Boroscoping
 

Since I´ve had some sooty exhaust pipes (only on passenger side, bank-1), I thought I´d check the cylinders out just to see if there might be any scoring.
I have no excessive ticking noice, or oil consumption so I´m not too worried, however, why not take a peek inside?

So, I have two basic questions:

1) What is the recommended routine? If I start by simply looking down the spark plug holes, some of the cylinders might be in bottom position and other in top position, should I manually crank the engine (via the front hatch) to get each cylinder in position for scoping? I´ve seen Jake scope via the sump to see the backside, I guess this is next level..

2) Anyone have a personal experience of what scope to buy? There are a lot out there... :-)

Cranking the engine from the crankshaft in front would work. Just be sure to crank it clockwise (NEVER turn it counter clockwise). Jake looks up from the sump because it gives you a view of the bottom half of the cylinder, which is where the wear will begin and work its way up the cylinder. For your experiment, looking down the cylinder from the spark plug should be good.

How old is your AOS? When they start to go, they allow oil to enter the combustion chamber that eventually comes out the exhaust causing a sooty tailpipe. There's a better chance of you having a bad AOS than bore scoring.

[QUOTE=husker boxster; Jake looks up from the sump because it gives you a view of the bottom half of the cylinder, which is where the wear will begin and work its way up the cylinder. [/QUOTE]

Yes, this is the most accurate way to determine cylinder scoring, but is not as easy as it sounds as you will have to 'snake the boroscope' from the sump into the bottom of the cylinders..

Thanks boys!

Hey husker, dumb question but here it goes. I've read to be er turn the crank counterclockwise but why? I know that the engine doesn't actually turn this way but are there components that will be damaged if it is done with ignition off and out of gear?

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Post 11 explains it well.

http://986forum.com/forums/performance-technical-chat/76251-ran-into-problems-replacing-camshafts-after-pad-replacement.html