should i be worried about small amounts of knock? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Basket Case · 04-18-2014, 03:17 PM

I live in florida, the land of the flat...Every once in a while when i am not paying attention and i go up a really steep drive, or try and make a u turn on a steep driveway and just give it a lithe gas i have noticed a little knock

. I have only noticed this twice thank goodness. Do i need to be worried about the affect of that? This isn't something that happens often. I guess sometimes i just forget I have no torque since i drove a mustang for so long...

J_kennington · 04-18-2014, 03:51 PM

Is it knock, or is it the LSD kicking in? From what your describing, sounds more like your LSD...

raven1231 · 04-18-2014, 03:56 PM

If it is indeed knock then yes worry away

8R6 · 04-18-2014, 04:00 PM

Quote:

Originally Posted by J_kennington

Is it knock, or is it the LSD kicking in? From what your describing, sounds more like your LSD...

this.

tahdizzle · 04-18-2014, 04:02 PM

Nah. If you are worried about Knocks, just ask them if they are or not.

frsvr4 · 04-18-2014, 04:02 PM

So, you think you hear it? Or are you logging it?

Those don't sound like scenarios that will produce knock. Brief acceleration just doesn't heat anything enough to cause problems from what I've seen. It's WOT pulls through long gears like 3rd or higher that can produce real knock and break parts.

Basket Case · 04-18-2014, 04:20 PM

It is not the LSD, trust me I know what that feels like and sounds like...

Have any of you never let the clutch out either too slowly or too quickly with the car at a really low RPM and had it shutter and make a knocking noise? I know what knocking sounds like as I have had several bikes and cars do it in the past...

J_kennington · 04-18-2014, 05:03 PM

Quote:

Originally Posted by Basket Case

It is not the LSD, trust me I know what that feels like and sounds like...

Have any of you never let the clutch out either too slowly or too quickly with the car at a really low RPM and had it shutter and make a knocking noise? I know what knocking sounds like as I have had several bikes and cars do it in the past...

The problem is your not describing knock. Simply letting a clutch out at low rpm should not create knock inside the motor. Also, if your motor is truly knocking simply from going up a hill, there's a major problem, and no it's not "because I has no torque after driving a mustang"

Basket Case · 04-18-2014, 05:07 PM

so you are saying the knock knock knock sound i have heard twice when trying to start from a dead stop up a steep hill with probably too much clutch and not enough throttle is not knock? It doesn't sound any different then my buell trying to take off from a dead stop in traffic with too little throttle and not enough clutch...

J_kennington · 04-18-2014, 05:14 PM

So, what your saying is your dumping the clutch without the proper throttle to back it up, thereby starving the motor fuel and almost stalling the car? In that case, yes I would be concerned and learn to properly operate a manual transmission for personal safety reasons...

Either way, stalling a car is not true knock. And all you may do is burn the clutch due to improper use.

Basket Case · 04-18-2014, 05:16 PM

thats right I just don't know how to drive a manual...I have driven a manual for longer then many members on this forum have been driving cars.

J_kennington · 04-18-2014, 05:18 PM

You didn't answer the question. Are you nearly stalling the car? I'm guessing that's what you meant by "to much clutch, to little throttle". So, is that correct? Are we talking 800rpms or 200rpms when this "knock" happens?

Basket Case · 04-18-2014, 05:22 PM

Not near stalling, thats why I am thinking it is mild knocking. Although, no CEL. I am probably being paranoid, but with the DI seal failures some people have seen I am always slightly worried. I haven't seen too many threads related to that lately, which is probably a good sign.

BlaineWasHere · 04-18-2014, 05:26 PM

Quit almost stalling your car and this problem will quit happening.

04-18-2014, 03:17 PM	#1
Basket Case Senior Member Join Date: Jun 2013 Drives: 2013 Raven fr-s Location: Southwest Florida Posts: 450 Thanks: 193 Thanked 176 Times in 99 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	should i be worried about small amounts of knock? I live in florida, the land of the flat...Every once in a while when i am not paying attention and i go up a really steep drive, or try and make a u turn on a steep driveway and just give it a lithe gas i have noticed a little knock . I have only noticed this twice thank goodness. Do i need to be worried about the affect of that? This isn't something that happens often. I guess sometimes i just forget I have no torque since i drove a mustang for so long...

04-18-2014, 03:56 PM	#3
raven1231 Senior Member Join Date: Aug 2013 Drives: 2013 Firestorm FR-S, 2016 DGM WRX Location: Cincinnati, Ohio Posts: 4,580 Thanks: 8,264 Thanked 3,118 Times in 1,667 Posts Mentioned: 24 Post(s) Tagged: 1 Thread(s)	If it is indeed knock then yes worry away __________________ http://www.ft86club.com/forums/showthread.php?t=59870

04-18-2014, 04:02 PM	#6
frsvr4 Senior Member Join Date: Nov 2012 Drives: '13 FRS Location: no spoiler club Posts: 157 Thanks: 567 Thanked 53 Times in 29 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	So, you think you hear it? Or are you logging it? Those don't sound like scenarios that will produce knock. Brief acceleration just doesn't heat anything enough to cause problems from what I've seen. It's WOT pulls through long gears like 3rd or higher that can produce real knock and break parts. __________________ '13 Asphalt FR-S // 6 spd, 3M bra, BeSpoke, Sportsguy83 arm rest, YoSpeed sills & plaque, P3Cars Vent Gauge +oil P sensor; on shelf: SRP pedals '93 Pearl White 3000GT VR-4 // 5 spd, stock block & 30+ psi: 10.5@135

04-18-2014, 05:26 PM	#14
BlaineWasHere Grip>Drift Join Date: Jun 2012 Drives: FRS Location: NorCal Posts: 3,472 Thanks: 782 Thanked 1,749 Times in 918 Posts Mentioned: 53 Post(s) Tagged: 2 Thread(s)	Quit almost stalling your car and this problem will quit happening. __________________ My FR-S Build Thread!

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04-18-2014, 04:20 PM	#7
Basket Case Senior Member Join Date: Jun 2013 Drives: 2013 Raven fr-s Location: Southwest Florida Posts: 450 Thanks: 193 Thanked 176 Times in 99 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	It is not the LSD, trust me I know what that feels like and sounds like... Have any of you never let the clutch out either too slowly or too quickly with the car at a really low RPM and had it shutter and make a knocking noise? I know what knocking sounds like as I have had several bikes and cars do it in the past...

04-18-2014, 05:07 PM	#9
Basket Case Senior Member Join Date: Jun 2013 Drives: 2013 Raven fr-s Location: Southwest Florida Posts: 450 Thanks: 193 Thanked 176 Times in 99 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	so you are saying the knock knock knock sound i have heard twice when trying to start from a dead stop up a steep hill with probably too much clutch and not enough throttle is not knock? It doesn't sound any different then my buell trying to take off from a dead stop in traffic with too little throttle and not enough clutch...

04-18-2014, 05:16 PM	#11
Basket Case Senior Member Join Date: Jun 2013 Drives: 2013 Raven fr-s Location: Southwest Florida Posts: 450 Thanks: 193 Thanked 176 Times in 99 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	thats right I just don't know how to drive a manual...I have driven a manual for longer then many members on this forum have been driving cars.

04-18-2014, 05:22 PM	#13
Basket Case Senior Member Join Date: Jun 2013 Drives: 2013 Raven fr-s Location: Southwest Florida Posts: 450 Thanks: 193 Thanked 176 Times in 99 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	Not near stalling, thats why I am thinking it is mild knocking. Although, no CEL. I am probably being paranoid, but with the DI seal failures some people have seen I am always slightly worried. I haven't seen too many threads related to that lately, which is probably a good sign.

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