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Old 11-08-2019, 06:50 PM   #1976
dusty_sombero
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Quote:
Originally Posted by Goalmaker88 View Post
I agree with you. That’s nothing. The rev limiter is set by Subaru and should be safe. The people here are jerks.
I can’t believe you babied your car so much. I’ve just blown my engine after 67K miles, and it’s because I hadn’t changed the oil in 12K miles and was driving at the max speed in 5th gear for more than 30 seconds (empty highway, I’m not a maniac). That’s more a reason to break a motor than what you’re saying. Good luck!
This is my favorite post of the year. What’s max in 5th? Like 145 lol? For 30 seconds? You’re crazy and we’re not even taking about your decision to forgo oil changes. Wow. Please don’t fix the subie, please buy something faster and more expensive: you’ve earned it.
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Old 11-08-2019, 07:05 PM   #1977
Straight6
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That HAS to be a troll post. Please tell me that was a troll post. PLEASE!
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Old 11-08-2019, 07:17 PM   #1978
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Haven't changed my oil in 12k

doing 145 in 5th gear on the highway.

blows engine

Sounds like nasioc all right
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Old 11-08-2019, 07:38 PM   #1979
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I feel like a lot of 15 and 16 in here. FA20DIT was so new back then that Subaru must have messed it up for the first 2 years.
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Old 11-08-2019, 08:10 PM   #1980
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Quote:
Originally Posted by 3eyesraver View Post
I feel like a lot of 15 and 16 in here. FA20DIT was so new back then that Subaru must have messed it up for the first 2 years.
The limits of the engine were also not really known yet.
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Old 11-08-2019, 08:28 PM   #1981
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Quote:
Originally Posted by Sillo View Post
The limits of the engine were also not really known yet.
I would say it is more to due with a lack of knowledge of how to tune these di motors
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Old 11-08-2019, 11:18 PM   #1982
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Quote:
Originally Posted by Waddlz View Post
Haven't changed my oil in 12k

doing 145 in 5th gear on the highway.

blows engine

Sounds like nasioc all right
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Old 11-11-2019, 02:14 PM   #1983
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Quote:
Originally Posted by 3eyesraver View Post
I feel like a lot of 15 and 16 in here. FA20DIT was so new back then that Subaru must have messed it up for the first 2 years.
2016 WRX here. Stage 1 protuned with light modding for about 50k miles now. Total 95k miles on the car as a whole. Everything is healthy. I daily drive... so normal cruising and then fairly often i gun it when i get the chance. Think redline at least 1 or 2 times a day. Then there is mexico with the boiz...

You take care of it and chances of it sploding drop significantly.

Keep in mind my personal situation is at stage 1. A lot of people went stage 2 and then blow up relatively low mileage stock blocks.
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Old 12-21-2019, 12:15 PM   #1984
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Model/Year:15 WRX
Milage:85,000
EM: OEM
Mods: None
Fuel: 93
Oil: Dealer changed
Circumstances: Car has lived an easy life, I just use it to drive to and from work - buzz up and down the highway. A day prior to it breaking it seemed to be down on power as I pulled on to the highway but not not so much that I gave it a second thought. The following morning I was caught in a traffic jam and moved maybe 500 yards in 45 minutes. When traffic broke I took it up to a decent speed, something I don't normally do. About 5 minutes after, power was coming and going and the motor developed a horrid knock. The oil light came on as I pulled off the highway and shut it down.

The car is at the Subaru dealer and they are working up an estimate to tear it down. That knock sounded expensive. Any advice on this situation is appreciated. I feel I'm screwed no matter what though.
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Old 12-21-2019, 05:38 PM   #1985
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Quote:
Originally Posted by noobultimatum View Post
2016 WRX here. Stage 1 protuned with light modding for about 50k miles now. Total 95k miles on the car as a whole. Everything is healthy. I daily drive... so normal cruising and then fairly often i gun it when i get the chance. Think redline at least 1 or 2 times a day. Then there is mexico with the boiz...

You take care of it and chances of it sploding drop significantly.

Keep in mind my personal situation is at stage 1. A lot of people went stage 2 and then blow up relatively low mileage stock blocks.
You're statement about "stage 2" engine failures.... how many personally do you know? Cause if you check the spreadsheet... STOCK motors fail too.... if not more.
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Old 12-21-2019, 07:58 PM   #1986
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Lol stage 2 is more efficient power-wise.
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Old 12-22-2019, 11:46 AM   #1987
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Quote:
Originally Posted by BostonShaun View Post
You're statement about "stage 2" engine failures.... how many personally do you know? Cause if you check the spreadsheet... STOCK motors fail too.... if not more.
Yea I am not denying that. It goes with out saying that stage 2 = more abuse. Couple that with bad driver mod and you got kabooms left and right. Now that the platform is better understood, we see less of it.

Personally blown blocks that i know? what does that matter lmao anecdotal evidence... sure. I know 3 local FA20DIT that blew at stage 2. Why? They drove like the typical tard --- high load/low revs & generally abusing the car.
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Old 01-02-2020, 02:27 PM   #1988
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Model/Year: 2015 WRX
Mileage:63k, didn't do any mods 'til at 52k
EM:Bren E-Tune
Mods:Turboback, Cobb CAI, TGV delete, EBCS, BrenTune
Fuel:Chevron/Shell 91 only
Oil:Mobil 1 Full syn
Circumstances: E-tune for TGV delete. No knock showing while running new map, then tons of knock about 2min after one 3rd gear pull to redline, while cruising back to town. Map was solid, pull log looked great.
Actual engine failure: Piston 1 Ringland failure, oil on sparkplug, etc. Mechanic I'm working with doesn't think the failure has anything to do with mods/pull.
Going to be building a new short block up. Not sure if I'm going to buy an assembled Crawford or build up one with tuner out here. Waiting on bid estimate.
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Old 01-02-2020, 03:30 PM   #1989
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Man, that's rough. How bad were the knock readings after the pull? Bren have any insights as to what might have caused this?

Good luck.


Quote:
Originally Posted by SnoBrrru View Post
Model/Year: 2015 WRX
Mileage:63k, didn't do any mods 'til at 52k
EM:Bren E-Tune
Mods:Turboback, Cobb CAI, TGV delete, EBCS, BrenTune
Fuel:Chevron/Shell 91 only
Oil:Mobil 1 Full syn
Circumstances: E-tune for TGV delete. No knock showing while running new map, then tons of knock about 2min after one 3rd gear pull to redline, while cruising back to town. Map was solid, pull log looked great.
Actual engine failure: Piston 1 Ringland failure, oil on sparkplug, etc. Mechanic I'm working with doesn't think the failure has anything to do with mods/pull.
Going to be building a new short block up. Not sure if I'm going to buy an assembled Crawford or build up one with tuner out here. Waiting on bid estimate.
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Old 01-06-2020, 09:01 PM   #1990
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Quote:
Originally Posted by 2018wrx_newbie View Post
Man, that's rough. How bad were the knock readings after the pull? Bren have any insights as to what might have caused this?

Good luck.
The actual pull log read clean and strong. Didn’t get any feedback from the folks at Bren, but the tuner/mechanic I’m working with here in Reno said the failure and the tune don’t appear to be related as far as he can tell - the failure wasn’t because of a bad tune, just bad luck.

Knock readings were in the mid-teens.

Last edited by SnoBrrru; 01-15-2020 at 10:03 AM. Reason: Didn’t answer question
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Old 01-13-2020, 06:27 PM   #1991
aliveoutofhabit
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How about a Forester?

Model/Year: 14 Forester 2.0XT
Milage: 88xxx
EM:Stock
Mods: Stock
Fuel: Good ol' California 91
Oil: 5w30 Pennzoil Synthetic every 5k miles (or less if I don't drive it for a while, it's a backup car we use for trips only)
Circumstances: Severe knock, misfire on cylinder 3, no power
Actual engine failure: Piston skirt on cylinder 3 broke, looked like the crankshaft counterweights have been rubbing on the block for a long time. Contacted SOA about it but I'm probably ****ed.

Anyone seen piston skirts break like this? I got a used engine out of a wrecked Forester and it had the EXACT SAME FAILURE! I'm not sure which cylinder failed in the used engine but we happened to drop the oil pan and noticed a piece of piston sitting in it almost the exact same shape. Now I'm waiting for the THIRD engine from these guys... No car for almost a month so far.
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Old 01-13-2020, 09:29 PM   #1992
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Quote:
Originally Posted by aliveoutofhabit View Post
How about a Forester?

Model/Year: 14 Forester 2.0XT
Milage: 88xxx
EM:Stock
Mods: Stock
Fuel: Good ol' California 91
Oil: 5w30 Pennzoil Synthetic every 5k miles (or less if I don't drive it for a while, it's a backup car we use for trips only)
Circumstances: Severe knock, misfire on cylinder 3, no power
Actual engine failure: Piston skirt on cylinder 3 broke, looked like the crankshaft counterweights have been rubbing on the block for a long time. Contacted SOA about it but I'm probably ****ed.

Anyone seen piston skirts break like this? I got a used engine out of a wrecked Forester and it had the EXACT SAME FAILURE! I'm not sure which cylinder failed in the used engine but we happened to drop the oil pan and noticed a piece of piston sitting in it almost the exact same shape. Now I'm waiting for the THIRD engine from these guys... No car for almost a month so far.
Piston skirt breaking sounds like some LSPI. I've seen a few dit engines with destroyed pistons as well as spark plugs. Did it randomly happen or over time??
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Old 01-14-2020, 08:10 AM   #1993
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Quote:
Originally Posted by aliveoutofhabit View Post
Anyone seen piston skirts break like this?
Had it happen to our FA WRX. Check for a very slightly bent rod.

The markings you see on the block are likely factory clearance machining for the crank. If the crank actually contacted the block, you'd know it!! It's common to mistake this machining for rubbing as it's not the prettiest of finishes.
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Old 01-14-2020, 10:05 AM   #1994
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Quote:
Originally Posted by KillerBMotorsport View Post
Had it happen to our FA WRX. Check for a very slightly bent rod.

The markings you see on the block are likely factory clearance machining for the crank. If the crank actually contacted the block, you'd know it!! It's common to mistake this machining for rubbing as it's not the prettiest of finishes.
THIS is good to know info.
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Old 01-15-2020, 11:02 PM   #1995
aliveoutofhabit
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Quote:
Originally Posted by KillerBMotorsport View Post
Had it happen to our FA WRX. Check for a very slightly bent rod.

The markings you see on the block are likely factory clearance machining for the crank. If the crank actually contacted the block, you'd know it!! It's common to mistake this machining for rubbing as it's not the prettiest of finishes.
Yeah after thinking about it I'm sure they are just reliefs for crank clearance. Just by eyeballing it with the upper pan off it does look like the rod is very very slightly bent but it's hard to tell without complete removal.

The car has displayed an odd surging and very occasional misfire in the past but it never set a code. When the rod knock started it was very sudden. I posted pics on subaruforester.org in an engine failure thread I started.

I did find it amazing that one of the bad engines I got from the wrecker had an identical piston fragment in the pan. The yard swore the engine ran perfectly before they pulled it and urged me to install it anyway. I politely declined.

Last edited by aliveoutofhabit; 01-15-2020 at 11:12 PM. Reason: Typo
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Old 01-16-2020, 05:08 PM   #1996
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Here are some of the pics I posted over at subaruforester.org



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Old 01-17-2020, 03:53 PM   #1997
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This is probably the most depressing thread on any forums I've been apart of and I have been on and off car forums since 2000 haha. I see failures of this motor happening with bad driver mods/bad tuning knowledge (especially in the beginning when it first came out )/getting passed around to multiple owners/poor maintenance. I feel like I need to start a more uplifting thread like '15+ successful WRX motor tuning roll-call' seriously ...
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Old 01-17-2020, 04:10 PM   #1998
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Quote:
Originally Posted by KTMXCW View Post
This is probably the most depressing thread on any forums I've been apart of and I have been on and off car forums since 2000 haha. I see failures of this motor happening with bad driver mods/bad tuning knowledge (especially in the beginning when it first came out )/getting passed around to multiple owners/poor maintenance. I feel like I need to start a more uplifting thread like '15+ successful WRX motor tuning roll-call' seriously ...
Someone had the same idea.

See here

https://forums.nasioc.com/forums/sho....php?t=2756819
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Old 01-17-2020, 04:10 PM   #1999
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Quote:
Originally Posted by KTMXCW View Post
This is probably the most depressing thread on any forums I've been apart of and I have been on and off car forums since 2000 haha. I see failures of this motor happening with bad driver mods/bad tuning knowledge (especially in the beginning when it first came out )/getting passed around to multiple owners/poor maintenance. I feel like I need to start a more uplifting thread like '15+ successful WRX motor tuning roll-call' seriously ...
There is one actually lol
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Old 01-22-2020, 09:29 PM   #2000
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and here is a not broken yet.
WRX 2015 270hp - DAM dropped to 0.812 three months ago and never reset. Timing must have been pulled significantly and there were no knock events, during that period.
Reflashed back to 91 recently and all looks normal so far, DAM holding at 1.0.
Will be seeing tuner soon as a service is due.

Last edited by dogtrumpert; 01-22-2020 at 09:37 PM.
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