What would cause this? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

woode · 03-09-2014, 07:32 PM

I picked up yet another FA20 block for dirt cheap. One of the pistons has some pretty bad pinging, and the wall has one scratch. The pistons are coming out anyways obviously but I am mostly just curious what would cause it to get this bad?
The guy I picked up the engine from got it from another guy who got it from another guy so he had no idea.

Bad piston:

Dunno how that broke in there..

Engine

for $200 I figured I would find something to do with it..

EDIT: just realized my thread title kind of sucks, MODS if you could add something about the piston into the title please..

AdrianG · 03-09-2014, 07:43 PM

Turbo coming apart maybe? Busted valve?

- AdrianG

Ranatsu · 03-09-2014, 07:46 PM

Lots of detonation?

woode · 03-09-2014, 07:56 PM

Quote:

Originally Posted by AdrianG

Turbo coming apart maybe? Busted valve?

- AdrianG

That was sorta what I was thinking, I have just never seen the valvetrain do a number quite like that on a piston.. but

.

Gords_zenith · 03-09-2014, 08:00 PM

Broken spark plug electrode from detonation?

mad_sb · 03-10-2014, 09:46 AM

Not detonation at all, those marks are from foreign material entering the chamber. Could have started with a spark plug electrode/s as @Gords_zenith said then grown into piston to valve contact.

stugray · 03-10-2014, 10:21 AM

Something fell into the engine.

Whoever owns the car it came out of can probably find the remnants in their cat.

Deadspool · 03-10-2014, 10:49 AM

How are you finding these things??

I need a block.

SmsAlSuwaidi · 03-10-2014, 07:50 PM

Wow 200 :/

Sent from my IBrick

woode · 03-10-2014, 10:46 PM

Quote:

Originally Posted by Deadspool

How are you finding these things??

I need a block.

Facebook and craigslist, lol.

woode · 03-10-2014, 10:47 PM

Quote:

Originally Posted by SmsAlSuwaidi

Wow 200 :/

Sent from my IBrick

As in you think I overpaid or got a deal? Regardless I feel like its a good deal as its only $200 down the drain.

SmsAlSuwaidi · 03-10-2014, 10:59 PM

Quote:

Originally Posted by woode

As in you think I overpaid or got a deal? Regardless I feel like its a good deal as its only $200 down the drain.

Great deal !
Im going to start searching i guess

Sent from my IBrick

Revolutions Performance · 03-11-2014, 12:00 AM

It's a great block to sleeve and build.

carbonBLUE · 03-11-2014, 03:23 AM

You could turn it into a coffee table!

03-10-2014, 09:46 AM	#6
mad_sb Senior Member Join Date: Jan 2013 Drives: 2013 Asphalt FR-S Location: Orange County Posts: 1,639 Thanks: 632 Thanked 982 Times in 537 Posts Mentioned: 100 Post(s) Tagged: 0 Thread(s)	Not detonation at all, those marks are from foreign material entering the chamber. Could have started with a spark plug electrode/s as @Gords_zenith said then grown into piston to valve contact. __________________ ~Namaste~ 2013 Asphalt FRS

03-10-2014, 10:49 AM	#8
Deadspool Much title. Wow. Join Date: Mar 2013 Drives: 2013 BRZ Sport-Tech Location: Edmonton, AB Posts: 716 Thanks: 118 Thanked 292 Times in 163 Posts Mentioned: 8 Post(s) Tagged: 0 Thread(s)	How are you finding these things?? I need a block. __________________ ༼ つ ◕_◕ ༽つI PUT A SPELL ON YOU ༼ つ ◕_◕ ༽つ

03-10-2014, 07:50 PM	#9
SmsAlSuwaidi Boosted Join Date: Feb 2013 Drives: Not a supra....yet Location: Riverside,CA/ Abu Dhabi,UAE Posts: 2,925 Thanks: 487 Thanked 1,203 Times in 812 Posts Mentioned: 90 Post(s) Tagged: 2 Thread(s)	Wow 200 :/ Sent from my IBrick __________________ https://www.facebook.com/Smsalsuwaidiracing/

03-11-2014, 03:23 AM	#14
carbonBLUE Reverse Burnouts Join Date: Oct 2011 Drives: 2013 Argento FRS Location: dallas!!! Posts: 2,894 Thanks: 707 Thanked 1,257 Times in 592 Posts Mentioned: 30 Post(s) Tagged: 1 Thread(s)	You could turn it into a coffee table! __________________ 2000 Carbon Blue Toyota Celica GTS 152000 miles (wont forget you) 2013 Argento Scion FR-S 2011 Infiniti G37x

03-09-2014, 07:43 PM	#2
AdrianG Generally Well Liked Join Date: Aug 2013 Drives: '08 STi Hatch, '11 Outback 3.6R Location: Ontario Posts: 419 Thanks: 43 Thanked 197 Times in 125 Posts Mentioned: 9 Post(s) Tagged: 0 Thread(s)	Turbo coming apart maybe? Busted valve? - AdrianG

03-09-2014, 07:46 PM	#3
Ranatsu Cone basher Join Date: Mar 2012 Drives: 2017 Subaru BRZ Series.Yellow Location: Dodgin cones in San Antonio, TX Posts: 800 Thanks: 51 Thanked 256 Times in 169 Posts Mentioned: 7 Post(s) Tagged: 0 Thread(s)	Lots of detonation?

03-09-2014, 08:00 PM	#5
Gords_zenith Senior Member Join Date: Nov 2012 Drives: WRB BRZ Sport Tech Location: Durham, Canada Posts: 354 Thanks: 178 Thanked 110 Times in 64 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	Broken spark plug electrode from detonation?

03-10-2014, 10:21 AM	#7
stugray Banned Join Date: Sep 2013 Drives: 2013 GBS BRZ Limited Location: Colorado Posts: 1,925 Thanks: 627 Thanked 1,445 Times in 711 Posts Mentioned: 41 Post(s) Tagged: 0 Thread(s)	Something fell into the engine. Whoever owns the car it came out of can probably find the remnants in their cat.

03-11-2014, 12:00 AM	#13
Revolutions Performance Join Date: Feb 2014 Drives: 2013 SWP BRZ RP Turbo Kit Location: Colorado Springs, CO Posts: 92 Thanks: 45 Thanked 51 Times in 28 Posts Mentioned: 4 Post(s) Tagged: 0 Thread(s)	It's a great block to sleeve and build.

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