Engine ticking permanently after hard acceleration

JagerMan · 08-14-2016, 06:53 PM

Hello, when I bought the car, I'm using Royal Purple 5w30 engine oil and K and N oil filter. I'm using Exxon Premium gasoline.

The engine was smooth until today.

I did a W.O.T hard acceleration when passing a semi-truck on a 2-lane highway.

Now I can hear a small ping/knocking sound especially during idle and soft acceleration.

Did I mess up the valve train or something? Oil is still full.

Thanks.

barncobob · 08-14-2016, 07:06 PM

maybe gas related? id drive with old gas and fill up at a station(top tier) that is busy to get fresh gas,,,,,or drain oil with something other than whats in there,,just a thought..

POS VETT · 08-14-2016, 07:07 PM

Can you take off the spark plugs and examine them?

Chan Chee Hoe · 08-14-2016, 07:26 PM

Maybe the W.O.T. 'blew' of the Carbon from the intake valves,make it less cushion between the Seats.?[just joking].

jaedub · 08-14-2016, 07:37 PM

How violent is the knock? Does it only occur during idle/soft acceleration? Does the knock stop if you press down on your clutch during idle? (If you have MT)

SouthArk370Z · 08-14-2016, 08:27 PM

If it's a "light" tick, probably normal. I'd try barncobob's suggestion and put some fresh gas in the tank. If that doesn't help, I'd try the Nissan ester oil - it's supposed to quiet the noisy Z valve train.

If it's more like a knock, I'd get a mechanic to look at it ASAP.

barncobob · 08-14-2016, 09:29 PM

my 16, did Niss ester oil at 1200 till 4200 miles, then changed to Redline 5w/30.. I don't hear ANY valve train noise at all..now

Dreadnaught · 08-14-2016, 09:56 PM

When I first bought my Z I heard a slight ticking noise coming from under the hood at the rear of the right cylinder head. I thought I had a valve train issue until I discovered it was the purge control valve letting in fuel vapor into the engine from the fuel tank. At idle it sounds in rhythm with the RPM's. When you hear the noise open the hood and see if the noise is coming from the rear of the right cylinder head. If so, turn the engine off, then start it again and see if the noise goes away. I noticed if you shut the car off if the purge control valve is ticking/operating and start the engine the purge control valve shuts off.

JagerMan · 08-16-2016, 08:47 PM

Quote:

Originally Posted by barncobob

maybe gas related? id drive with old gas and fill up at a station(top tier) that is busy to get fresh gas,,,,,or drain oil with something other than whats in there,,just a thought..

I go to a busy Exxon station. Exxon Premium fuel is top tier. The problems happened after I passed that truck.

Quote:

Originally Posted by jaedub

How violent is the knock? Does it only occur during idle/soft acceleration? Does the knock stop if you press down on your clutch during idle? (If you have MT)

Not a knock but a little ticking noise. I can hear it on idle and soft acceleration. I cannot hear it when I go faster because of road noise. I have automatic.

Quote:

Originally Posted by SouthArk370Z

If it's a "light" tick, probably normal. I'd try barncobob's suggestion and put some fresh gas in the tank. If that doesn't help, I'd try the Nissan ester oil - it's supposed to quiet the noisy Z valve train.

If it's more like a knock, I'd get a mechanic to look at it ASAP.

This time I put fresh Shell gasoline (Top tier) and drove 50 miles. still pings/ticks/knocks. I've used Mobil 1, Royal Purple, and Valvoline Synpower with K and N oil filter. No noise until after I passed that darn truck.

My vehicle does not burn any oil and it is always full. I check it 3 times a week.

Quote:

Originally Posted by Dreadnaught

When I first bought my Z I heard a slight ticking noise coming from under the hood at the rear of the right cylinder head. I thought I had a valve train issue until I discovered it was the purge control valve letting in fuel vapor into the engine from the fuel tank. At idle it sounds in rhythm with the RPM's. When you hear the noise open the hood and see if the noise is coming from the rear of the right cylinder head. If so, turn the engine off, then start it again and see if the noise goes away. I noticed if you shut the car off if the purge control valve is ticking/operating and start the engine the purge control valve shuts off.

Will do this week. thanks.

JagerMan · 09-13-2016, 01:28 PM

Interesting. The knocking stopped when outside temperature went below 70 degrees.

edub370 · 09-14-2016, 04:27 PM

ticky valvetrain isn't uncommon on a lot of vehicles

JARblue · 09-15-2016, 10:02 AM

I had a tech a NTB tell me I should have my engine looked at because I was getting "spark knock"

Of course, he was simply referring to the VVEL chatter that is prevalent on these cars. I told him to stick to tires and batteries

08-14-2016, 06:53 PM	#1 (permalink)
JagerMan Base Member Join Date: Jun 2016 Location: Illinois Posts: 10 Drives: 2013 370z Rep Power: 62	Engine ticking permanently after hard acceleration Hello, when I bought the car, I'm using Royal Purple 5w30 engine oil and K and N oil filter. I'm using Exxon Premium gasoline. The engine was smooth until today. I did a W.O.T hard acceleration when passing a semi-truck on a 2-lane highway. Now I can hear a small ping/knocking sound especially during idle and soft acceleration. Did I mess up the valve train or something? Oil is still full. Thanks.

08-14-2016, 08:27 PM	#6 (permalink)
SouthArk370Z Premium Member Join Date: Nov 2010 Location: South Arkansas Posts: 8,435 Drives: 2014 Challenger Rep Power: 324198	If it's a "light" tick, probably normal. I'd try barncobob's suggestion and put some fresh gas in the tank. If that doesn't help, I'd try the Nissan ester oil - it's supposed to quiet the noisy Z valve train. If it's more like a knock, I'd get a mechanic to look at it ASAP. onzedge likes this. __________________ Steering Lock Links - Search The370Z Bookmarklet - FSM @ NICOclub Mankind has progressed past the need for war but we haven't evolved that far. - NachoMahma

08-14-2016, 09:29 PM	#7 (permalink)
barncobob A True Z Fanatic Join Date: Sep 2015 Location: hangtown, CA Posts: 1,164 Drives: 16 370Z auto Rep Power: 590	my 16, did Niss ester oil at 1200 till 4200 miles, then changed to Redline 5w/30.. I don't hear ANY valve train noise at all..now onzedge likes this.

08-14-2016, 09:56 PM	#8 (permalink)
Dreadnaught Track Member Join Date: Dec 2009 Location: Farmington, Utah Posts: 582 Drives: 14 SR 370z 6MT Rep Power: 10139	When I first bought my Z I heard a slight ticking noise coming from under the hood at the rear of the right cylinder head. I thought I had a valve train issue until I discovered it was the purge control valve letting in fuel vapor into the engine from the fuel tank. At idle it sounds in rhythm with the RPM's. When you hear the noise open the hood and see if the noise is coming from the rear of the right cylinder head. If so, turn the engine off, then start it again and see if the noise goes away. I noticed if you shut the car off if the purge control valve is ticking/operating and start the engine the purge control valve shuts off. __________________ Ford Diesel and Heavy Line Technician at your service. Last edited by Dreadnaught; 08-15-2016 at 08:27 PM.

09-14-2016, 04:27 PM	#11 (permalink)
edub370 A True Z Fanatic Join Date: May 2011 Location: KCMO Posts: 3,458 Drives: 09 370z S/T 6MT Rep Power: 20	ticky valvetrain isn't uncommon on a lot of vehicles __________________ 09 370Z ST 6MT//Injen CAI//Greddy CBE//TP//TSW's//Swifts//Stillen lip//Whiteline sways 326whp/268tq

08-14-2016, 07:06 PM	#2 (permalink)
barncobob A True Z Fanatic Join Date: Sep 2015 Location: hangtown, CA Posts: 1,164 Drives: 16 370Z auto Rep Power: 590	maybe gas related? id drive with old gas and fill up at a station(top tier) that is busy to get fresh gas,,,,,or drain oil with something other than whats in there,,just a thought..

08-14-2016, 07:07 PM	#3 (permalink)
POS VETT Track Member Join Date: Apr 2015 Location: Columbus OH Posts: 612 Drives: Z34\|C4LT4\|C6Z06\|V25 Rep Power: 3366	Can you take off the spark plugs and examine them?

08-14-2016, 07:26 PM	#4 (permalink)
Chan Chee Hoe Track Member Join Date: Mar 2009 Location: Singapore Posts: 861 Drives: 370z,Yellow,7sp A Rep Power: 17	Maybe the W.O.T. 'blew' of the Carbon from the intake valves,make it less cushion between the Seats.?[just joking].

08-14-2016, 07:37 PM	#5 (permalink)
jaedub Track Member Join Date: Aug 2010 Location: Los Angeles Posts: 906 Drives: 2010 Black 370Z MT Rep Power: 305	How violent is the knock? Does it only occur during idle/soft acceleration? Does the knock stop if you press down on your clutch during idle? (If you have MT)

09-13-2016, 01:28 PM	#10 (permalink)
JagerMan Base Member Join Date: Jun 2016 Location: Illinois Posts: 10 Drives: 2013 370z Rep Power: 62	Interesting. The knocking stopped when outside temperature went below 70 degrees.

09-15-2016, 10:02 AM	#12 (permalink)
JARblue A True Z Fanatic Join Date: Mar 2011 Location: Austin, TX Age: 43 Posts: 36,450 Drives: 11 Z34, 98 E36 M3 Rep Power: 2684440	I had a tech a NTB tell me I should have my engine looked at because I was getting "spark knock" Of course, he was simply referring to the VVEL chatter that is prevalent on these cars. I told him to stick to tires and batteries __________________ 2011 370Z 6MT Sport Gun Metallic \| ARC \| CJM \| Ecutek \| FI \| Fujimura \| R2C \| SPL \| Stillen \| TWM \| Z1 \| ZSpeed \|

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