05-04-2020, 02:45 AM | #1 |
Member
Join Date: May 2020
Drives: 86
Location: NSFW
Posts: 14
Thanks: 1
Thanked 2 Times in 2 Posts
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
|
?
*
Last edited by Pil; 03-02-2021 at 02:02 AM. |
05-04-2020, 07:50 AM | #2 |
Senior Member
Join Date: Jul 2014
Drives: 2020 Hakone
Location: London, Ont
Posts: 69,845
Thanks: 61,656
Thanked 108,286 Times in 46,456 Posts
Mentioned: 2495 Post(s)
Tagged: 50 Thread(s)
|
What year car? Are there any CELs or codes?
__________________
Racecar spelled backwards is Racecar, because Racecar.
|
05-04-2020, 08:01 AM | #3 |
Senior Member
Join Date: Jan 2018
Drives: 2013 frs red
Location: South Florida
Posts: 3,517
Thanks: 2,520
Thanked 3,089 Times in 1,654 Posts
Mentioned: 6 Post(s)
Tagged: 1 Thread(s)
|
Both valves leaking quite a bit. Head has to come off. I would suspect valve springs as well given the circumstances of the failure
Last edited by Lantanafrs2; 05-04-2020 at 08:12 AM. |
05-04-2020, 08:16 AM | #5 |
Senior Member
Join Date: Jul 2014
Drives: 2020 Hakone
Location: London, Ont
Posts: 69,845
Thanks: 61,656
Thanked 108,286 Times in 46,456 Posts
Mentioned: 2495 Post(s)
Tagged: 50 Thread(s)
|
No audible rattles or other strange noises? A broken or week valve spring could indeed cause a misfire.
__________________
Racecar spelled backwards is Racecar, because Racecar.
|
05-04-2020, 08:20 AM | #6 |
Member
Join Date: May 2020
Drives: 86
Location: NSFW
Posts: 14
Thanks: 1
Thanked 2 Times in 2 Posts
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
|
|
05-04-2020, 08:31 AM | #7 | |
Senior Member
Join Date: Jul 2014
Drives: 2020 Hakone
Location: London, Ont
Posts: 69,845
Thanks: 61,656
Thanked 108,286 Times in 46,456 Posts
Mentioned: 2495 Post(s)
Tagged: 50 Thread(s)
|
Quote:
Could be a weak spring but it would be very unusual when outside the recall window.
__________________
Racecar spelled backwards is Racecar, because Racecar.
|
|
The Following User Says Thank You to Tcoat For This Useful Post: | jcw99 (05-04-2020) |
05-04-2020, 08:40 AM | #8 | |
Member
Join Date: May 2020
Drives: 86
Location: NSFW
Posts: 14
Thanks: 1
Thanked 2 Times in 2 Posts
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
|
Quote:
Cooling mods like radiator & oil cooler, suspensions, brake, fluids. Nothing to increase stock engine output. |
|
05-04-2020, 08:47 AM | #9 |
Senior Member
Join Date: Jul 2014
Drives: 2020 Hakone
Location: London, Ont
Posts: 69,845
Thanks: 61,656
Thanked 108,286 Times in 46,456 Posts
Mentioned: 2495 Post(s)
Tagged: 50 Thread(s)
|
The only thing that has me really questioning valve spring issues is that they usually show up at higher RPMs but you said it is mostly at lower.
__________________
Racecar spelled backwards is Racecar, because Racecar.
|
05-04-2020, 08:48 AM | #10 |
Member
Join Date: May 2020
Drives: 86
Location: NSFW
Posts: 14
Thanks: 1
Thanked 2 Times in 2 Posts
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
|
|
05-04-2020, 08:52 AM | #11 |
Member
Join Date: May 2020
Drives: 86
Location: NSFW
Posts: 14
Thanks: 1
Thanked 2 Times in 2 Posts
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
|
When you say it shows up at higher RPM, does that mean that the misfiring should have started only at high RPMs? or just the symptoms (strange noises as you mentioned)
|
05-04-2020, 09:08 AM | #12 |
Senior Member
Join Date: Jan 2018
Drives: 2013 frs red
Location: South Florida
Posts: 3,517
Thanks: 2,520
Thanked 3,089 Times in 1,654 Posts
Mentioned: 6 Post(s)
Tagged: 1 Thread(s)
|
Valve springs generally fail at high rpm when they're under stress but a flawed or overworked spring can fail anytime regardless of rpm.
|
05-04-2020, 09:12 AM | #13 |
Member
Join Date: May 2020
Drives: 86
Location: NSFW
Posts: 14
Thanks: 1
Thanked 2 Times in 2 Posts
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
|
|
The Following User Says Thank You to Pil For This Useful Post: | Lantanafrs2 (05-04-2020) |
05-04-2020, 09:42 AM | #14 |
Senior Member
Join Date: Jun 2012
Drives: '13 BRZ TLM Spec
Location: Florida
Posts: 1,963
Thanks: 1,612
Thanked 2,336 Times in 1,002 Posts
Mentioned: 115 Post(s)
Tagged: 0 Thread(s)
|
How many miles on the car? Any chance of carbon buildup causing valves to not seat?
__________________
2013 BRZ Premium 6MT - Track Car, 2020 GMC Canyon Denali Duramax - Tow Vehicle, 2021 Forester Sport - Wife's Daily, 2016 Crosstrek - Daughter's Ride and always buying random flips...
|
|
|
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Possible recall on the 86 regarding valve spring | tanner | CANADA | 84 | 11-28-2019 09:32 PM |
Valve float after valve spring recall | mswbrz | Issues | Warranty | Recalls / TSB | 5 | 11-22-2019 07:03 PM |
Valve spring recall | meadowz06 | Issues | Warranty | Recalls / TSB | 115 | 06-08-2019 11:38 PM |
valve spring issue? | nikitopo | Issues | Warranty | Recalls / TSB | 1037 | 05-01-2019 10:55 PM |
Valve Spring Recall | venturaII | New England | 13 | 02-25-2019 07:41 PM |