Slight vibration/shaking on idle after fixing some leaks - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Gtouma · 04-02-2020, 02:47 PM

Hello,

I recently fixed the leaks of the Cylinder head , camshaft housing and cap (driver side ) by removing the engine then dismantling the parts along with the timing cover and chain ,

We placed all the parts correctly even i have replaced the spark plugs , new engine/ transmission mounts with new ones,

However now there is a light vibration which is exactly the same to the typical cold start vibration but it doesn't go away even if the car gets warm,

There is no CEL or error codes and the car drives normally fine ( i have been driving for around 1500km) and RPM is stable on idle the car just shakes ,

I have doubled checked if everything was installed correctly like all sensors , timing chain, wiring and solenoids ect. , but the issue is still there,

2013 stock manual transmission
driven 75,000KM

Please i need your support,

Thank you

p1l0t · 04-02-2020, 03:12 PM

If you are super confident about the internal work then maybe it's the mounts?

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Gtouma · 04-02-2020, 06:10 PM

I have changed the mounts to new ones ��
Is it the timing chain ? But an CEL would come out ?

p1l0t · 04-02-2020, 08:09 PM

That's what I'm saying though in a modern car with no CELs the culprit to me would be the mounts. Did you scan for pending codes?

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humfrz · 04-02-2020, 09:30 PM

Welcome to our forum -

Did you replace the motor mounts with OEM mounts or some after market mounts that you might as well have welded the engine to the frame?

If so, like ol @p1l0t eluded to, you might consider checking the mounts and make sure you didn't put them in on the wrong side or upside down or backwards or tightened them up too tight of not tight enough.

Gtouma · 04-03-2020, 08:16 AM

Thank you for the replies,

Yes i have doubled checked if the mounts are placed correctly and even scanned the car couple of times and no errors appeared 😭

humfrz · 04-03-2020, 05:42 PM

hmmm.....OK, let's check in with @steve99 , he is pretty smart about these things -

steve99 · 04-06-2020, 07:11 AM

Do you have a diagnostic tool that can monitor AFR fuel trims intake mabifold pressure\vaccuum and possibly intake and exhaust cam timing.

Id check carefully for intake or exhaist leaks as well, but i suspect it may be an assembly issue like cam sprokets one tooth out or similar.

04-02-2020, 02:47 PM	#1
Gtouma Junior Member Join Date: Apr 2020 Drives: Gt86 2013 Location: Dubai Posts: 4 Thanks: 0 Thanked 2 Times in 1 Post Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Slight vibration/shaking on idle after fixing some leaks Hello, I recently fixed the leaks of the Cylinder head , camshaft housing and cap (driver side ) by removing the engine then dismantling the parts along with the timing cover and chain , We placed all the parts correctly even i have replaced the spark plugs , new engine/ transmission mounts with new ones, However now there is a light vibration which is exactly the same to the typical cold start vibration but it doesn't go away even if the car gets warm, There is no CEL or error codes and the car drives normally fine ( i have been driving for around 1500km) and RPM is stable on idle the car just shakes , I have doubled checked if everything was installed correctly like all sensors , timing chain, wiring and solenoids ect. , but the issue is still there, 2013 stock manual transmission driven 75,000KM Please i need your support, Thank you Last edited by Gtouma; 04-02-2020 at 06:13 PM.

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04-02-2020, 03:12 PM	#2
p1l0t Senior Member Join Date: Jan 2016 Drives: 2016 Subaru BRZ Hyperblue Location: West Hartford, CT Posts: 8,424 Thanks: 22,601 Thanked 9,392 Times in 4,818 Posts Mentioned: 58 Post(s) Tagged: 1 Thread(s)	If you are super confident about the internal work then maybe it's the mounts? Sent from my SM-G975U using Tapatalk

04-02-2020, 06:10 PM	#3
Gtouma Junior Member Join Date: Apr 2020 Drives: Gt86 2013 Location: Dubai Posts: 4 Thanks: 0 Thanked 2 Times in 1 Post Mentioned: 0 Post(s) Tagged: 0 Thread(s)	I have changed the mounts to new ones �� Is it the timing chain ? But an CEL would come out ?

04-02-2020, 08:09 PM	#4
p1l0t Senior Member Join Date: Jan 2016 Drives: 2016 Subaru BRZ Hyperblue Location: West Hartford, CT Posts: 8,424 Thanks: 22,601 Thanked 9,392 Times in 4,818 Posts Mentioned: 58 Post(s) Tagged: 1 Thread(s)	That's what I'm saying though in a modern car with no CELs the culprit to me would be the mounts. Did you scan for pending codes? Sent from my SM-G975U using Tapatalk

04-02-2020, 09:30 PM	#5
humfrz Senior Member Join Date: May 2013 Drives: 2013 FR-S, white, MT Location: Puyallup, WA Posts: 30,138 Thanks: 29,275 Thanked 32,296 Times in 16,620 Posts Mentioned: 709 Post(s) Tagged: 2 Thread(s)	Welcome to our forum - Did you replace the motor mounts with OEM mounts or some after market mounts that you might as well have welded the engine to the frame? If so, like ol @p1l0t eluded to, you might consider checking the mounts and make sure you didn't put them in on the wrong side or upside down or backwards or tightened them up too tight of not tight enough.

04-03-2020, 08:16 AM	#6
Gtouma Junior Member Join Date: Apr 2020 Drives: Gt86 2013 Location: Dubai Posts: 4 Thanks: 0 Thanked 2 Times in 1 Post Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Thank you for the replies, Yes i have doubled checked if the mounts are placed correctly and even scanned the car couple of times and no errors appeared 😭

04-03-2020, 05:42 PM	#7
humfrz Senior Member Join Date: May 2013 Drives: 2013 FR-S, white, MT Location: Puyallup, WA Posts: 30,138 Thanks: 29,275 Thanked 32,296 Times in 16,620 Posts Mentioned: 709 Post(s) Tagged: 2 Thread(s)	hmmm.....OK, let's check in with @steve99 , he is pretty smart about these things -

04-06-2020, 07:11 AM	#8
steve99 Banned Join Date: Dec 2013 Drives: FT86 Location: Australia Posts: 7,998 Thanks: 1,035 Thanked 4,988 Times in 2,982 Posts Mentioned: 598 Post(s) Tagged: 2 Thread(s)	Do you have a diagnostic tool that can monitor AFR fuel trims intake mabifold pressure\vaccuum and possibly intake and exhaust cam timing. Id check carefully for intake or exhaist leaks as well, but i suspect it may be an assembly issue like cam sprokets one tooth out or similar.

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