2000 Blaster Engine ?

[flipper]

Just picked up a 2000 Blaster for $350. Guy said it needed a new piston/rings. It was frozen.. Pulled the head and discovered that the piston broken. Cylinder looked pretty good, no gouges or other bad marks. I pulled the engine and started to clean out the bits and piece from within the crank area. The crank now spins freely and the kick started moves it as well.

Now my dilema ! ! Do I flush out the crank area really good and get rid of any remaining debri, or do I split the case and get into it way deeper than I want to?

So... you guys are the seasoned ones... What would you do ???

If I were to clean it out, what do you suggest? I was thinking a good ole' garden hose and then oil it up afterwards...

Thanks,
flipper

 

[scotj77]

truthfully splitting the cases is the best way to be sure it is all leaned out. and some new bearings ta boot

 

[245stroker]

diesel fuel or karosene. Don't use water!!!!!!!!!!!!!!!

 

[Braaaptor]

If you clean it, DO NOT USE WATER! It will cause rust pitting on your main bearings, no matter how much oil you use later.

I've used clean kerosene for similar jobs for years with no problems. Take your engine out of the frame, fill the bottom end up, slosh it around, drain, repeat a couple times.... should do the trick.

Be sure to check the underside of the bottom end for cracks. A piece of broken piston skirt can lodge between the crankshaft and the cases and may break out the bottom of the bottom end. Look around near where the case halves come together under the engine for cracks or breaks.

It is best to split the cases, clean everything 100%, and replace the crankshaft bearings. BUT, you can probably get everything clean enough with just a good flushing to run with no problems.

 

[Budget_Blaster]

If you aint going to split the cases dont even bother doing it throw it in the scrap heap.

Diesel and kerosene will not get it out 100% and it dont take much to wipe a set of bearings or rings out.

A few grains of sand in an engine can wipe the rings out.

And 350 for an engine in need of a rebuild is insane!!!

 

[flipper]

Thanks for the advice.. I am going to do the Deisel fuel method... The bike is in really good shape for a 2000. Original plastic (no cracks), looks like it was never wrecked. So while some think $350 was an insane price.... I can probably part it if all else fails and get my money plus some back....

Will let you know the results.....

Thanks again...

 

[Braaaptor]

$ 350.00 for a complete Blaster is not a bad deal, no matter what part of the country you bought it in. At that price, you can part it out and at least break even if you wind up with more work than you thought.

While its true that a few grains of sand CAN wreck an engine, this happens over time and not all at once. I see failed air filters every week in the shop where I work. Sometimes the whole intake tract is full of dirt. Most all of these engines have suffered premature wear, but they still run and function.

Sand and grit are slow engine killers. As long as there is no radial play in the crankshaft bearings, you have nothing to lose by cleaning things up and running it for awhile. Just keep an eye on the engine and listen for strange noises. You will usually hear a crank bearing that's on the way out before it fails completely.

Somebody on the Forum (Super Noober, I think??) once cleaned out a nasty rusty bottom end and got almost a full season out of a set of previously-rusted bearings before changing them for good measure. Not because they failed.

 

[Awk08]

on the other hand...i split the cases, cleaned everything, replaced the main bearings, but did not do a lower rod brearing/crank rebuild, there must have still been some debri in that bearing, as it had zero up/down play.
that lasted a few months till that bearing went and took a brand new wiseco top end with it
it's full rebuild... mains,crank,seals for me for now on,
or nothing at all

 

[Blaaster]

As an old fart, let me tell you to listen to the guys who say split the cases and rebuild.

There are no prizes for leaving even a grain of old piston in a motor.

No amount of flushing will remove all the debris.