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cylinder specs

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NIL8er

NIL8er

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having trouble getting anyone in western NC to work on my 96 seadoo Bomb. GTX motor.
So im doing what i can myself.
the question is: are there any special considerations when honing the cylinders for this motor. AND could a typical automotive machine shop correctly measure and inspect these cylinders for continuity , checking for subtle gouging and such done by a bent rod. I cannot see any obvious uneven wear but they need to be checked . Rod is bent Pistons and rings look ok but would definitely replace rings, and need to know if cylinders and or pistons need replacing or serviced. any professional advice or suggestions welcome. Thanks
 
so you had a bent rod? That seems pretty serious, how did that happen? As far as the cylinders, you can slide the pistons in without the rings and see how it feels. Just looking at them up to the light can tell you something. The Seadoo manual says you can take a feeler gauge and run it around the perimeter of the piston, it should measure a certain range (its in the manual). As far as gouges, just try and feel for them with your fingers. For honing, buy a hone, they are cheap or do what I did, sand them with 400 grit in a cross hatch pattern. I just did a rebuild on a 587 over the winter and used these techniques. Motor is running great. Don't over think this.
 
thanks pretty standard protocol then. Didnt know if there was anything different for these motors. i dont have any experience with marine engines.
 
bent rod prob from hydro/oil lock and starting with too much oil in cylinder above the rings. Since no water in motor i assume oil seeped in over storage and PO attempted to start it with this phenomenon present. Which brings up a question ive seen addressed here before why is excessive amount of MOTOR oil in combustion chamber. ive Read worn seals on crankshaft???
 
The inner crank seals leak oil from the rotary valve chamber when the y get old and fill the cylinders with oil.

You are already installing a new crank in an old ski. If it were me I would send the cylinders to FullBore or Group K for a fresh topend by a shop that knows what they are doing, especially chamfering the ports and have a 100% fresh engine.
 
reassembling crank case

so i was just told i cant reassemble the crank case, it has to be done in the factory??? gseadoo mechanic said if not done in factory then it wont be sealed correctly and wont create a vacuume as it needs for fuel intake???? anyone chime in on this who has experience with bottomend reassembly.
 
i was just told crank cases cant be correctly sealed by anyone except the factory??? any one heard of this.
 
do you have to freeze the case first or certain sealant. came apart easily without any sealant ??
 
I am not sure who you are getting your information from but they do not know what they are talking about.
A rebuilt crank is $275 plus shipping for one from SBT out of florida but their shipping can be ridiculous. A rebuilt one from Seadoo is about $400 and most dealers like Pro Caliber offer free shipping on orders over $99. I only use ones from seadoo.

Ts seal the cases use Threebond 1194, Honda Bond 4, Yamabond or Permatex MotoSeal, they are all the same thing.
 
would there be any reason to do anything but hone the cylinders if there not damaged at all. just new pistons rings and inspect Raves...............................i guess it is a a dumb question, if crank is bad then prob alot of hours which will call for cylinder bore at least! NO?
 
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Either this thread or the old one like I said the person telling you this is full of crap.
It is done all the time here, at seadoo dealers and independent shops. I have done a lot as have others here. There is nothing special to it other than clean it good and use the proper sealant.

You can download the factory seadoo service manual for your model and year and it will tell you step by step how to do it. It is very easy.
 
thanks again ill delete his thread. ok ive got a hit out on this thread. its as good as dead
 
That is correct, the only way to know if the cylinder can be just honed is to have a machine shop measure it for size and out of round. The seadoo manuals give all the specs. If it is within spec a quick hone with a ball hone and new rings is all that is necessary.
 
You may realize if you spend some more time here it is a very helpful forum. Starting multiple threads in forum on your engine will not yield good results.

This forum is not like your standard automotive forum where everyone argues and bickers.

Telling us to relax is not how we communicate here.


Rob


NIL8er said:
Not worried . but thanks... new question new thread. relax.
Click to expand...
 
1983 said:
You may realize if you spend some more time here it is a very helpful forum. Starting multiple threads in forum on your engine will not yield good results.

This forum is not like your standard automotive forum where everyone argues and bickers.

Telling us to relax is not how we communicate here.


Rob
Click to expand...

dont tell grown men not to worry , its a bit condescending. if you want to communicate with me without a problem then be cool.
 
I never had a problem. You do. It's the Internet. How did you know I was being condescending?


Rob
 
If everyone is cool with it, I would like to merge the two threads because I think they are the same question albeit the other one started as honing cylinders but progressed into sealing crank cases. I'll let this fester until tomorrow some time and if no one complains about the merge I'll do it. Just keep it cordial guys we're all here to help each other and preserve our passion.


Now to lighten the mood....................

tumblr_m1itsg87X61rn95k2o1_500.jpg
 
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