engine ticking noise at idle - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

fog · 11-02-2020, 07:03 AM

Hi all, recently I've been getting this constant ticking noise at idle. Can't really tell if its present above idle as I have an aftermarket exhaust.

Doing some research such as this thread I'm really hoping that it's not rocker arm failure. However, that thread the ticking seems far more intense. Anyone had this sort of noise before/any indication of what it could be? It doesn't really sound similar to the DI crickets. It's a MY14 which I've read pre-15's have some problems with rocker arms

BigTuna · 11-02-2020, 10:47 AM

Sounds normal to me

Tcoat · 11-02-2020, 11:08 AM

Quote:

Originally Posted by BigTuna

Sounds normal to me

Yep me too.
I would be much more worried if mine stopped making those sounds!

JesseG · 11-02-2020, 11:24 AM

The crickets are very distinctive sounding, which btw they are back with me, I almost missed them

OP, did your car have the valve spring recall?

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Tcoat · 11-02-2020, 12:37 PM

Quote:

Originally Posted by JesseG

The crickets are very distinctive sounding, which btw they are back with me, I almost missed them

OP, did your car have the valve spring recall?

Sent from my iPhone using Tapatalk

His info say it is a 2014 so no.

humfrz · 11-02-2020, 12:45 PM

Agreed, sounds normal.

I reckon it's just the valve lifters indicating that they have some clearance - which is a good thing.

Back in the day, with solid lifters, if you didn't have that sound after you adjusted the valves, it usually meant that they were adjusted to tight and one could expect some burnt valves on down the road.

NoHaveMSG · 11-02-2020, 04:20 PM

Quote:

Originally Posted by humfrz

Agreed, sounds normal.

I reckon it's just the valve lifters indicating that they have some clearance - which is a good thing.

Back in the day, with solid lifters, if you didn't have that sound after you adjusted the valves, it usually meant that they were adjusted to tight and one could expect some burnt valves on down the road.

The rocker pivots are solid. They are not lifters...kinda. Valve lash is a bucket that goes over the top of the end of the valve stem. You swap out different sized ones to set valve lash.

The rocker pivot sits in an oil galley in the head. One end of the rocker arm sits on the pivot, the other end sits on the top of the valve stem with the bucket lash adjuster in between. There is a roller in the center of the rocker which is driven by the cam.

Most noise that we hear is either the DI injectors firing, or the HP fuel pump. The HP fuel pump is to the right of the oil filter(if you are facing the engine bay from the front) and is driven by 3 lobes on the intake cam. If you set your hand on it with at an idle it pulses.

Rocker failure will always throw a code for a miss fire. That is if the rest of the engine doesn't let go in the process.

JesseG · 11-02-2020, 04:28 PM

Quote:

Originally Posted by Tcoat

His info say it is a 2014 so no.

Ahhh ok, I thought maybe the recall extended into 2014 MY’s

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humfrz · 11-02-2020, 05:40 PM

Quote:

Originally Posted by NoHaveMSG

The rocker pivots are solid. They are not lifters...kinda. Valve lash is a bucket that goes over the top of the end of the valve stem. You swap out different sized ones to set valve lash.

The rocker pivot sits in an oil galley in the head. One end of the rocker arm sits on the pivot, the other end sits on the top of the valve stem with the bucket lash adjuster in between. There is a roller in the center of the rocker which is driven by the cam.

Most noise that we hear is either the DI injectors firing, or the HP fuel pump. The HP fuel pump is to the right of the oil filter(if you are facing the engine bay from the front) and is driven by 3 lobes on the intake cam. If you set your hand on it with at an idle it pulses.

Rocker failure will always throw a code for a miss fire. That is if the rest of the engine doesn't let go in the process.

Good clarification -

I reckon I got lost back in the old days when most gasoline engines had either "solid" lifters or "hydrolytic" lifters - or at least that's what we called them. Or at least that's what Bubba and I called them.

NOW, I can go take a peaceful nap because at least I know what I was talken about.

ZZZZZZZZZZZZZ

Tcoat · 11-02-2020, 06:01 PM

Quote:

Originally Posted by JesseG

Ahhh ok, I thought maybe the recall extended into 2014 MY’s

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It doesn't ever cover all of the 13s. Just one run of them.

fog · 11-02-2020, 08:05 PM

Quote:

Originally Posted by JesseG

The crickets are very distinctive sounding, which btw they are back with me, I almost missed them

OP, did your car have the valve spring recall?

Sent from my iPhone using Tapatalk

Nah specifically went for the 2014 and checked the VIN to make sure it avoided the recall.

fog · 11-02-2020, 08:07 PM

Ok thanks everyone, seems the consensus is that the sound is normal. It's just that it was never there before and only started recently.

NoHaveMSG · 11-02-2020, 08:19 PM

Quote:

Originally Posted by fog

Ok thanks everyone, seems the consensus is that the sound is normal. It's just that it was never there before and only started recently.

Rocker geometry was improved in MY14 and up. The pocket for the rocker pivot is deeper, valve stem is longer.

Capt Spaulding · 11-02-2020, 08:51 PM

Quote:

Originally Posted by humfrz

Agreed, sounds normal.

I reckon it's just the valve lifters indicating that they have some clearance - which is a good thing.

Back in the day, with solid lifters, if you didn't have that sound after you adjusted the valves, it usually meant that they were adjusted to tight and one could expect some burnt valves on down the road.

Tappy valves wuz happy valves.

11-02-2020, 10:47 AM	#2
BigTuna Senior Member Join Date: Jun 2015 Drives: 2013 WRB BRZ Location: Ohio Posts: 672 Thanks: 258 Thanked 477 Times in 275 Posts Mentioned: 4 Post(s) Tagged: 0 Thread(s)	Sounds normal to me __________________ 2013 WRB "Build" Thread

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11-02-2020, 11:24 AM	#4
JesseG Senior Member Join Date: Aug 2019 Drives: 2016 Scion FR-S Location: Dallas Posts: 806 Thanks: 2,685 Thanked 393 Times in 266 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	The crickets are very distinctive sounding, which btw they are back with me, I almost missed them OP, did your car have the valve spring recall? Sent from my iPhone using Tapatalk

11-02-2020, 12:45 PM	#6
humfrz Senior Member Join Date: May 2013 Drives: 2013 FR-S, white, MT Location: Puyallup, WA Posts: 30,409 Thanks: 29,794 Thanked 32,812 Times in 16,830 Posts Mentioned: 715 Post(s) Tagged: 2 Thread(s)	Agreed, sounds normal. I reckon it's just the valve lifters indicating that they have some clearance - which is a good thing. Back in the day, with solid lifters, if you didn't have that sound after you adjusted the valves, it usually meant that they were adjusted to tight and one could expect some burnt valves on down the road.

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