cracked piston

[ramses974]

big surprise when rebuilding my 5e , i have not founded why caused my overheating and after inspection
i saw this...a craked piston...Sure now what cause my overheat

 

[triple j]

did u do a compression test.

 

[ramses974]

did u do a compression test.

No
bzcause my compression tool was not with me . I have to removed all the pistons to inspect them ... and sure ,With this crack this is why cause my overheating

 

[azerty]

time for forged ones

 

[mork]

I had a broken piston that was considerably worse than that and I didn't get any overheating issues. Are you sure the engine doesn't have other problems?

 

[ramses974]

I had a broken piston that was considerably worse than that and I didn't get any overheating issues. Are you sure the engine doesn't have other problems?

sure the engine does not have any other problem

 

[ramses974]

time for forged ones

my car is always forged, but due to the fact that i have problem to find the rings with wosner i have to machine the stock piston to fit to my forged rods

 

[wildchild]

did you figure out the reason why it cracked in the first place? how much boost are you running and what size injectors?

 

[ramses974]

did you figure out the reason why it cracked in the first place? how much boost are you running and what size injectors?

Sure
i have not time to boost i properly due to the fact that my car was overheating , i have only done no more than 500km with my engine ...In fact the mechanic has bad fitted my piston that is all . It is not because i was overheating , that cause the piston cracked .First , my car was not overheating with my wosner pistons, until i changed them for low compression to test , and after that my car was all the time in overheat

 

[gorganl2000]

i've known 2 starlets with crack stock pistons before which did not have overheating issues
most they did was leak oil---blowby

 

[laskt9]

Mine has a small crack. Decent blow by. I'm going to drive it until it blows. It doesn't overheat

Sent from my SAMSUNG-SGH-I927 using Tapatalk 2

 

[Skalabala]

Overheating has nothing to do with broken pistons! Bad engine build between the forged and non forged is what makes it overheat.

 

[reyft]

Do you think détonation or alot power make cracked ring land!?

 

[Skalabala]

Do you think détonation or alot power make cracked ring land!?

Those are the biggest culprits that break ring lands.
Standard pistons don't like 250hp

 

[George611]

standard pistons dont like much tbh lol

 

[starletburkie]

i had an engine that just kept cracking pistons on me dispite different tunes

 

[ramses974]

Overheating has nothing to do with broken pistons! Bad engine build between the forged and non forged is what makes it overheat.

i have an addition of bad building:
-caps exh. & inta. were not repected and not at the right place
-the cracked piston

 

[Skalabala]

Did you mix up the cam caps? They are factory marked.

 

[ramses974]

not me but the last mechanic did that...i noticed that wirh my new mechanic

Did you mix up the cam caps? They are factory marked.

 

[gorganl2000]

standard pistons take relatively good power if the tune is very good
its been done a lot by many people....so its kind of proven

however, there's no doubt forged pistons are stronger--fact

that said, if the tune is not spot on, forged or stock pistons will eventually be damaged.