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Old 02-05-2006, 05:12 PM   #1
Jglisson
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Default Burnt piston in engine

Well...

Some of you do not know...but I blew my engine in my 99 GT about a month ago. I just now tore down my factory engine. Piston #7 has a nice chunk missing out of it. About half the cylinders were full of coolant when I pulled the heads. I still haven't determined what caused the piston to burn. The burn is underneath the intake valve which is strange as well. I wasn't spraying at the time the engine popped and what few times I have sprayed I was only running a 100shot with 93 octane.

Any ideas?

I will be getting rid of some good parts soon...If you name it, I have probably got it.

Good PI heads, sensors, etc.
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Old 02-05-2006, 06:29 PM   #2
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Default RE: Burnt piston in engine

"I gotta be honest... these 2V 4.6 motors are weak as hell..." - Dave2000GT
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Old 02-05-2006, 06:44 PM   #3
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Default RE: Burnt piston in engine

^^ lol i remember that, hope u got your flame suit on.

anyyway, what were you doing when it blew?
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Old 02-05-2006, 06:48 PM   #4
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Default RE: Burnt piston in engine


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ORIGINAL: Brute03

^^ lol i remember that, hope u got your flame suit on.

anyyway, what were you doing when it blew?
Not only that but I've surrounded myself with fire retardant just check out the things people say about 4.6L thread... I think I might get booed off the forum..
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Old 02-06-2006, 12:09 AM   #5
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Default RE: Burnt piston in engine

haha i remember that since it was in my post.. still lookin at new cars.. but damn it seems like everytime i look through the forums i end up readin about someone blowin there sohc 4.6
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Old 02-06-2006, 01:12 AM   #6
Jglisson
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Default RE: Burnt piston in engine

I wasn't spraying...but I was laying into the throttle.. There is no doubt about that.

Funny thing though...all the police cars hold up quite well with the SOHC 4.6
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Old 02-06-2006, 01:18 AM   #7
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Default RE: Burnt piston in engine

well the 4.6 is weak as hell when your pushing 5K RPM and don't have any oil in it.......DOH!!!!! (I won't be doing that again)
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Old 02-06-2006, 02:09 AM   #8
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Default RE: Burnt piston in engine

100 shot dry is pushing it, mine started to pop (detonate) at 75 shot dry, so i have a 50 shot right now untill my fuel rair adapter comes in.
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Old 02-06-2006, 02:19 AM   #9
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Default RE: Burnt piston in engine

how many times have you sprayed befor? and were you tuned? becuase the 4.6 should have lasted a long time if it was tuned good. the 4.6s are strong motors as long as they are tuned right.
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Old 02-06-2006, 02:22 AM   #10
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Default RE: Burnt piston in engine

People that are always saying that the 4.6 is weak is because their tune sucked. It's always in the tune.
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Old 02-06-2006, 02:22 AM
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