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whats the clean spots from? 

 

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ausedwagon
 Post subject: whats the clean spots from?
Posted: Fri Jul 13, 2012 3:46 pm 
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after pulling the head off the ed after it stopped some of the pistons have clean spots, any ideas?

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TROYMAN
 Post subject: Re: whats the clean spots from?
Posted: Fri Jul 13, 2012 4:26 pm 
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usually from water entering the combustion chamber..... although my old ed engine was clean around the whole outer edge of the pistons but mine was burning huge amounts of oil..
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Dazmonster
 Post subject: Re: whats the clean spots from?
Posted: Fri Jul 13, 2012 7:46 pm 
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Yeh Id agree. I reckon its from water, washing (turning to steam) the piston crowns clean. Was it missing ?.. Regards Darren.
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EFFUTURA4.05SP
 Post subject: Re: whats the clean spots from?
Posted: Fri Jul 13, 2012 8:10 pm 
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How many kms does your engine have? My 370,000km and 270,000km engines were both alot cleaner than that.

Might want to run some Nulon upper engine cleaner through it once its going again..

Apologies for the random comment.

 

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Pakrat
 Post subject: Re: whats the clean spots from?
Posted: Fri Jul 13, 2012 11:44 pm 
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Looking at the pots you have worse troubles then clean spots.
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ausedwagon
 Post subject: Re: whats the clean spots from?
Posted: Sat Jul 14, 2012 12:43 am 
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Yeah the motors knackered. The aux gear has gone

 

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eaton M112 supercharger, lowered a tad, extractors, 2.5" exhaust, T5 , custom SureCam supercharger cam, 3.45 lokka, 2 piece tailshaft, poyair bags in the back, TSS front Skirt, Sprint skirts, XR wagon spoiler.
soon to get: AU diff, upc 330mm brakes, Vapor LPG injection.
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bry40l
 Post subject: Re: whats the clean spots from?
Posted: Sat Jul 14, 2012 2:09 am 
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Pakrat wrote:
Looking at the pots you have worse troubles then clean spots.

Thats what I thought.

 

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cjh
 Post subject: Re: whats the clean spots from?
Posted: Sat Jul 14, 2012 3:06 pm 
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Here's a pic of some clean pistons........ 8-)

 

 

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EFFUTURA4.05SP
 Post subject: Re: whats the clean spots from?
Posted: Sat Jul 14, 2012 4:29 pm 
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cjh wrote:
Here's a pic of some clean pistons........ 8-)

Thats one shiny heater pipe :shock:

 

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1996 EF Futura factory manual
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cjh
 Post subject: Re: whats the clean spots from?
Posted: Sat Jul 14, 2012 4:38 pm 
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EFFUTURA4.05SP wrote:
cjh wrote:
Here's a pic of some clean pistons........ 8-)

Thats one shiny heater pipe :shock:


and it currently doesn't leak, either........ :mrgreen:

 

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EFFUTURA4.05SP
 Post subject: Re: whats the clean spots from?
Posted: Sat Jul 14, 2012 6:53 pm 
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cjh wrote:
EFFUTURA4.05SP wrote:
cjh wrote:
Here's a pic of some clean pistons........ 8-)

Thats one shiny heater pipe :shock:


and it currently doesn't leak, either........ :mrgreen:


Is it just a polished factory one? Looks good.

 

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1996 EF Futura factory manual
Fully rebuilt engine,Decked, Honed, Bored, Tolerences spot on, Wade 1673, Extractors, 2.5" zorst, 3" CAI, High flow filter, Exedy sports tuff clutch, Chiptorque tune.
Future Mods: A mortgage...
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cjh
 Post subject: Re: whats the clean spots from?
Posted: Tue Jul 17, 2012 10:28 am 
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EFFUTURA4.05SP wrote:
cjh wrote:
EFFUTURA4.05SP wrote:
cjh wrote:
Here's a pic of some clean pistons........ 8-)

Thats one shiny heater pipe :shock:


and it currently doesn't leak, either........ :mrgreen:


Is it just a polished factory one? Looks good.


No, it's just paint. When I do cyl head gasket jobs, I clean and paint the engine blocks again, makes the job more presentable, and gives a new clean surface to look at if it should fail again, makes it easier to see.

 

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