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Old 10-15-2019, 03:29 PM   #176
PDXREALTOR
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Join Date: May 2017
Location: PDX OREGON
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2017 STI

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Quote:
Originally Posted by Paul View Post
If it glazed the cylinders the rings just wouldnít seat. If it diluted the oil badly Iíd expect a bearing to go way before this damage.
The rings were seated. No oil use at all until I used the top end cleaner


Carbon breaking off and getting stuck between cylinder and bore was all I could think of but didnít see pictures of the pistons out of block to know. So I wasnít sure and why I asked. Only time Ive heard of issues using that product was on super tired motors where the carbon was actually helping the situation and removing it is the nail in coffin for the old engine. Iíve literally used the product on easily over 20+ cars in the past never any engine problems after. JW why did you want to run the product on a fresh engine?

Possible carbon build up on valves

I did know the evidence would be hard to prove just like blown motors, builders count on that ..JK...kinda. Itís very tricky to prove but to me in this situation there has so many other more common/logical reasons for the outcome....like
Who tuned car, Was tune dialed in from day one?

I tuned it. Yes it had a solid break in tune. No one touched the car or motor but me and the builer
Seems like tons of carbon build up for a motor with only 1k also has an orange color to it like an octane booster was ran through the engine.

All that carbon build didn't happen in the first 1k miles. Most if not all is from driving around consuming a quart every 250 miles... loss of oil control

Torco- used it for a tank or two on the last drive

Do you have an oil temp gauge in the car? Youíd be surprised how long it takes vs H20 temp.

Yes - oil temp and pressure, and water

Do you know the PTW specs and which pistons were used? I do, but that's not my info to share.

Edit: just looked at that last picture of heads again...is that one valve chipped and did any hit the pistons? No - part of the picture. No chipped or damaged valves

FWIW: Only reason I posted here is because when people started asking questions in the thread you made in the built motor section you said to discuss it here.

No worries. If you spend some time reading a few pages back it may answer some questions for you.
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Old 11-17-2019, 06:56 PM   #177
2slofouru
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Member#: 90539
Join Date: Jul 2005
Chapter/Region: South East
Location: Lake Charles
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My BOV goes
COVFEFE!

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1- Why did you use top end cleaner? (forgot to ask previously)

2- How's she doing now, any progress?
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Old 11-17-2019, 07:14 PM   #178
PDXREALTOR
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Quote:
Originally Posted by 2slofouru View Post
1- Why did you use top end cleaner? (forgot to ask previously)

2- How's she doing now, any progress?
During a leak down test I got a fluctuating reading. My thought was carbon build up.....

How's she doing now? Lol... Geeze...

I double checked valve lash and found the exhaust on cyl. 4 a touch loose. It was recommended the lash be tightened up so they sent me two buckets and just like that the lash was right on the money.

The cams didn't feel right on re-assembly (a bit tight, and noisy) so I started to investigate what was going on and in the process found a bent cam. Bent .004 ....... It required the buckets all be removed so the cam could rotate far enough to bind up.

The above mis-fortune, though it appears a setback, was a blessing in disguise. Had it not been for loose lash, and the proceeding tight cams on install, I would have had failure on startup if not cranking. I don't recall the clearance of the cam journals but I'm sure it's not enough to allow a .004 out of round cam to rotate.

At this point all I can do is laugh. I decided to just make the 17 the 'race car' and that state of mind change has really helped with the grin and bear it mind set that's missing. There is no sense of urgency any more.

We are going to get a second 15+ sti. We have a new mildly built motor here and the BW 7163 kit. I'll cat it and keep it a bit more street friendly. will have a mild tune on it. Definitely, not the 35 psi I was running on the 17.


For the 17 I just picked up Radium surge tank with Wallbro 450.
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Old 11-17-2019, 07:46 PM   #179
2slofouru
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Go big something something! Well crap...that's a crazy unlucky streak.

I've turned mine over by hand but the ring friction makes it tough to tell if anything else is abnormal. Larry's sold me on the gsc parts' quality, can only hope I don't mess up any of their work! 😂

It really would suck taking me so long only to find something wrong before it's streetable. Mine is taking so much longer, at least you've been able to enjoy yours for a while.
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Old 11-17-2019, 07:57 PM   #180
PDXREALTOR
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Quote:
Originally Posted by 2slofouru View Post
Go big something something! Well crap...that's a crazy unlucky streak.

I've turned mine over by hand but the ring friction makes it tough to tell if anything else is abnormal. Larry's sold me on the gsc parts' quality, can only hope I don't mess up any of their work! ��

It really would suck taking me so long only to find something wrong before it's streetable. Mine is taking so much longer, at least you've been able to enjoy yours for a while.
I thought about bumping up to an 8374 but in reality the 7670 will fit my needs better ...

Mine wasn't timed. I was turning the cams with just the cam and one hand, or the cam and a gear. I probably spent an hour twisting cams and contemplating if there was an issue or not. A lot of horror stories show up when you start researching tight cams sti.

Had it been timed there is absolutely zero chance I would have felt it. Hell I could barely tell with just the gears on.


Do you have a build thread?
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Old 11-17-2019, 08:15 PM   #181
2slofouru
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My BOV goes
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Sort of a build thread, but basically what I've done since my first subaru minus my first ej18 to ej25d swap further back. Most pics are photofuket so they are photofuked. It's not a long thread, but people have taught me a few things there and I've learned a bit over the years just being on the forums in general.

https://forums.nasioc.com/forums/sho....php?t=1471118

Couple of (still current) motor pics, couldn't get them to show:

https://forums.nasioc.com/forums/sho...622327&page=35
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