Help me figure this out melted piston crowns who is to blame

Jerm7

New Member
Jul 12, 2008
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Lakeland, Florida
I have repaired alot of heads, if done right with the right grade alum filler you should be fine. Just weigh your options first of repair cost vs a good used head.
 

NashMan

WTF did he just wright ?
Aug 5, 2005
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Victoria BC
still not sure what to do about the head yet
but I did get the piston cheacked out at JE

shock and aww the coating was still on the piston but all that poures ness it just det marks 4 pistons did not pass 2 are still ok to use but I wonte

so what they say that happend was the motor detonated then the ecu tried to save it washed the walls with fule or number 2 got way way to hot and just tuched and got ass pounded

4 other pistons are mess as well

and this all happens in millsecounds

main cause a nasty over boost


so they fucked up and I will get new motor out of this
 
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mk3_7m

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Jul 21, 2007
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melbourne
Gosh they must gone through alot of investigation on those pistons. Well atleast you know now it wasn't your fault.
 

NashMan

WTF did he just wright ?
Aug 5, 2005
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Victoria BC
Kai;1762726 said:
I'm sorry did i just hear you say you're going to SAND a head? :nono:

as of now i still don't know i have to get it checked

but i am leaning towords replaceing it



but we will see
 

cricketjoe

New Member
Mar 27, 2010
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CA
NashMan;1752715 said:
cleaned my head found this

p1762921_1.jpg

p1762921_2.jpg

p1762921_3.jpg

p1762921_4.jpg



pretty much knew what happen now

biggest question now is this head now junk ?

kinda bumbed right now since it will mot likly get replaced or all ground away and reweled


Can someone explain to me what I'm looking for? Was it the sharp edges that helped detonate it?
 

NashMan

WTF did he just wright ?
Aug 5, 2005
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Victoria BC
^ No it was not, you don't wana touch the pads in less using custom fitted pistons to match what ever you are doing


thous rough marks are from detonation
 

cricketjoe

New Member
Mar 27, 2010
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CA
What ways are thereto fill in chips and gouges on the quench pads? I have a cylinder head that I took off the sharp edges around the combustion chamber but in 1 chamber there is deep gouging from previous detention.
 

NashMan

WTF did he just wright ?
Aug 5, 2005
4,940
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Victoria BC
yup I have a good head here that I will be replaceing with it

well at lest have nice ported paper weight