Help with Engine Noise Ban25's Z

Katana29 · 01-06-2022, 07:07 PM

Got a tapping sound that sounds like its from the valve train.

Location seems to be at the rear cylinder on the drivers side bank.

Rod bearings and oil system have been checked, and the valve train clearances are all around 11 thousandths between the buckets and the cams which is within spec.

Running C1 JWT cams. The car is Ban25's here on the forum.

If anybody can help or direct me to check something else I'd really appreciate it.

Thanks guys
-James

SG4247 · 01-06-2022, 09:43 PM

Lots of potential slop and noise in the VVEL system.

Might look at the VVEL actuator shaft, linkage, adjusters and rocker bushings.

Katana29 · 01-06-2022, 10:14 PM

Yeah I checked the intake cams and they seem fine, noise is definitely coming from the exhaust cam area but everything seems to be fine.

Something I'm missing with the cams or the area more towards the back of the motor maybe?

SG4247 · 01-06-2022, 11:13 PM

Exhaust leak at the header/head flange?

Seen bad welds (pin holes) on tubes to the flange joint, leak and make ticking noise also.

Katana29 · 01-07-2022, 08:11 PM

Hey yeah I checked that too. Sprayed everywhere with soapy water, no leaks of any kind. The sound is definitely metallic, a more of a tap than a tick. I'm in touch with Seb and sent him videos of the sound from different positions around the engine.

Not sure how to post them on here I'm sure it would help you guys out

SG4247 · 01-07-2022, 09:44 PM

Exhaust cam end play, wrist pin on number 6, or piston slap on number 6.

Pull the coil pack on number six and start it up. If the noise disappears, then thats not good. If the noise gets louder thsts also not good. If the tapping stays the same - then I would figure that cylinder/piston is not the problem.

Katana29 · 01-07-2022, 10:57 PM

Is there a specific way to check the end play on the cams?

Katana29 · 01-11-2022, 04:47 PM

Bump

Spooler · 01-11-2022, 05:00 PM

I seriously doubt it is the cam causing an issue. You may have something else going on that is more serious. Have you checked oil pressure? If it is low at idle you have a gallery gasket issue.

Katana29 · 01-11-2022, 11:49 PM

Oil pressure checked, plenty at idle not low at all. Walks like duck, quacks like a duck right?...

There is wear on the lobes, pics sent to JWT. You can see the rings forming on the tips.

Spooler · 01-12-2022, 09:58 AM

Quote:

Originally Posted by Katana29

Oil pressure checked, plenty at idle not low at all. Walks like duck, quacks like a duck right?...

There is wear on the lobes, pics sent to JWT. You can see the rings forming on the tips.

Post a picture. I would like to see the wear. Go to JWT C2 cams if you need too. Not sure how the Jun cams will do.

Tractionless · 01-15-2022, 09:07 AM

Quote:

Originally Posted by Katana29

Oil pressure checked, plenty at idle not low at all. Walks like duck, quacks like a duck right?...

There is wear on the lobes, pics sent to JWT. You can see the rings forming on the tips.

Lobe wear can be due to an inferior material used on the lobes commonly associated with regrinds but not unheard of with new billet units neither.

Spooler · 01-16-2022, 02:32 PM

Quote:

Originally Posted by Tractionless

Lobe wear can be due to an inferior material used on the lobes commonly associated with regrinds but not unheard of with new billet units neither.

Without pictures we can't see anything to be able to give sound advice. If he is not willing to do that, can't help him.

01-06-2022, 07:07 PM	#1 (permalink)
Katana29 Base Member Join Date: Aug 2020 Location: Florida Posts: 89 Drives: 2009 370Z Rep Power: 5	Help with Engine Noise Ban25's Z Got a tapping sound that sounds like its from the valve train. Location seems to be at the rear cylinder on the drivers side bank. Rod bearings and oil system have been checked, and the valve train clearances are all around 11 thousandths between the buckets and the cams which is within spec. Running C1 JWT cams. The car is Ban25's here on the forum. If anybody can help or direct me to check something else I'd really appreciate it. Thanks guys -James

01-06-2022, 09:43 PM	#2 (permalink)
SG4247 Track Member Join Date: Oct 2016 Location: OKC Posts: 785 Drives: 2010 touring Rep Power: 7842	Lots of potential slop and noise in the VVEL system. Might look at the VVEL actuator shaft, linkage, adjusters and rocker bushings. Katana29 likes this. __________________ NA on E85 - 12.402 @ 112 mph 100 shot E85 - 11.589 @ 117 mph JWT C2 cams rev Base Circle & Titan Valves

01-06-2022, 11:13 PM	#4 (permalink)
SG4247 Track Member Join Date: Oct 2016 Location: OKC Posts: 785 Drives: 2010 touring Rep Power: 7842	Exhaust leak at the header/head flange? Seen bad welds (pin holes) on tubes to the flange joint, leak and make ticking noise also. Katana29 likes this. __________________ NA on E85 - 12.402 @ 112 mph 100 shot E85 - 11.589 @ 117 mph JWT C2 cams rev Base Circle & Titan Valves

01-07-2022, 09:44 PM	#6 (permalink)
SG4247 Track Member Join Date: Oct 2016 Location: OKC Posts: 785 Drives: 2010 touring Rep Power: 7842	Exhaust cam end play, wrist pin on number 6, or piston slap on number 6. Pull the coil pack on number six and start it up. If the noise disappears, then thats not good. If the noise gets louder thsts also not good. If the tapping stays the same - then I would figure that cylinder/piston is not the problem. __________________ NA on E85 - 12.402 @ 112 mph 100 shot E85 - 11.589 @ 117 mph JWT C2 cams rev Base Circle & Titan Valves Last edited by SG4247; 01-08-2022 at 07:00 AM.

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01-06-2022, 10:14 PM	#3 (permalink)
Katana29 Base Member Join Date: Aug 2020 Location: Florida Posts: 89 Drives: 2009 370Z Rep Power: 5	Yeah I checked the intake cams and they seem fine, noise is definitely coming from the exhaust cam area but everything seems to be fine. Something I'm missing with the cams or the area more towards the back of the motor maybe?

01-07-2022, 08:11 PM	#5 (permalink)
Katana29 Base Member Join Date: Aug 2020 Location: Florida Posts: 89 Drives: 2009 370Z Rep Power: 5	Hey yeah I checked that too. Sprayed everywhere with soapy water, no leaks of any kind. The sound is definitely metallic, a more of a tap than a tick. I'm in touch with Seb and sent him videos of the sound from different positions around the engine. Not sure how to post them on here I'm sure it would help you guys out

01-07-2022, 10:57 PM	#7 (permalink)
Katana29 Base Member Join Date: Aug 2020 Location: Florida Posts: 89 Drives: 2009 370Z Rep Power: 5	Is there a specific way to check the end play on the cams?

01-11-2022, 04:47 PM	#8 (permalink)
Katana29 Base Member Join Date: Aug 2020 Location: Florida Posts: 89 Drives: 2009 370Z Rep Power: 5	Bump

01-11-2022, 05:00 PM	#9 (permalink)
Spooler A True Z Fanatic Join Date: Jun 2014 Location: Ga Posts: 13,797 Drives: 2013 Nismo 370z Rep Power: 2684392	I seriously doubt it is the cam causing an issue. You may have something else going on that is more serious. Have you checked oil pressure? If it is low at idle you have a gallery gasket issue.

01-11-2022, 11:49 PM	#10 (permalink)
Katana29 Base Member Join Date: Aug 2020 Location: Florida Posts: 89 Drives: 2009 370Z Rep Power: 5	Oil pressure checked, plenty at idle not low at all. Walks like duck, quacks like a duck right?... There is wear on the lobes, pics sent to JWT. You can see the rings forming on the tips.