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Bore scoring
https://forums.tipec.net/viewtopic.php?f=8&t=17398		 Page 1 of 1
Author:  Hurricane1500 [ Tue Apr 01, 2014 12:25 pm ]
Post subject:  Bore scoring
Hi quick question


If I have good compression in my engine could I still have bore scoring

Have an issue with oil consumption


Thanks
Author:  JasonGibson [ Tue Apr 01, 2014 12:30 pm ]
Post subject:  Re: Bore scoring
got any details of what car it is ?

Amount of oil used and what grade of oil used
Author:  Paul Mabley [ Tue Apr 01, 2014 12:49 pm ]
Post subject:  Re: Bore scoring
My 996 had a ferocious apetite for oil, I did 80,000 miles in it without issue whilst this was going on (1l every 1000 miles or less) but this was well within tolerance. My 997 was slightly better at 1500 miles, may be the way they were driven :lol:

I changed to thicker Mobil oil in the 996 it made a slight difference but not massive.

The air oil separator is a good place to start if smoking a bit. I did two DIY, awful 8 hour job but part relatively cheap at £60, they drop the engine in the workshops but charge a good amount for it!
Author:  Hurricane1500 [ Tue Apr 01, 2014 2:43 pm ]
Post subject:  Re: Bore scoring
Cars a 2003 996 with about 70k on the clock

Using about 1Lt per 600 to 800 miles

sometimes smells a bit of burnt oil

Currently filled with 5-30 liqui moly but oil consumpsion was just as high with mobile 1

had the compresion checked all ok
Author:  Paul Mabley [ Tue Apr 01, 2014 3:00 pm ]
Post subject:  Re: Bore scoring
You should be OK for bore scoring then, check out the air oil separator.

Info here:

http://www.pelicanparts.com/techarticle ... arator.htm
Author:  Brett928S2 [ Tue Apr 01, 2014 9:18 pm ]
Post subject:  Re: Bore scoring
Hi :)

I have one of these on my 928 >>> http://m.diytrade.com/m4/pd/10892663/Pr ... 70550.html

Its an EXTERNAL seperator...and works VERY VERY well.... my Nitrous system creates extreme oil blowback and this almost cured it...and no stripping down the engine...30 min job to fit, assuming you can get access to an oil breather pipe...

All the best Brett :)
Author:  R_D_Olivaw [ Tue Apr 01, 2014 10:39 pm ]
Post subject:  Re: Bore scoring
I had a similar issue on my 968, and thought the same, but it turned out to be worn piston rings. For me the problem started after a top end rebuild following a head gasket failure.
Author:  Paul Mabley [ Wed Apr 02, 2014 7:39 am ]
Post subject:  Re: Bore scoring
R_D_Olivaw wrote:
I had a similar issue on my 968, and thought the same, but it turned out to be worn piston rings. For me the problem started after a top end rebuild following a head gasket failure.


Shouldn't be, he said he has good compression.
Author:  R_D_Olivaw [ Wed Apr 02, 2014 8:11 pm ]
Post subject:  Re: Bore scoring
Mine had good compression too when first tested, but it was explained to me that you can get leakage over time. When checked later they found air getting past thecylinders.

Maybe worth double checking.
Author:  Rob996 [ Wed Apr 02, 2014 8:31 pm ]
Post subject:  Re: Bore scoring
Hurricane1500 wrote:
sometimes smells a bit of burnt oil


Could the burnt oil smell be a small leak cooking on the engine somewhere? - I know mine suffers from that! (and then there are the random smells you get when it is damp and the exhaust cooks whatever gets thrown at it!)
Author:  Paul Mabley [ Thu Apr 03, 2014 7:38 am ]
Post subject:  Re: Bore scoring
The car will smell a bit like that after a good run

Quote:
Mine had good compression too when first tested, but it was explained to me that you can get leakage over time. When checked later they found air getting past thecylinders.

Maybe worth double checking.


Fair enough, I didn't realise that was a possibility, may be worth doing some more tests over a period of time to assess any trends.
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