductions section at the bottom, in order to post in most of the other sections. ALWAYS TRY A SEARCH BEFORE STARTING A NEW TOPIC - Most questions you may have, have likely been already answered. DON'T BE A DRIVE-BY POSTER: As a common courtesy, check back in and reply within 24 hours, or your post will be deleted. Note there's decades of heavily experienced Guzzi professionals on this site, all whom happily give endless amounts of their VALUABLE time for free; BE COURTEOUS AND RESPECTFUL!
  • There is ZERO tolerance on personal attacks and ANY HYPERLINKS to PRODUCT(S) or other competing website(s), including personal pages, social media or other Forums. This ALSO INCLUDES ECU DIAGnostic software, questions and mapping. We work very hard to offer commercially supported products and to keep info relevant here. First offense is a note, second is a warning, third time will get you banned from the site. We don't have the time to chase repeat (and ignorant) offenders. This is NOT a social media platform; It's an ad-free, privately funded website, in small help with user donations. Be sure to see the GTM STORE link above; ALL product purchases help support the site, or you can upgrade your Forum profile or DONATE via the link above.
  • Be sure to see the GTM STORE link also above for our 700+ product inventory, including OEM parts and many of our 100% Made-in-SoCal-USA GTM products and engine kits. In SoCal? Click the SERVICE tab above for the best in service, tires, tuning and installation of our products or custom work, and don't miss our GT MotoCycles® (not) art on the BUILDS tab above. WE'RE HERE ONLINE ONLY - NO PHONE CALLS MADE OR RECEIVED - DO NOT EMAIL AND ASK QUESTIONS OR ASK TO CALL YOU.
  • Like the new V100, GuzziTech is full throttle into the future! We're now running on an all-new server and we've updated our Forum software. The visual differences are obvious, but hopefully you'll notice the super-fast speed. If you notice any glitches or have any issues, please post on the Site Support section at the bottom. If you haven't yet, please upgrade your account which is covered in the Site Support section or via the DONATE tab above, which gives you full site access including the DOWNLOADS section. We really appreciate every $ and your support to keep this site ad-free. Create an account, sign in, upgrade your account, and enjoy. See you on the road in 2024.

1978 V50 oil leak

N

Nago

Just got it firing!
Joined
Feb 7, 2022
Messages
5
Location
Austin, TX
I have posted before about the 1978 V50 I picked up a while back. It supposedly only has 1500 original miles on it. I rebuilt the carbs and tweaked a few other minor things but I runs great. It does have a starter button glitch witch I am trying to work out. When I can get it started is runs great.

The main problem I have now is it is leaking quite a bit of oil. My theory is that it sat for so long and the gaskets dried out and now it runs fine but leaks a ton of oil. There is a small puddle of oil on the case under the air box. See my photos. Do I need to breakdown the engine and reseal it? Is this easier than a rebuild. With only 1500 miles, I am wondering if I can just replace gaskets and bolt it back together?

IMG 6764
 

Attachments

  • B42D949E-88D4-4300-B7AF-E833A93EFB83.jpeg
    B42D949E-88D4-4300-B7AF-E833A93EFB83.jpeg
    136.3 KB · Views: 10
  • 30D3724C-7682-4C21-BF2E-8203D0C07ADF.jpeg
    30D3724C-7682-4C21-BF2E-8203D0C07ADF.jpeg
    161 KB · Views: 10
44 year old gaskets were guaranteed to leak. The bike hasn’t run for decades and the metal hasn’t expanded and contracted but every gasket has fused to its surrounding metal. It’s only logical that those gaskets are now literally tearing a little bit every heating and cooling cycle.

I wouldn’t plan an engine teardown but I would be looking at base gaskets, head gaskets, oil pan gaskets at a minimum. If the base gaskets haven’t started to leak, they will eventually.

If it was mine, when I eventually removed the cylinders, I would leave the pistons inside the cylinder, lowering them only enough to remove the wrist pin so as to leave the piston in place in the cylinder. Then you won’t have to worry about new rings and honing the cylinders, saving you time and money.

It is very rare that leaking develops between the engine case halves as this is really sealed well to begin with and the surfaces are machined and highly stable in their expansion and contraction.
 
Is that engine oil or is it from the gear box vent?
Did you replace the gear box oil and how much did you refill?
You could try attaching a hose to the vent to see if it collects oil.
Search the internet for remedies for this annoying vent.
 
Enjoy your ride, mate. This is not an issue, this is a feature of these bikes. And a dozen of other features, which don't affect the ride. These bikes will be 50yrs old soon, don't spoil your day detecting their gimmicks:)
 
You must log in or register to reply here.
Back
Top