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Observations on a high mileage engine tear down (Read 1391 times)
LANCER
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Re: Observations on a high mileage engine tear dow
Reply #75 - 10/12/16 at 17:03:13
 
If that is the "Original type Easy-Off" be careful, it will eat aluminum.
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Re: Observations on a high mileage engine tear dow
Reply #76 - 10/12/16 at 19:22:50
 
You might try aircraft stripper ,it takes the clear coat off the engine side covers! won't damage alum.I think NAPA sells it.
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Re: Observations on a high mileage engine tear dow
Reply #77 - 10/12/16 at 21:12:56
 
Easy Koff

Gag me.


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Re: Observations on a high mileage engine tear dow
Reply #78 - 10/17/16 at 11:00:57
 
The cylinder gasket mess is finally done.  I stuck with the CRC Gasket Remover.  Spray, soak, soak, soak, scrape, scrape, scrape, scrape.
Used a box cutter blade and single edge razor blade for the scraping.
It was like scraping on ROCK... literally.  I was scraping it off in a fine poweder.
Finally got it thin enough to pop it loose from the metal.. a very little bit at a time.
Never did try the heat method.  May have gone faster.  May have made it worse.

See the results in the gallery.
http://imgur.com/a/RhTYO

Also some pics of the cleaned up piston.  Thanks to Berryman dip for those results.

Now, for the question of week.  The sight glass on the clutch cover had a tan "gasket" (for lack of a better word) around it.  See the pics.  It was pretty much disintegrated.  Do I RTV around the glass, or just leave it alone?
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Re: Observations on a high mileage engine tear dow
Reply #79 - 10/18/16 at 04:06:05
 
The little gasket on mine had disintegrated on an engine with only 1,200 miles on it, and it was peeling off.  I just removed it, and you could seal it with the same stuff that you are going to use on the head cover (Suzukibond).
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Re: Observations on a high mileage engine tear dow
Reply #80 - 10/18/16 at 04:14:17
 
It was like scraping on ROCK... literally.  I was scraping it off in a fine poweder..

Daaang,, that sounds like a serious not fun kinda deal.
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Re: Observations on a high mileage engine tear dow
Reply #81 - 10/18/16 at 07:57:23
 
Dave wrote on 10/18/16 at 04:06:05:
The little gasket on mine had disintegrated on an engine with only 1,200 miles on it, and it was peeling off.  I just removed it, and you could seal it with the same stuff that you are going to use on the head cover (Suzukibond).


I poured some 3 in 1 sewing machine oil in the groove.  If it doesn't leak until I am ready to put the clutch cover on, I won't bother with any additional sealant.  The tan piece was obviousely doing nothing before.
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Most motorcycle problems are caused by the nut between the seat and the handlebars. Make sure yours isn't too tight or too loose.
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Re: Observations on a high mileage engine tear dow
Reply #82 - 10/18/16 at 08:00:39
 
justin_o_guy2 wrote on 10/18/16 at 04:14:17:
It was like scraping on ROCK... literally.  I was scraping it off in a fine poweder..

Daaang,, that sounds like a serious not fun kinda deal.


Very much not fun.  Took about a week.  
I am going to use a VERY thin (almost non existent) coat of Permatex Ultra Grey on the base gasket when I put it back together.
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2002 - Silver (Thumper)
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Most motorcycle problems are caused by the nut between the seat and the handlebars. Make sure yours isn't too tight or too loose.
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Re: Observations on a high mileage engine tear dow
Reply #83 - 10/18/16 at 13:48:29
 
I don't blame you! I mean, you don't wanna hafta go through THAT again in 155,000 miles..
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Re: Observations on a high mileage engine tear dow
Reply #84 - 10/25/16 at 03:28:25
 
The report is in from Lancer on the cylinder head and valves.
As I suspected, the valves have a few.. issues.  Roll Eyes

New pictures in the gallery: http://imgur.com/a/RhTYO

And narrative from Lancer (I hope I have them in the right order)
1. #2 exhaust valve with 2 distinct cracks developing on the top edge.
2. Intake valves looked decent on the back side but had a few minute cracks developing on the face.
3. Deep wear grooves on the exhaust valves.
4. A closer look at the deep groove in the exhaust valve.
5. Face of intake valve showing a distinct crack on the top edge.
6. Intake valves, no groove on the contact surface.

And a direct quote: "Anyway, the basics are that the valves themselves are trashed, with cracks on the face openly visible, and with very deep wear grooves on the back side of the exhausts.  
The springs are just barely inside the spec's, as are the valve guides.
All of them need to be replaced."

Happy happy joy joy..   Sad       Grin

So, my original suspicion appears to be correct.
"1. Using too much oil (compression isn't horrible though.  Suspect valve seals)"
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2002 - Silver (Thumper)
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Most motorcycle problems are caused by the nut between the seat and the handlebars. Make sure yours isn't too tight or too loose.
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Re: Observations on a high mileage engine tear dow
Reply #85 - 10/25/16 at 04:11:22
 
The cylinder is still straight and round, IDK about the ring grooves and lands, but you got your nickels worth outta the valves,guides and springs.

Will the seats be replaced?
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Re: Observations on a high mileage engine tear dow
Reply #86 - 10/25/16 at 04:29:36
 
I don't know if the valve seats are beyond saving, I leave that to a machinist to make that call.
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Re: Observations on a high mileage engine tear dow
Reply #87 - 10/25/16 at 04:35:51
 
youzguyz wrote on 10/18/16 at 08:00:39:
justin_o_guy2 wrote on 10/18/16 at 04:14:17:
It was like scraping on ROCK... literally.  I was scraping it off in a fine poweder..

Daaang,, that sounds like a serious not fun kinda deal.


Very much not fun.  Took about a week.  
I am going to use a VERY thin (almost non existent) coat of Permatex Ultra Grey on the base gasket when I put it back together.



I don't know how important that gaskets thickness is in the engine. Gosh, that Could slightly increase compression.
Retard cam timing a hair,
I'm sure curious about the Armen cam timing setup..
Wanna see how it works out.

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Re: Observations on a high mileage engine tear dow
Reply #88 - 10/25/16 at 04:42:30
 
I seriously doubt that the valve seats will need to be replaced.  On the head I took to Bill Moeller at Bore Tech, he freshened up the seats and said they were really hard....he had to use stones to cut them as his seat cutter wouldn't touch them.  There is plenty of material in the seat for them to be ground to provide a new seating surface.

The valves however are another story.  They are made very thin and light on a modern engine, and they need to be replaced when they become worn....they cannot be reground.

 
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Re: Observations on a high mileage engine tear dow
Reply #89 - 10/25/16 at 05:48:07
 
justin_o_guy2 wrote on 10/25/16 at 04:11:22:
The cylinder is still straight and round, IDK about the ring grooves and lands, but you got your nickels worth outta the valves,guides and springs.

Will the seats be replaced?


Ring grooves are well within spec.  The piston is fine in all respects.  New rings installed on the piston and look OK.
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Most motorcycle problems are caused by the nut between the seat and the handlebars. Make sure yours isn't too tight or too loose.
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