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Engine, Exhaust, Transmission Discuss the FR-S | 86 | BRZ engine, exhaust and drivetrain.


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Old 09-02-2020, 02:43 PM   #29
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Learned something new today. Is this a potential problem in the 2017+ engines as well? I know they had some revision to the valve stems, camshafts, and a minor change in rocker arm pivots for weight reduction, but I honestly don't know that any of those changes are helpful as I don't have a lot of knowledge on engine internals. I did a little searching on it and didn't find too much aside from a few cases that people have posted in the past.
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Old 09-02-2020, 03:36 PM   #30
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Learned something new today. Is this a potential problem in the 2017+ engines as well? I know they had some revision to the valve stems, camshafts, and a minor change in rocker arm pivots for weight reduction, but I honestly don't know that any of those changes are helpful as I don't have a lot of knowledge on engine internals. I did a little searching on it and didn't find too much aside from a few cases that people have posted in the past.
I believe the rockers in the 15'+ engines have deeper pockets and the pivots are taller. I don't recall for certain. There are a lot of revisions on the rocker pivots going back to 2014, but they are mostly due to changes in the oiling hole. I believe @solidsnake11 knows more details on the changes from his motor builds.
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Old 09-02-2020, 10:08 PM   #31
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Im down to order
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Old 09-02-2020, 11:21 PM   #32
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2014 plus has longer valves. Rockers have deeper recesses for valve and pivot. Pivots have smaller oil hole ,same height. Head castings interchange.
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Old 09-03-2020, 09:49 AM   #33
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I believe the rockers in the 15'+ engines have deeper pockets and the pivots are taller. I don't recall for certain. There are a lot of revisions on the rocker pivots going back to 2014, but they are mostly due to changes in the oiling hole. I believe @solidsnake11 knows more details on the changes from his motor builds.
Thanks for the clarification.
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Old 09-03-2020, 10:10 AM   #34
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2014 plus has longer valves. Rockers have deeper recesses for valve and pivot. Pivots have smaller oil hole ,same height. Head castings interchange.
But do these design changes also address the flaw that has been brought up by Denstoj and the OP with the rockers popping out under certain circumstances?
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Old 09-03-2020, 10:15 AM   #35
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But do these design changes also address the flaw that has been brought up by Denstoj and the OP with the rockers popping out under certain circumstances?
The changes were made to combat the rockers jumping off.
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Old 09-03-2020, 12:34 PM   #36
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I'm in for the group buy as long as the price isnt crazy
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Old 09-07-2020, 03:15 PM   #37
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Gents! If you're interested in purchasing the retainer kit, go ahead and shoot an email through to dennis@denstoj.com.au as we will no longer need to do a "group buy" and put any unnecessary pressure on someone to be a middle man.

The kit costs $450 USD + a $99 refundable security deposit + shipping (~ regular U.S domestic rates). See more info here: http://denstoj.com.au/retainer-kit/

The security deposit is refunded once Denstoj receives the original pivots from your engine. We recycle the parts to keep costs down.

Note, I'm affiliated with Denstoj so I hope I don't get banned for trying to sell stuff on here! We just noticed the thread and I wanted to help everyone out. We have a few kits in stock but need to understand how many more to make up.

Looking forward to hearing from everyone!
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Old 09-07-2020, 06:39 PM   #38
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Gents! If you're interested in purchasing the retainer kit, go ahead and shoot an email through to dennis@denstoj.com.au as we will no longer need to do a "group buy" and put any unnecessary pressure on someone to be a middle man.

The kit costs $450 USD + a $99 refundable security deposit + shipping (~ regular U.S domestic rates). See more info here: http://denstoj.com.au/retainer-kit/

The security deposit is refunded once Denstoj receives the original pivots from your engine. We recycle the parts to keep costs down.

Note, I'm affiliated with Denstoj so I hope I don't get banned for trying to sell stuff on here! We just noticed the thread and I wanted to help everyone out. We have a few kits in stock but need to understand how many more to make up.

Looking forward to hearing from everyone!
does it matter if the pivots are from the engine I want to put the new ones in? I have a spare and it would be easier to send those.
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I swear I will punch your car if you put these on. Right in the face.
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Old 09-07-2020, 09:39 PM   #39
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does it matter if the pivots are from the engine I want to put the new ones in? I have a spare and it would be easier to send those.
Nope doesn't matter - just need an original set.
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Old 09-07-2020, 10:45 PM   #40
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Nope doesn't matter - just need an original set.
I would use the newer ones with the smaller holes.
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Old 09-08-2020, 12:55 PM   #41
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Nope doesn't matter - just need an original set.
Iím curious as to what model year engine this problem was being demonstrated on in the video posted here and on the Denstoj website, and whether this engine was in its stock form.

As solidsnake11 here mentioned that the 2014 and up engines were modified by the manufacturer to solve this problem. I donít want to purchase parts that I donít need and pull my engine to install them in order to fix a problem that has already been solved by the manufacturer. Can you answer those questions for us?
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Old 09-08-2020, 06:34 PM   #42
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Iím curious as to what model year engine this problem was being demonstrated on in the video posted here and on the Denstoj website, and whether this engine was in its stock form.

As solidsnake11 here mentioned that the 2014 and up engines were modified by the manufacturer to solve this problem. I donít want to purchase parts that I donít need and pull my engine to install them in order to fix a problem that has already been solved by the manufacturer. Can you answer those questions for us?
So for those interested, Subaru/Toyota updated the rockers and pivots but the change didn't combat the issue we're seeing in the video (it was mentioned earlier that the change was for the oil). The height of the pivot didn't change, meaning that retaining kit can be used on any model year.

Note, it's important to check valve clearances during installation and swap out the lash adjuster buckets if required. This is unlikely if each lash adjuster bucket is returned to the original valve.

FYI, the engine in the video was factory sealed.
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