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11-11-2020, 08:49 PM | #1 |
Scooby Newbie
Member#: 510046
Join Date: Dec 2019
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Calling All EJ257 Owners! HELP!!!!
I'm going to try and keep this short, I'm not looking to be lectured or to be told everything else that could be wrong, I'm just trying to figure out why for the time being; here we go.
Car is a 2006 sti, 580 miles ago had a full rebuild with forged components and hardware. This includes pistons, rods, head studs, master gasket kit, full valve job, timing belt, water pump, and all other items you do with a rebuild. Today I hopped in the car, let is idle for :45-1 minute, then started on my way. 30 seconds later I hopped onto the main road, went 1st, 2nd, and shifted into 3rd at 4500ish, shifted into 4th and the car died upon going into gear, I coasted to the side of the road, tried to restart and it just cranked. checked fuel, spark, and ECU, all good. Pulled the timing cover off to find my driver side intake cam has slipped 180 degrees out! removed the belt, checked all the idlers, checked the tensioner, checked all the cams, and of course rotated everything by hand. I have to be missing something right? I used an AISIN kit purchased from Amazon sold and shipped by Amazon, tensioner piston is not wet, no bearings are broken, and all gears have all sprockets intact. Can anyone shed any light on what could have possibly happened here? And for those of you wondering, I put the motor back into time, with the old belt and tensioner and it fired up, it turned over and idled without any concern I could hear. I will be doing a leak down test to see if there's anything that was hurt; but I'm just trying to get to the bottom of what happened right now.
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11-12-2020, 06:56 AM | #2 |
Scooby Newbie
Member#: 450712
Join Date: Jul 2016
Location: Indiana
Vehicle:04 STi WRB |
Someone correct me if I'm wrong... I would have thought that with the timing being out that far after slipping - your pistons would have had a conversation with your valves, being that these engines are interference engines. So I'm surprised that re-timing it that it even started back up.
Have you driven it since getting it back together? |
11-12-2020, 12:46 PM | #3 |
Scooby Specialist
Member#: 491095
Join Date: Sep 2018
Chapter/Region:
SWIC
Location: New Mexico
Vehicle:2009 STi Blue Blue |
if OP was lucky it would have just not been able to create compression thus the shutoff...dunno what could have happened to create 180 degree...thats alot of slip..
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11-12-2020, 01:27 PM | #4 |
Scooby Specialist
Member#: 193940
Join Date: Nov 2008
Location: Philly
Vehicle:2004 WRX STI Black RalliSpec Shortblock |
Could have been the AISIN kit tensioner. Thats why I use gates. Only thing i can think of.
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11-12-2020, 01:56 PM | #5 |
Scooby Newbie
Member#: 510046
Join Date: Dec 2019
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Last edited by Jp925; 11-12-2020 at 02:11 PM. |
11-12-2020, 03:36 PM | #6 |
Scooby Specialist
Member#: 373868
Join Date: Nov 2013
Chapter/Region:
Tri-State
Location: Queens, NY
Vehicle:'04 STi WRB |
Is gates good again I've heard mixed things? On the flip side I've always used aisin parts with good success in the past. Many of them are made in Japan. I'm surprised this tensioner failed so badly.
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11-12-2020, 04:58 PM | #7 |
Scooby Newbie
Member#: 510046
Join Date: Dec 2019
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I've read several articles about AISIN being the direct OEM supplier. I'm just not sure what to make of this horrible failure.
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11-12-2020, 11:37 PM | #8 |
Scooby Guru
Member#: 22412
Join Date: Aug 2002
Chapter/Region:
SWIC
Location: Albuquerque, NM
Vehicle:2024 Legacy Sport |
Are all of the belt guides in place?
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11-12-2020, 11:47 PM | #9 |
Scooby Newbie
Member#: 510046
Join Date: Dec 2019
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11-13-2020, 07:41 AM | #10 | |
Scooby Specialist
Member#: 373868
Join Date: Nov 2013
Chapter/Region:
Tri-State
Location: Queens, NY
Vehicle:'04 STi WRB |
Quote:
Majority of aisin off the shelf parts are made in Japan or USA. I was strongly considering them over gates for my next timing belt change so seeing this is making me wonder the root cause of OPs issue since typically the quality of Aisin parts are not questionable. |
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11-13-2020, 09:29 AM | #11 | |
Scooby Newbie
Member#: 510046
Join Date: Dec 2019
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Quote:
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11-13-2020, 09:52 AM | #12 |
Scooby Newbie
Member#: 510046
Join Date: Dec 2019
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Has anyone with any timing belt they’ve ever bought received “bleeding” instructions? How many subie guys out there bleed their tensioners before install?
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12-06-2020, 10:09 AM | #13 |
Scooby Newbie
Member#: 512771
Join Date: Mar 2020
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12-06-2020, 10:40 AM | #14 |
Scooby Specialist
Member#: 29292
Join Date: Nov 2002
Chapter/Region:
SCIC
Location: Orange County CA
Vehicle:2004 WRX wagon silver |
I would say its a installers fault as it is very wierd to be exactly 180 degrees out. to me that very suspect
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12-10-2020, 09:20 PM | #15 |
Scooby Guru
Member#: 487
Join Date: Nov 1999
Chapter/Region:
TXIC
Location: Houston TX
Vehicle:1998 /2005 STunIcorn Acadia Green USDM 22b |
Probably too obvious
Intake cam bolt torqued correctly? I remember lining up all 7 timing marks (B4 I bought cam bolt lock) That intake cam would spin 180 degrees if I breathed on it too hard while lacing tbelt around Tensioner is good guess as well |
12-11-2020, 01:02 AM | #16 |
Scooby Newbie
Member#: 510046
Join Date: Dec 2019
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Confirmed bunked tensioner, seems to be just a huge bummer of dumb luck. Ended up buying the gates blue kit and installing that. I have a pretty bad valve tick and leak down shows down 20 psi from the exhaust valve in cylinder 2. I’ll pull the heads and have them rebuilt in a few months. Major bummer but looks like it’s just a random failure.
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12-11-2020, 01:03 AM | #17 |
Scooby Newbie
Member#: 510046
Join Date: Dec 2019
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