Spark Knock noise?

TedB370z · 03-04-2014, 01:58 PM

Update:

I pressure tested the intakes/plenum and found a leak, it was the passenger side breather that goes to the valve cover (I have K&N Typhoon Intakes) Needed some thread seal tape. Also looked at other K&N installs, and the previous owner left on the baffles/sound dampeners, which after reading the installation instructions I downloaded, K&N says to remove, so those are gone, ordered the z1 motorsports replacements.

Changed the oil with Mobil 1 Synthetic 5w30 (I was using conventional 5w30 the last 2 oil changes since I got the Z) and the violent valve/chain/whatever noise now rarely happens, as does the slight hesitation related to it. I'm wondering if the hydraulic chain tensioner was stuck from the thicker oil, causing the chain to slack and the timing go goofy?

I still have the odd issue of when I'm accelerating at a normal pace (not WOT) it'll just drop RPMs like before, but not as drastic as before I fixed the intake leak, only 200 - 300RPM.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Go Canelo! Knock Mayweather out!!	gussyturbo z	Sports	3	09-15-2013 06:45 AM
[FOR SALE] CA: 09+ 370z OEM Knock Sensor	J2FRESH	Parts for sale (Private Classifieds)	0	05-08-2012 01:05 PM
Light engine pinging/knock	bigrob126	Engine & Drivetrain	4	08-20-2011 07:49 AM
knock on startup	Daishi	Engine & Drivetrain	16	12-19-2010 09:41 PM
Knock from the clutch pedal	Oscar135	Engine & Drivetrain	34	07-27-2010 12:10 PM

03-04-2014, 01:58 PM	#22 (permalink)
TedB370z Base Member Join Date: Aug 2013 Location: Pittsburgh, PA Posts: 87 Drives: 09 Nissan 370z Rep Power: 12	Update: I pressure tested the intakes/plenum and found a leak, it was the passenger side breather that goes to the valve cover (I have K&N Typhoon Intakes) Needed some thread seal tape. Also looked at other K&N installs, and the previous owner left on the baffles/sound dampeners, which after reading the installation instructions I downloaded, K&N says to remove, so those are gone, ordered the z1 motorsports replacements. Changed the oil with Mobil 1 Synthetic 5w30 (I was using conventional 5w30 the last 2 oil changes since I got the Z) and the violent valve/chain/whatever noise now rarely happens, as does the slight hesitation related to it. I'm wondering if the hydraulic chain tensioner was stuck from the thicker oil, causing the chain to slack and the timing go goofy? I still have the odd issue of when I'm accelerating at a normal pace (not WOT) it'll just drop RPMs like before, but not as drastic as before I fixed the intake leak, only 200 - 300RPM.