Author Topic: Guzzi 8V tappet failure. WHY, and why not others? (Read 19047 times)

Vasco DG · « **Reply #30 on:** January 14, 2016, 03:27:20 PM »

Get pics. It's almost certain they'll be stuffed.

Pete

Gliderjohn · « **Reply #31 on:** January 14, 2016, 05:54:46 PM »

Quote from Vasco DG:

Quote

Get pics. It's almost certain they'll be stuffed.

Pics are part of the plan.
GliderJohn

MotoG5 · « **Reply #32 on:** January 14, 2016, 09:10:40 PM »

Good move John.

I made the same decision last fall. No symptoms of any kind. They were bad, did the pics and got the kit. Odds are you will see the same thing.

bib · « **Reply #33 on:** January 21, 2016, 08:52:37 PM »

Quote from: Vasco DG on December 22, 2015, 05:57:18 PM

As you say it has been covered in numerous other threads over the last seven years. I have reiterated my views and reviewed my opinions as new research had validated or discredited my suggestions. I've had considerable help from people who are a lot better qualified than me but they choose to remain anonymous which is fine. I feel that there is little to be gained by constantly groundhog day-ing the whole wretched topic. I think I have a pretty good idea why the DLC fails and why it wasn't a very good idea but every time I've explained and supplied references they are generally ignored and I simply get trolled so it really isn't worth me wasting my life on.

As it is I am now more focused on trying to get the problem rectified with as little grief and expense as I can for as many people as possible. Anybody else is more than welcome to continue to isolate the cause and prove me wrong. I care not.

Pete

Pete recently returned my 2012 Norge after installing the Roller conversion - am a happy MG rider again

The post roller bike 'feels' a little different to pre-roller bike but DAMN! it goes fantastic in the lower to mid-range rpms, will put a few more kay's on before taking it to 6000 and above.
Thank You Pete ... you did as you promised an am appreciative.

Wildguzzi.com · « **Reply #33 on:** January 21, 2016, 08:52:37 PM »

Vasco DG · « **Reply #34 on:** January 21, 2016, 09:01:10 PM »

excellent! Any problems, gimme a call.

Jdcooper · « **Reply #35 on:** January 22, 2016, 09:40:43 AM »

Does ANYONE know of a mech like Pete East of the Mississippi who has experience doing this mod ?
Pete's is AUS......a bit difficult to get at from Ohio USA.....

Dean Rose · « **Reply #36 on:** January 22, 2016, 10:05:52 AM »

Quote from: Jdcooper on January 22, 2016, 09:40:43 AM

Does ANYONE know of a mech like Pete East of the Mississippi who has experience doing this mod ?
Pete's is AUS......a bit difficult to get at from Ohio USA.....

How about Steve? the Mechanic that used to be at Riders Hill.

Dean

Vasco DG · « **Reply #37 on:** January 22, 2016, 11:16:55 AM »

Quote from: bib on January 21, 2016, 08:52:37 PM

The post roller bike 'feels' a little different to pre-roller bike but DAMN! it goes fantastic in the lower to mid-range rpms, will put a few more kay's on before taking it to 6000 and above.

On the running? That is because it's now tuned properly and I stuck a Beetlemap in it I expect. Rollerisation doesn't change a lot if you're running a closed loop factory map as the cam specs in terms of lift and duration aren't that wildly different that the stock map won't trim around them. The reason why it's so much nicer at the bottom end is it now has a log built open loop map that isn't continually trying to make itself incombustibly lean. Although counter intuitive you should also find your fuel economy will improve.

Pete

Jdcooper · « **Reply #38 on:** January 22, 2016, 03:39:08 PM »

Quote from: Dean Rose on January 22, 2016, 10:05:52 AM

How about Steve? the Mechanic that used to be at Riders Hill.

Dean

According to their website, Riders Hill is out of business. Bummer....

Vasco DG · « **Reply #39 on:** January 22, 2016, 03:51:31 PM »

Yeah but Steve's still working. He put up a link a week or two back when I asked where he was. Search his recent posts, you'll find it I reckon.

Pete

guzzisteve · « **Reply #40 on:** January 22, 2016, 04:10:09 PM »

Thanks Dean & Pete, not quite retired yet am working here--

http://www.mariettasportscar.com/sportscar-dealer-marietta/

Couple days a week, on Sat mostly w/wood shop is busy
I have a few lined up to check if weather would co-operate.

tazio · « **Reply #41 on:** January 22, 2016, 05:55:13 PM »

Quote from: Jdcooper on January 22, 2016, 09:40:43 AM

Does ANYONE know of a mech like Pete East of the Mississippi who has experience doing this mod ?
Pete's is AUS......a bit difficult to get at from Ohio USA.....

guzzisteve.

~ End of discussion.

Chuck in Indiana · « **Reply #42 on:** January 23, 2016, 05:46:22 AM »

If Steve can't get to it, Jim Barron of Rose Farm can..

guzzisteve · « **Reply #43 on:** January 23, 2016, 06:24:52 AM »

+1 on Jim

Jdcooper · « **Reply #44 on:** January 23, 2016, 09:33:08 AM »

Thanks for all the replies. Woodstock Illinois is 300+ miles closer than Marietta Georgia. I'll attempt to get in touch w Jim on Monday.
I've done a jug/piston replacement on a KLR a few years ago(very successfully), but major surgery on a Stelvio is a bit more intense than on a $1K Kaw.
I didn't really care if the Kaw blew up......

Vasco DG · « **Reply #45 on:** January 23, 2016, 03:22:13 PM »

If you can rebuild the top end of a KLR the Stelvio will be a snip.

Only thing is if you want to claim the kit from Piaggio you'll need the warranty process followed.

I'm doing a 'B' kit swap tomorrow and will try and vid the last remaining bits involved that I didn't show on the inspection film. 'C' kit is slightly more complex as you have to take the heads off to shim the valves but once the camboxes are off its only a matter of disconnecting the oil feed, removing the exhaust headers and un-bolting the inlet manifold and the head will tug right off.

Pete

Jdcooper · « **Reply #46 on:** January 23, 2016, 04:19:04 PM »

If this mod could be done WITHOUT removing the heads it would be MUCH easier (read less expensive). Here is a video of how to do exactly that.

https://www.youtube.com/watch?v=_uO5YayiLrA

The moderator talks about using either compressed air or rope inserted into the cylinder to support the valve while the keepers and spring are removed. If the Guzzi valve spring is as accessible on the bike as it is in the video (on a car), I don't see why this wouldn't work. I have a valve spring compresser and may give this method a try; thereafter the kit installation would be just like a "B" kit...once the valve spring shims are installed. Right ???

I wish it wasn't 10F out in my shop new.....

Chuck in Indiana · « **Reply #47 on:** January 23, 2016, 05:20:43 PM »

Quote from: guzzisteve on January 23, 2016, 06:24:52 AM

+1 on Jim

Didn't mean to take business away from you Steve.. just thought Jim would be considerably closer to the OP, and I know he can do the job, too.

guzzisteve · « **Reply #48 on:** January 23, 2016, 06:18:27 PM »

Chuck, Not taking any work from me. There are plenty of 8V's to go around !!!

Just how many have they sold since 09 till the rollers came out? I'll bet more than the Hydro motor bikes, and unfixed ones still coming in.

I have known Jim since around 82, we had shops 20mi from ea other.

Wayne Orwig · « **Reply #49 on:** January 23, 2016, 07:08:56 PM »

Quote from: Jdcooper on January 23, 2016, 04:19:04 PM

If this mod could be done WITHOUT removing the heads it would be MUCH easier (read less expensive). Here is a video of how to do exactly that.

https://www.youtube.com/watch?v=_uO5YayiLrA

The moderator talks about using either compressed air or rope inserted into the cylinder to support the valve while the keepers and spring are removed. If the Guzzi valve spring is as accessible on the bike as it is in the video (on a car), I don't see why this wouldn't work. I have a valve spring compresser and may give this method a try; thereafter the kit installation would be just like a "B" kit...once the valve spring shims are installed. Right ???

I wish it wasn't 10F out in my shop new.....

Sure. I thought about this.
But...........
1. You need to make a custom tool to compress the spring. Nothing like that exists for that head. I suspect the tool shown in the video is WAY too big to fit the tiny springs on the Guzzi 8V motor.
2. If you use air pressure, the engine may rotate if you don't lock it. Since the cam is out, the chain will flop around and the cam will now be WAY out of time. It will take a little more care to get it take in time.

In the end I gave in and just pulled the heads to do mine.

Vasco DG · « **Reply #50 on:** January 23, 2016, 07:24:00 PM »

Also once the cambox retaining nuts are removed there is nothing, (Apart from the two camchain tunnel clamp bolts.) holding the heads on. If you try and pressurise the combustion chamber the head will just lift unless you make up some spacers to go on the studs and re-torque the head/cambox nuts. What a PITA?

Seems like another one of those classic cases of someone trying to save time and effort by making things far more complicated than they are simply to avoid removing a couple more easy parts.

Rather than using compressed air you could always do the Rope Trick if you are determined to go down that fruitless path.

Pete

Chuck in Indiana · « **Reply #51 on:** January 24, 2016, 05:46:23 AM »

I've done the rope trick to airplane engines out in the field so I didn't have to pull the cylinder. If the head would easily come off it's kind of pointless, IMHO.

Vasco DG · « **Reply #52 on:** January 24, 2016, 01:19:42 PM »

On a Griso or Sport getting an 8V head off probably takes less time than pulling the head on one of the old pushrod motors. Really, it's that simple.

Pete

Daleroso · « **Reply #53 on:** January 24, 2016, 03:08:08 PM »

Humor me please. I got in on the end of this topic. What models & years does this problem exist?

Vasco DG · « **Reply #54 on:** January 24, 2016, 03:28:38 PM »

Any 8V Nuovo Hi-Cam made before about the middle of 2012.

twowings · « **Reply #55 on:** January 25, 2016, 07:33:07 PM »

Please forgive my ignorance...if one were to find and purchase an otherwise nice pre-roller Norge or Stelvio, would the necessary parts to convert be available for purchase from MG if one wasn't interested in pursuing a replacement claim? TIA!

MotoG5 · « **Reply #56 on:** January 25, 2016, 08:44:52 PM »

Quote from: twowings on January 25, 2016, 07:33:07 PM

Please forgive my ignorance...if one were to find and purchase an otherwise nice pre-roller Norge or Stelvio, would the necessary parts to convert be available for purchase from MG if one wasn't interested in pursuing a replacement claim? TIA!

I would say that you could.

Wayne Orwig · « **Reply #57 on:** January 25, 2016, 11:37:13 PM »

Quote from: twowings on January 25, 2016, 07:33:07 PM

Please forgive my ignorance...if one were to find and purchase an otherwise nice pre-roller Norge or Stelvio, would the necessary parts to convert be available for purchase from MG if one wasn't interested in pursuing a replacement claim? TIA!

At one time you could get them from Teo Lamers.

jim mac · « **Reply #58 on:** January 26, 2016, 02:37:06 AM »

Teo Lamers still has some in stock

Jdcooper · « **Reply #59 on:** January 26, 2016, 09:42:10 AM »

I got mine from AF1 Racing in Texas.

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Author Topic: Guzzi 8V tappet failure. WHY, and why not others? (Read 19047 times)

Vasco DG

Wildguzzi.com

Vasco DG

Vasco DG

Vasco DG

Vasco DG

Vasco DG

Vasco DG

Vasco DG

twowings