Pop goes the BRZ. Advice please. UPDATE - Page 5 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

WHITE · 07-16-2015, 08:55 PM

@Draco-REX

Here's were element tuning first encountered the problem:
http://www.ft86club.com/forums/showthread.php?t=73858

And if you scroll down a little on this page it talks about it briefly:
http://elementtuning.com/competition...r-wrx-fa20dit/

Again hopefully that's all your problem is.

Edit:

There was also a more recent occurance and I believe all that was needed was a new cam and rocker.

Draco-REX · 07-16-2015, 09:06 PM

Quote:

Originally Posted by WHITE

@Draco-REX

Here's were element tuning first encountered the problem:
http://www.ft86club.com/forums/showthread.php?t=73858

And if you scroll down a little on this page it talks about it briefly:
http://elementtuning.com/competition...r-wrx-fa20dit/

Again hopefully that's all your problem is.

Edit:

There was also a more recent occurance and I believe all that was needed was a new cam and rocker.

I don't want to get my hopes up, but I'm starting to think I dodged a bullet here. A week can't go by fast enough.

King Tut · 07-17-2015, 10:13 AM

Rockers fail. It happens without oil starvation. Common causes are extra revs and especially hitting the rev limiter.

Draco-REX · 07-17-2015, 10:59 AM

Quote:

Originally Posted by King Tut

Rockers fail. It happens without oil starvation. Common causes are extra revs and especially hitting the rev limiter.

I did bounce off the Rev limiter a couple times. But I believe Delicious uses a soft limiter.

spitfire481 · 07-17-2015, 12:46 PM

Valve springs help big time. Seems like they float a little with stock springs at the limiter and the rocker looses the direct pressure/contact and the smacking lets the pin walk out. We had a built motor a year and a half ago shoot out a rocker. Pulled it back out and replaced everything that broke and installed springs/retainers per full blown and it's been good since. Have 3 built motors revving to 8300rpm with ferrea springs and retainers and all have been good since that first one let go

kayoh · 07-19-2015, 10:12 AM

Newb Question, what does eating a rocker mean?

WHITE · 07-19-2015, 12:48 PM

Quote:

Originally Posted by kayoh

Newb Question, what does eating a rocker mean?

It just means one of the rocker arms in the head broke.

Draco-REX · 07-19-2015, 08:12 PM

Quote:

Originally Posted by kayoh

Newb Question, what does eating a rocker mean?

In this case, the pin that helps keep the rocker in place had a manufacturing defect, causing it to come out and let the rocker loose. The rocker is between the rotating cam and spring-loaded valve. So it get spat out with enough force to crack or even go through the valve cover.

Lonewolf · 07-19-2015, 08:18 PM

Quote:

Originally Posted by kayoh

Newb Question, what does eating a rocker mean?

In b4 @Tcoat somehow finds a relevant picture

Tcoat · 07-19-2015, 08:27 PM

Quote:

Originally Posted by Lonewolf

In b4 @Tcoat somehow finds a relevant picture

Generally don't play in the tech threads but that sounds like a challenge.

xjohnx · 07-23-2015, 01:47 AM

Quote:

Originally Posted by TurboBRZ

Two people with Delicious tunes on here who both seem to have had the same problem with the same supercharger kit at a reasonable boost level. For the kind of damage to have been done that you both describe, it leads me to believe there was something off on the tune - or that without an upgraded fuel pump (don't know if you have one or not) the engine wasn't getting enough.

Sorry, not buying this. @Draco-REX's failure happened as he was approaching a red light. Not exactly the type of situation you'd expect to see fuel starvation.

Draco-REX · 08-11-2015, 10:51 AM

ZB got the valve cover off and was able to get a good look at the damage. He confirmed rocker failure as the cause. Unfortunately when the rocker came loose it damaged the head. So the engine is getting pulled and the head removed. We'll give the cylinders a good look and see if forged internals is warranted. I really wish there were aftermarket rockers available.

No pictures yet.

GsxrMe · 08-11-2015, 12:52 PM

Did you ever extend your rpm over factory at any point?

ATL BRZ · 08-11-2015, 01:20 PM

Quote:

Originally Posted by Draco-REX

really wish there were aftermarket rockers available.

@Element Tuning offers rockers with secured axles to prevent them from sliding out.

07-17-2015, 10:13 AM	#59
King Tut NASA SpecE30 Racer Join Date: May 2012 Drives: 2006 Honda S2000 Location: Gulf Breeze, FL Posts: 7,279 Thanks: 607 Thanked 5,759 Times in 3,055 Posts Mentioned: 274 Post(s) Tagged: 10 Thread(s)	Rockers fail. It happens without oil starvation. Common causes are extra revs and especially hitting the rev limiter. __________________ - King Tut Street/Track Car: 2006 Honda S2000 TT3 \|\| Race Car: 1987 BMW 325is SpecE30 \|\| Tow Vehicle: 2014 RAM 1500 EcoDiesel Sold Cars: 2012 BMW M3 \|\| 2013 Subaru BRZ \|\| 2012 Porsche Cayman R \|\| 2009 Chevrolet Z06 \|\| 2009 BMW M3 \|\| 2004 BMW M3 \|\| 2004 Nissan 350Z

07-17-2015, 12:46 PM	#61
spitfire481 Senior Member Join Date: Mar 2013 Drives: 2JZ FRS Location: Pure Automotive Performance Posts: 1,378 Thanks: 97 Thanked 1,354 Times in 621 Posts Mentioned: 27 Post(s) Tagged: 2 Thread(s)	Valve springs help big time. Seems like they float a little with stock springs at the limiter and the rocker looses the direct pressure/contact and the smacking lets the pin walk out. We had a built motor a year and a half ago shoot out a rocker. Pulled it back out and replaced everything that broke and installed springs/retainers per full blown and it's been good since. Have 3 built motors revving to 8300rpm with ferrea springs and retainers and all have been good since that first one let go __________________ Pure Automotive Performance MoTeC Build Thread @spitfire481

07-19-2015, 10:12 AM	#62
kayoh Senior Member Join Date: Aug 2012 Drives: 2014 SWP Limited BRZ Location: Seattle, WA Posts: 290 Thanks: 118 Thanked 113 Times in 69 Posts Mentioned: 8 Post(s) Tagged: 0 Thread(s)	Newb Question, what does eating a rocker mean? __________________ Build Thread

08-11-2015, 12:52 PM	#69
GsxrMe Senior Member Join Date: Jul 2015 Drives: Late 2014 Subaru BRZ Location: Cape Coral, FL Posts: 557 Thanks: 20 Thanked 183 Times in 139 Posts Mentioned: 5 Post(s) Tagged: 2 Thread(s)	Did you ever extend your rpm over factory at any point? __________________ 2014 Subaru BRZ FBM Turbokit: GTX3076R - ECUTEK HRI FlexFuel tune - FBM 3" Turboback Exhaust - 550cc Injectors - Walbro 485 Fuel Pump - 4bar Map Sensor - FBM Oil Pan - ACT SB7-XTSS - AMSOIL all fluids - Forester XT Oil Cooler - Cusco engine, trans mounts - Whiteline rear differential bushings - Perrin shifter bushing - Firehawk 235/45/17 - AEM Failsafe

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07-16-2015, 08:55 PM	#57
WHITE Thats pretty neat Join Date: Jun 2013 Drives: LOADING...... Location: Wilkes-barre, pa Posts: 201 Thanks: 114 Thanked 95 Times in 67 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	@Draco-REX Here's were element tuning first encountered the problem: http://www.ft86club.com/forums/showthread.php?t=73858 And if you scroll down a little on this page it talks about it briefly: http://elementtuning.com/competition...r-wrx-fa20dit/ Again hopefully that's all your problem is. Edit: There was also a more recent occurance and I believe all that was needed was a new cam and rocker.

08-11-2015, 10:51 AM	#68
Draco-REX Corner Junkie Join Date: Feb 2012 Drives: 13 BRZ, 11 STI, 99 RS Location: Ohio Posts: 2,908 Thanks: 129 Thanked 1,518 Times in 701 Posts Mentioned: 11 Post(s) Tagged: 0 Thread(s)	ZB got the valve cover off and was able to get a good look at the damage. He confirmed rocker failure as the cause. Unfortunately when the rocker came loose it damaged the head. So the engine is getting pulled and the head removed. We'll give the cylinders a good look and see if forged internals is warranted. I really wish there were aftermarket rockers available. No pictures yet.

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