Re: Piston and Valve overhaul for R1100RT

[plpklt@xxxxxxx]

If the scratches don't form a weak spot then I wouldn't worry about it,   The rough spot will attact carbon again so you might want to take a green pad and just clean it up a little.   I even wire brushed the tops of pistons with no problems,  Just dont take any significant material off.  New pistons don't have that perfect of finish on them to begin with.
 
was there any carbon in the ring grooves?  that should be clean and free of damage.  
 
paige 
 
 
- -----Original Message-----
From: renders@xxxxxxxxx
To: oilheads@xxxxxxxxx
Sent: Mon, 25 Sep 2006 8:27 PM
Subject: Re: Piston and Valve overhaul for R1100RT


On the top in the higher middle area I only used a nail brush. In the top lower four corners where the carbon is really hard I used a screwdriver to losen the stuff. That's were some minor scratches are. Do they matter at all? Where do I find someone who can do the bead blast? 
 
Thanks, 
Rainer 
PGK75S@xxxxxxx wrote: 
 
>In a message dated 9/24/06 6:48:07 PM Eastern Daylight Time, >renders@xxxxxxxxx writes: 
> 
><< A few weeks ago I lost a lof of oil while driving on the road due to the >oil level inspection window falling out. I decided to open up the Engine and do >a complete overhaul of the engine. Now I have taken the engine apart and I >need some advice regarding diagnostics for the pistons and valves. I have >removed the carbon from the piston and I am wondering if I should replace the piston >as the piston top surface got slightly scratched. Does this matter at all? >The scratches are very minor but you can see some shiny Aluminium in the >scratches. Should I have the pistons inspected or just replace them with new ones or >don't worry? Or can you sand the piston? >> 
> 
> 
>What did you scrape the carbon with? If they're only minor scratches I'd >tape up the pistons and have the tops bead blasted. DO NOT bead the ring >grooves, it affects ring-seal and not in a good way. 
> 
>Cheers 
>Paul 
>NJ 
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