Removing cylinder gasket

S

sothere

Guest

• May 7, 2009

• #1

I recently saw a thread about removing the gasket and wonder about checking squish before and after.
If this is easy enough I may try it on a 651 Solo,455 Husq. or a 310 Stihl.
Any advice?

 

Magnus

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• May 7, 2009

• #2

It is smart to take it easy after any surgery...

Turn by hand, turn slow with starter, turn normally...

 

woodworkingboy

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• May 7, 2009

• #3

Soft small diameter electrical solder on four points on the outside edge of the piston crown, held by grease, or through the plug hole.

 

Magnus

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• May 7, 2009

• #4

Most saws have enough clearance as gaskets usually are very thin these day's.

You really put balls of solder in the saw to see if it turns over?

 

Magnus

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• May 7, 2009

• #5

How do you get it out knowing nothing is left?

 

lumberjack

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• May 7, 2009

• #6

No, you squish the solder (soft metal) and measure the clearance with a mic or caliper.

 

sotc

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• May 7, 2009

• #7

He puts it on the piston with a dab of grease to hold it in place. Then bolts cylinder down, tuns engine over and removes cylinder again to measure

 

woodworkingboy

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• May 7, 2009

• #8

sotc said:

He puts it on the piston with a dab of grease to hold it in place. Then bolts cylinder down, tuns engine over and removes cylinder again to measure

Click to expand...

Take off the ring(s), you don't need them to check clearance. Makes for easier cylinder on and off.

 

S

sothere

Guest

• May 7, 2009

• Thread Starter Thread Starter
• #9

So which of the 3 should I do,I have the most money in the 455 but it has a de-comp valve which might be benificial after surgery

 

Magnus

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• May 8, 2009

• #10

I can see this being a good thing if you build a saw for performance and need to calculate the volumes before and after compression.

But to see if it is clear or not on a saw for toy, this is way to complicating....

KISS! I tell myself this every morning (after I cussed a bit over how tiny space there is).

Keep
It
Simple
Stupid

 

Al Smith

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• May 8, 2009

• #11

Like I said in another thread ,removing the gasket should decrease the clearance by about 18 thou on a Stihl .This is figuring 20 thou for the gasket and adding about 2 thou for sealant .

What it will do is increase the comp ratio but likely decrease the top speed because the exhaust is ported a tad late . It should raise the torque a tad bit though .

One thing about it ,by just removing the gasket you can't really screw anything up .If it doesn't work out just stick the gasket back in .