Author Topic: This should get all the scaredy cats wetting themselves! (Read 10461 times)

beetle · « **Reply #30 on:** November 12, 2018, 04:25:58 AM »

Quote from: pete roper on November 12, 2018, 04:00:01 AM

Perhaps I did that because I'm a real snake with a hidden agenda.

.................

Don't forget 'venal' and 'Machiavellian'.

pete roper · « **Reply #31 on:** November 12, 2018, 04:30:06 AM »

Sorry, I’m five beers in so my vocabulary is somewhat restricted

lucian · « **Reply #32 on:** November 12, 2018, 06:38:57 AM »

Was this a flattie ? Maybe the flinger plate was miss aligned when Rollerized. Perhaps all who have had their 8v flatties rollerized should take a quick peak at the cam sprockets for good measure. I know I will be. Easy enough on a griso anyway. That is one robust motor to take that and have such minimal damage, or just shit luck. Good luck with the remodel Pete, as always thanks for sharing.

pete roper · « **Reply #33 on:** November 12, 2018, 08:31:22 AM »

Pretty sure it was a factory roller bike. All the witness marks appeared to be intact.

Wildguzzi.com · « **Reply #33 on:** November 12, 2018, 08:31:22 AM »

Wayne Orwig · « **Reply #34 on:** November 12, 2018, 09:29:58 AM »

Never understood why the hole is in the flinger plate in the first place.

Sasquatch Jim · « **Reply #35 on:** November 12, 2018, 09:41:36 AM »

Years ago I saw a piston hanging over a workbench in a shop. It had a valve jammed into it the same way.
I asked the mechanic for the story and he said a Harley rider came in complaining that his engine was missing on one cylinder.

Two Checks · « **Reply #36 on:** November 12, 2018, 10:13:30 AM »

That engine is now a piston port single....

Chuck in Indiana · « **Reply #37 on:** November 12, 2018, 11:14:58 AM »

A guy came in with a Stinson (Franklin opposed 6) one day and said it was a little down on power. Two of them would never run again..

pete roper · « **Reply #38 on:** November 12, 2018, 11:15:43 AM »

Quote from: Wayne Orwig on November 12, 2018, 09:29:58 AM

Never understood why the hole is in the flinger plate in the first place.

You and me both??? Unless it's something to do with its manufacture there is no reason for the holes at all.

gearman · « **Reply #39 on:** November 12, 2018, 11:38:48 AM »

Quote from: Sasquatch Jim on November 12, 2018, 09:41:36 AM

Years ago I saw a piston hanging over a workbench in a shop. It had a valve jammed into it the same way.
I asked the mechanic for the story and he said a Harley rider came in complaining that his engine was missing on one cylinder.

How could the rider tell?

John A · « **Reply #40 on:** November 12, 2018, 12:16:29 PM »

Quote from: gearman on November 12, 2018, 11:38:48 AM

How could the rider tell?

99% of Harleys are still on the road.
the other 1% made it home

rschrum · « **Reply #41 on:** November 12, 2018, 05:20:24 PM »

Good one John!

pete roper · « **Reply #42 on:** November 12, 2018, 07:59:47 PM »

As you can see the valve punched right through the deck of the piston!

The damage was directly on top of the rod though so the force wasn't a bending one. As I said I checked the rod by sticking a straight edge across the top of the bore and then slipping feeler gauges between it and either side of the piston. There was no discrepancy, everything moves nicely. Visually it all looks fine.

Second hand piston and new rings and gasket and it's all looking pretty dandy!

Now I've just got to wait for the head to come back from the head shop and I can get serious about seeing if it's going to make any horrid bottom end noises!

Pete

Chuck in Indiana · « **Reply #43 on:** November 13, 2018, 06:33:38 PM »

Attaboy, Pete..

Paul Brooking · « **Reply #44 on:** November 13, 2018, 06:52:49 PM »

Quote from: pete roper on November 12, 2018, 07:59:47 PM

Now I've just got to wait for the head to come back from the head shop and I can get serious about seeing if it's going to make any horrid bottom end noises!

Pete

Are you talking about the engine or the rider next time he or she takes the bike out?

Utrider · « **Reply #45 on:** November 13, 2018, 07:33:39 PM »

Pete, I really appreciate this arms length tutorial....... YOU ROCK!

Huzo · « **Reply #46 on:** November 13, 2018, 08:52:33 PM »

Quote from: Paul Brooking on November 13, 2018, 06:52:49 PM

Are you talking about the engine or the rider next time he or she takes the bike out?

Has probably evacuated the colon after hearing the bang..!

cliffrod · « **Reply #47 on:** November 13, 2018, 09:27:32 PM »

If you can't afford to fix them, you can't afford to own them... Welcome him to the fold.

I've got a (non-Guzzi) piston top half with a valve head still parked in it, hanging on the wall in my shop. Dad said "It was running ok but but smoked a little and had a bad miss". It's right beside a pinion from my v7 sport with 5 roller bearings welded to the shaft, courtesy of the p.o.

pete roper · « **Reply #48 on:** November 13, 2018, 11:05:58 PM »

It shouldn’t of needed fixing, that’s the thing. By the numbers it’s a factory roller and it doesn’t look like it’s been apart but I pulled the LH breather plate and Lo and behold the LH flinger plate was set up with an ‘ole over the pin too! Giuseppe was obviously on a roll when he built this one.

I’ll post a pic when I’m not using my phone.

pete roper · « **Reply #49 on:** November 13, 2018, 11:53:38 PM »

Nice to see top quality training and induction processes are high on the agenda at Mandello! (Or wherever the engines are built? Modena maybe?)

More annoying is that the inlet valves are bent too

More expense. Grrrrr.

Pete

Kev m · « **Reply #50 on:** November 14, 2018, 07:30:33 AM »

Quote from: pete roper on November 13, 2018, 11:53:38 PM

Nice to see top quality training and induction processes are high on the agenda at Mandello! (Or wherever the engines are built? Modena maybe?)

More annoying is that the inlet valves are bent too More expense. Grrrrr.

Pete

Is the pin completely missing? Not fallen into the sump, but never there?

ALMOST reminds me of the Harley we bought that was MISSING any intake manifold bolts (or any signs they had ever been there).

It ran a little hot during break-in before we noticed.

pete roper · « **Reply #51 on:** November 14, 2018, 09:59:11 AM »

Nah, you can see the pin through the hole in the flinger plate. It hasn't started to move on this side. Only a matter of time though.

Kev m · « **Reply #52 on:** November 14, 2018, 10:35:28 AM »

Quote from: pete roper on November 14, 2018, 09:59:11 AM

Nah, you can see the pin through the hole in the flinger plate. It hasn't started to move on this side. Only a matter of time though.

Where's the pin at 1 o'clock?

guzzisteve · « **Reply #53 on:** November 14, 2018, 10:55:59 AM »

In the 9 o'clock hole, I use the small holes to cover pin. You can then still see it and use to set cam up.

Kev m · « **Reply #54 on:** November 14, 2018, 11:26:08 AM »

Quote from: guzzisteve on November 14, 2018, 10:55:59 AM

In the 9 o'clock hole, I use the small holes to cover pin. You can then still see it and use to set cam up.

thx

MGrego · « **Reply #55 on:** November 14, 2018, 12:16:28 PM »

So in this case the pin migrated out of the camshaft and into the sprocket, through the improperly aligned hole in the finger plate, thus allowing uncoupling of the timing.

Is it possible for the pin migrate in the other direction, towards the cam lobes ? Surely not ! But I can't remember exactly how it was designed to prevent that ...

Wayne Orwig · « **Reply #56 on:** November 14, 2018, 12:35:54 PM »

Quote from: MGrego on November 14, 2018, 12:16:28 PM

So in this case the pin migrated out of the camshaft and into the sprocket, through the improperly aligned hole in the finger plate, thus allowing uncoupling of the timing.

Is it possible for the pin migrate in the other direction, towards the cam lobes ? Surely not ! But I can't remember exactly how it was designed to prevent that ...

It is a blind hole if I recall, so it can't got deeper.

guzzisteve · « **Reply #57 on:** November 14, 2018, 12:38:07 PM »

Can't go in, cam has a blind hole pin sits in. Oil slinger has the other holes. The fastening bolt is extra long w/blue loctite on it. W/O the pin it's just a matter of time.

MGrego · « **Reply #58 on:** November 14, 2018, 12:46:39 PM »

In this picture I thought I could see the other end of the pin in the camshaft....

Wayne Orwig · « **Reply #59 on:** November 14, 2018, 01:04:34 PM »

It is oddly drilled most of the way through. If you look closely you can see the step on the back side.

Man that thing got rusty sitting in a trash box in the garage for a couple years.

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Author Topic: This should get all the scaredy cats wetting themselves! (Read 10461 times)

beetle

pete roper

pete roper

Wildguzzi.com

pete roper

pete roper

pete roper

pete roper

pete roper