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  #11  
Old 25-03-2014, 09:31 AM
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12 teeth? haha whats the o2 sensor got to do with it? Case closed.

Timing belt slipped, skipped, missed etc and rooted the ol engine
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  #12  
Old 25-03-2014, 09:41 AM
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case closed, are you sure?

It was an STi timing belt with a brand new Subaru tensioner..

How can it slip. i am interested to know

p.s i appreciate all the constructive feedback thus far
Last edited by Dscott; 25-03-2014 at 09:44 AM.
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  #13  
Old 25-03-2014, 09:43 AM
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http://www.perth-wrx.com/vb/mechanic...misfiring.html

Now this.
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  #14  
Old 25-03-2014, 09:46 AM
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That turned out to be a faulty o2 sensor.
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Old 25-03-2014, 10:16 AM
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lol.

O2 sensor isn't going to do this damage, it would just run a bit rich, and throw a cel.

You have not installed your timing belt/cam gears correctly and it has cost you your engine....

OEM cam gears and belt is hard enough for the average home mechanic, let alone adjustable cam gears!

It's a costly mistake, but hopefully one that you can build on. Now, do it once, do it right...
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Old 25-03-2014, 10:26 AM
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thanks guys, I guess back to the drawing board..
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  #17  
Old 25-03-2014, 11:02 AM
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expensive mistake, condolances mate
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  #18  
Old 25-03-2014, 11:18 AM
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Did you miss a gear? a huge over-rev can cause belt skip.

Were you using OEM valve retainers & collets?

I just read the other post......

This:
Quote:
Originally Posted by Rossco View Post
You need a dial gauge reading off the valve bucket to dial in the cams static timing with any sort of accuracy. Just moving the adjustable wheel blindly may result in valve clash and fuck your motor.
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Last edited by Rossco; 25-03-2014 at 11:20 AM.
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  #19  
Old 25-03-2014, 11:38 AM
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Quote:
Originally Posted by Dscott View Post
2.1 manley stroker pistons.

I can say i suspect the car was tuned with a faulty o2..

regarding EJ207 and Ej20K heads, i am using the correct headgasket as per the compression matrix floating around. I would like Dougs feedback.. i know they do this combo in the US.

I've heard the motor ping once and that was a on a very hot day, many months before.

Knock doesn't exceed 50, boost doesn't go pass 1.5 bar, mostly running 1.3~1.4.

i suspect the motor was leaning out, surely the o2 isnt to blame??
I assume you are running a power FC?

I just read your other thread again - You mentioned Surging at 2500 rpm - that's a sign of a dead Air flow meter.
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  #20  
Old 25-03-2014, 09:55 PM
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no, I was cruising 2000~3000rpm, the surging is during this rev range also.

Jun Valve retainers and collets.

yes a Powerfc.


Quote:
Originally Posted by Rossco View Post
Did you miss a gear? a huge over-rev can cause belt skip.

Were you using OEM valve retainers & collets?

I just read the other post......

This:
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