Re: Piston and Valve overhaul for R1100RT

[Rainer Enders <renders@xxxxxxxxx>]

I was worrying about a special coding that if removed will lead to rapid 
degradation as I do not want to do all this again in a few months. There 
was no carbon on the sides and ring grooves and very little on the top 
plateau. The main really hard carbon build-up was in the four corners on 
top of the piston which was difficult to remove as is was hard as a rock.

Rainer
plpklt@xxxxxxx wrote:

>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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