GR650 terrible metalic engine noise

[jorgeno]

My summer prosjekt escalates. Look at the piston rod (small metal washer) What is it? It is only on the right side. According to the parts manual it should not be a washer there.. Found some parts of it in oil pan. Any ideas?

 

[JEEPRUSTY]

IS that a shim of some sort?

 

[JEEPRUSTY]

It looks like a shim that is in the process of getting hammered out..

 

[JEEPRUSTY]

#9 on the fiche assuming this is the gr 650

 

[jorgeno]

Hi. Thanks for the quick reply. Yes it is a GR650. Do you think it might be #9? The thrust bearing? Maybe, it's just so broken that I thought it was something else. But really logical

 

[JEEPRUSTY]

Some of the machinist types on here can confirm but I think its a shim
They come in varying degrees of thickness.

nasty business.

 

[JEEPRUSTY]

crikey an online manual exists!!

It is in french though.......

It would have application specific information on the parts you are looking at though.
http://suzukigr650.free.fr/Documentations/index_doc.php?page=Manuel_entretien

 

[TeamDar]

Thrust bearings are used on the main bearings not the rod bearings of plain bearing cranks.

 

[Toasty]

What are we looking at here? I don't see a metal washer

 

[JEEPRUSTY]

It looks more like feeler gauges coming out in a spoke pattern.
A bit hard to see.
Could a con rod bearing melt and come out like that?

As noted by a prev poster there is no shim or spacer per the manual.
Technical french is hell but the pictures are clear

 

[Guest]

Rod bearing.


and, Wow.

Keep going, pull the crank out and the rod, see what it looks like. They might be salvageable but its not looking good.

 

[bbjumper]

Nothing worse than loud expensive noises, sorry dude but looks like you may be lookin for a parts bike or this is gonna be a great self tutorial in engine overhaul. Look at it this way, at least you'll know exactly what you have when done.

 

[jorgeno]

Bad bearing

Bad bearing

Finaly! Got the engine apart. As you all can see is the bearing totally destroyed. I see some scratches on the rod and on the crank, so I wonder do I have to replace these too? Or will it be fine just to replace the bearings?

 

[Guest]

Hey Jorgeno, Welcome to the GR650 engine rebuild club! Like you, I had a loud engine noise that caused me to open up an engine for the first time to see what was going on. My problem was that a nut on a connecting rod had come loose and the rod bearing and the crankshaft had gotten damaged. So, I'm thinking at least my first engine rebuild will be a 2 cylinder and not a 4 cylinder engine. Should be a lot easier, right? Well...

I had no problem finding most everything but for the crank bearings. Found them in the Netherlands, close to you. Here's the online link:

http://www.classicsuzukiparts.nl/

Anyway, I bought a used crankshaft, all the accompanying gaskets, bearings, etc. Started to finally do the rebuild last week when I got pretty sick so I've had to put it off for a while. I hope to get started again in a couple of days. It's my first engine rebuild, but if I can be of any help, let me know.

If you've never rebuilt an engine before, my first piece of advice is to read the service manual several times over. They're not perfect for a beginner and little things that are commonly known by experienced engine rebuilders can some times be left out. But they can be figured out if you add a little common sense to what you're doing.

 

[jorgeno]

Thanks for the good welcome in the GR rebuild club and the advice, super I didn't know about that website in Netherlands. It will be handy.
It's my first engine rebuild too. I didn't think it would be so much work to fix the GR when I first bought it, the seller said it was just missing the starter. But it was more...
The easiest thing to do would be to buy a new engine, but I'm to stubborn to take shortcut and it's fun to wrench on the bike. Hopefully it will come back to life one day. I'm in no hurry. I have my GS to drive in everyday use. But it's good to know that I can ask you if there is some trouble on my GR.
Sorry to hear about your health, hope you get well soon.

 

[Guest]

Thanks Jorgeno. getting a little better everyday. The seller of my GR said it.. "had a little ticking noise at the top of the engine".. which I took meant a little valve adjustment. It looked near mint and had only 12,000n miles on her so it sounded reasonable. So I did A LOT of maintenance work on it first before I had her up and running. Then, when it did finally run, a LOUD knocking, and the rest is history.

The lesson learned is two fold: 1) Don't always trust the previous owner unless you know them. And 2) Make sure the engine runs before you do too much extra work on a bike.

Anyway, if I can help, let me know.

 

[eil]

1) Never trust the previous owner unless you know them.

Fixed that for you.

 

[Guest]

Thanks, eil. I guess sometimes, when I see a nice bike I like a lot, I just give people the benefit of the doubt that they're as honest as I am. It's worked before...until this one.

 

[rustybronco]

There used to be places around who would hard chrome crank journals and regrind them to size. Although it's probably easier now-a-days to find a used crank and rods and slap them in.

 

[Guest]

Looks like oil starvation.