Oil Pressure Loss

[lhanscom]

So I've pulled the engine apart as far as I can with out splitting the cases tonight. I've found at least some of the problems, I won't know all of them until I split the cases. First, one cam journal had a bit of damage, not horrendous, but enough to know that oil pressure was lost, amazingly, only one was visibly damaged. After the head and block are off, I pop off the clutch, the basket seems a bit loose, but not too bad, not sure how solid it should be. The nut was definately on tight. The oil pump gears were fine. I had a couple peices of metal show up under the clutch basket, a peice of copper I think, and a needle bearing. At this point the clutch is out, the block off, and the crank is still stuck. Looking a bit closer, my number 3 connecting rod is not moving on the crank. I dig in, and find that the roller bearings on the connecting rod have all come out, except one, that got jammed between the crank, and the rod. I pulled the last bearing out, and every thing spins free. Albeit with the number 3 rod flopping everywhere. I think that the copper I found was a retainer of some sort, and when it broke, the bearings fell out. Just a guess.

I'll have to split the cases, and look for a crank I guess.

[gspaul]

Best of luck with it Luke!

[earlfor]

Luke, in gen disc there is a topic "NOS parts". I went to that site last night and punched in a search for NOS 1150 parts. I'll look again for sure and see if I can find it, but I believe he had a new 1150 crank.

http://www.andersonvintageparts.com/

On page 5 of the listing for 1985 1150 parts there is this... it was priced at $89.00






New Old Stock (NOS) Crankshaft

For the following models:
GS1100 E GS-1100 E GS 1100 E - Years 1982 1983 Z/D
GS1100 ES GS-1100 ES GS 1100 ES - Years 1984 E
GS1100 G GS-1100 G GS 1100 G - Years 1982 1983 1986 Z/D/G
GS1100 GK GS-1100 GK GS 1100 GK - Years 1982 1983 1984 Z/D/E
GS1150 ES GS-1150 ES GS 1150 ES - Years 1985 F

Part Number: #12250-49201



Earl

[lhanscom]

Luke, in gen disc there is a topic "NOS parts". I went to that site last night and punched in a search for NOS 1150 parts. I'll look again for sure and see if I can find it, but I believe he had a new 1150 crank.

http://www.andersonvintageparts.com/

On page 5 of the listing for 1985 1150 parts there is this... it was priced at $89.00






New Old Stock (NOS) Crankshaft

For the following models:
GS1100 E GS-1100 E GS 1100 E - Years 1982 1983 Z/D
GS1100 ES GS-1100 ES GS 1100 ES - Years 1984 E
GS1100 G GS-1100 G GS 1100 G - Years 1982 1983 1986 Z/D/G
GS1100 GK GS-1100 GK GS 1100 GK - Years 1982 1983 1984 Z/D/E
GS1150 ES GS-1150 ES GS 1150 ES - Years 1985 F

Part Number: #12250-49201



Earl

Hey Earl, I saw that last night, but it didn't seem quite right to me. Aren't the 1100, and 1150 cranks different?

[earlfor]

I know the 1150 and 1100 use different rods due to the different wristpin diameter, but the big end/crank I think must be the same. Tooling and setup to manufacture a crankshaft is costly and I cannot imagine Suzuki not using the same crank that they already made for the 1100 when they came out with the 1150. I know 1980 1100's had a different taper on the stator end, but the crank journals were the same. 1150 was a bore change, not a stroke change, so the crank throws would be the same. I would PM Dink or phone someone such as Murdoch Racing to be sure if you can use that crank. I dont know why not, but then, there are a lot of things I'm not sure about. :-)

Earl

Earl

Hey Earl, I saw that last night, but it didn't seem quite right to me. Aren't the 1100, and 1150 cranks different?[/quote]

[mike J]

I'm sure that the wrist pin dia is different. I think the 1150 had 20mm pins and the 1100 had 18mm. Seems strange that the rod went out and your head was galled as well. Correct me if I'm wrong but aren't the rods just splashed lubricated. The motor wasn't low on oil was it? Mike J

[lhanscom]

I'm almost sure that the wrist pin dia is different. I think the 1150 had 20mm pins and the 1100 had 18mm. IIRC. Mike J

Yeah, that sounds right, I think the primary gears were different too, something about needing the 1100 clutch basket with the 1100 crank.

[Buffalo Breath]

oil

Mains and rods are pressure fed, not splash fed they would only last about 1,000 miles if splash fed due to the lack of slots on the big end on the rods, you can do it on a two stroke because the fuel mixture is compressed in the crank case. and is a very fine mist

[earlfor]

Re: oil

That makes sense one way and then again, it doesnt. Why would you make two versions of the same basic engine and make one with oiling slots and one without?

Earl

Mains and rods are pressure fed, not splash fed they would only last about 1,000 miles if splash fed due to the lack of slots on the big end on the rods, you can do it on a two stroke because the fuel mixture is compressed in the crank case. and is a very fine mist

[mike J]

Re: oil

Mains and rods are pressure fed, not splash fed they would only last about 1,000 miles if splash fed due to the lack of slots on the big end on the rods, you can do it on a two stroke because the fuel mixture is compressed in the crank case. and is a very fine mist

Well not 100% here but I don't think the rods or the mains are pressure fed. If so you would have oil holes in the bearing races to feed it. I know that any plain bearing crank has to be pressure fed but not a roller bearing one. I have a set of GS1150 cases in my shop, I will check tonight when I get in. Mike J