Author Topic: My engine sounds like a sea shell. (Read 8950 times)

Stusmoke · « **on:** June 14, 2012, 10:21:11 AM »

Okay so its been getting worse. You know that sssssshhhhhhh noise you hear when you stick a sea shell to your ear? thats what it sounds like. A bloody ocean in my engine. Its been happening for a while but its been getting louder and louder.

To eliminate all confusion here, I mean a figurative ocean, theres no water. I heard this come up on another thread but I couldn't find it so I had to start another. Sorry. Whats everyones opinion? Time for a top end?

msmola2002 · « **Reply #1 on:** June 14, 2012, 12:40:19 PM »

I'd guess crank bearings are shot.

But you said it had 200h on the top end anyway? You are lucky the thing has not had a piston collapse anyways. Yeah 2 strokes have less moving parts but they still need bits replaced from time to time.

msmola2002 · « **Reply #2 on:** June 14, 2012, 12:53:24 PM »

And I am no rocket surgeon, but maybe there is a cause and effect thing here. Filter oil is not really oil - more of a glue that does not set.

Quote

I'll have to get some. I'm rubbing engine oil on mine and its pain in the neck. I'll add it to my shopping cart.

Stusmoke · « **Reply #3 on:** June 14, 2012, 01:01:34 PM »

Yeah this engine has been going like a house on fire for a long time. I guess I'll have to split the cases. Thanks mate. It would have to be getting close to 200 hours I'd think

2T Institute · « **Reply #4 on:** June 14, 2012, 01:02:42 PM »

Quote from: Stusmoke on June 14, 2012, 05:21:11 PM

Okay so its been getting worse. You know that sssssshhhhhhh noise you hear when you stick a sea shell to your ear? thats what it sounds like. A bloody ocean in my engine. Its been happening for a while but its been getting louder and louder.

How far from the ocean are you, just eliminating possiblities.

scotty dog · « **Reply #5 on:** June 14, 2012, 01:06:47 PM »

I think msmola might be right Stu, IF it has 200 hours on the engine you might be replacing alot more than bearings, you will wanna get ya cylinder measured up too coz a 200 hr old piston woulda been hammering around in there like a cock in a sock, im thinkin a complete engine might be in order mate, cylinder and all...

and if you think it goes now, wait till its all fresh

Stusmoke · « **Reply #6 on:** June 14, 2012, 01:32:00 PM »

I probably wont have the money to do all that. The engine has got alot of hours on it though, this I know for certain. I do want to keep cost to a minimum if I can. I'll take the cylinder off tomorrow take a look. I'll need to buy feeler gauges proper, good quality tools, bearing pullers etc before I start cracking cases though. We'll see how we go. I'll take a look at the cylinder, piston and take some picks. Post it up here just for fun.

Quote from: 2T Institute on June 14, 2012, 08:02:42 PM

Quote from: Stusmoke on June 14, 2012, 05:21:11 PM
Okay so its been getting worse. You know that sssssshhhhhhh noise you hear when you stick a sea shell to your ear? thats what it sounds like. A bloody ocean in my engine. Its been happening for a while but its been getting louder and louder.

How far from the ocean are you, just eliminating possiblities.

About 4 hours drive... I considered going to sleep to the sound of my bike running, the beautiful crashing waves

SachsGS · « **Reply #7 on:** June 14, 2012, 03:03:10 PM »

Nothing like a little "Dry" humour!

Crank bearings X2.I once worked on a YZ250 where the crank bearings seized and spun in the cases,not fun.

msmola2002 · « **Reply #8 on:** June 14, 2012, 10:09:36 PM »

Another possibility - did you have your wash plug in? could be water in the pipe. THat's very aquatic

scotty dog · « **Reply #9 on:** June 14, 2012, 11:58:41 PM »

Quote from: msmola2002 on June 15, 2012, 05:09:36 AM

Another possibility - did you have your wash plug in? could be water in the pipe. THat's very aquatic

You will be able to tell visually, at the top of the cylinder where the ring stops there might be a lip a couple of mil down from the very top, and also at the bottom, if the piston has been slopping around, you will see marks where the piston stops, and you will be able to feel that too. obviosly look for scoures and any chrome comin off.
Hope its all good for your sake Stu

Stusmoke · « **Reply #10 on:** June 15, 2012, 12:20:00 AM »

Quote from: SachsGS on June 14, 2012, 10:03:10 PM

Nothing like a little "Dry" humour!

A little piece of me just died...

Quote from: msmola2002 on June 15, 2012, 05:09:36 AM

Another possibility - did you have your wash plug in? could be water in the pipe. THat's very aquatic

You guys are jerks

Stusmoke · « **Reply #11 on:** June 15, 2012, 04:16:10 AM »

Okay, let the overhaul begin. I'm going to throw whatever is ABSOLUTELY NECESSARY into my baby. I need to buy tools first and if someone could list out the tools that I'll need I'd be greatful. I might aswell get all the tools I'll need for whatever needs doing to keep the bike going. It doesn't need to have top notch components in there, it doesn't need to be operating at 100% capacity, it just needs to run without the danger of grenading and causing much greater damage. Again keeping cost to a bare minimum is essential here. I don't have the money to buy top notch tools and If I can split the cases without a full on case splitter that would be awesome. Just to clarify... How loud should a ssssshhhh noise be? I figure its normal to have noise coming from an engine considering its revolving at around 1 grand (idle). Oh and theres that thing with small explosions 1000 times a minute. Thanks guys

Stusmoke · « **Reply #12 on:** June 17, 2012, 08:05:00 AM »

*bump* I'm gonna do a full rebuild including my top end. What are the tools necessary for this operation? I'm probably gonna need a case splitter right? If someone could please list all the tools I'll need for a FULL engine rebuild I'd really appreciate it. and note i said NEED. Absolutely NEED.

Also, what steps should I take to ascertain that it is most DEFINITELY in need of this and the shsssshshhhhh noise is a result of a tired engine? Which for the record, based on the condition I found the front forks in, I doubt has been taken care of well. If at all.

I know I'm being annoying and I'm sorry for that but I need to know, need to do it and get back to riding

scotty dog · « **Reply #13 on:** June 17, 2012, 11:45:46 AM »

You will need a flywheel puller. maybe a case splitter, some do come apart by tapping with a rubber or nylon mallet.
If you have a bike shop close, some will remove ya flywheel and split ya case for 10-20 bucks.
Putting back together you might need a crank puller, which pulls the crank through the bearing if you put the bearing in the case first.
I have seen it done here by dogger, i think in his 2001 CR 250 engine build thread or somewhere else, not sure.
Have you googled how to do it? Surely theres a step by step vid or something out there in the www

Stusmoke · « **Reply #14 on:** June 17, 2012, 12:02:39 PM »

I've got my manual. It tells me I'll need a case splitter. Just thought it might have been being pedantic. My bike shop would probably charge $100 for it. And besides, I'll need to do this stuff next year sooner or later so I might as well get the tools now. Case splitters are usually pretty universal right? So far my list is at a flywheel puller, torque wrench, case splitter to split my cases. Will I need specialized bearing/seal pullers for the crankshaft and a little something special to take the clutch out? Also, is there a good site to order these tools off? Or just places like motosport, rockymountain deniskirk etc?

Cheers guys

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Author Topic: My engine sounds like a sea shell. (Read 8950 times)