rattling noise under valve cover - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

drftr68 · 11-30-2006, 10:58 AM

i have a huge rattling noise under the valve cover of my sr20det and i cant figure out what it is. ive checked the oil and when i took the cover off all the rocker arms and the cam shafts were bolted down tight so nothing was loose.

ladiesman8527 · 11-30-2006, 11:03 AM

possibly the timing chain? maybe u need to replace the tensioner(s)

axiomatik · 11-30-2006, 11:52 AM

are you sure it is coming from under the valve cover? the SR fuel injectors are pretty noisy.

ScottMan · 11-30-2006, 12:19 PM

^That's what mine was. I thought it was the upper timing chain guides and it turns out it wasn't. Grab a long handled screw driver and place the end of the handle against your ear, then place the tip of the screwdriver on the injectors and the valve cover. You'll hear exactly which one is making the noise.

drftr68 · 11-30-2006, 10:42 PM

no its coming closer from the back of the engine and i know its not the fuel injectors bc i know what they sound like

**mrmephistopheles** · 11-30-2006, 11:57 PM

detonation perhaps?

ladiesman8527 · 12-01-2006, 08:48 AM

could also be noisy lifters.

insanequickness · 12-01-2006, 09:04 AM

lifters or chain guide.

11-30-2006, 10:58 AM	#1
drftr68 Join Date: Nov 2006 Location: brentwood, tn Age: 32 Posts: 33 Trader Rating: (0) Feedback Score: 0 reviews	rattling noise under valve cover i have a huge rattling noise under the valve cover of my sr20det and i cant figure out what it is. ive checked the oil and when i took the cover off all the rocker arms and the cam shafts were bolted down tight so nothing was loose.

11-30-2006, 11:52 AM	#3
axiomatik Post Whore! Join Date: Dec 2003 Location: ATL Posts: 4,697 Trader Rating: (0) Feedback Score: 0 reviews	are you sure it is coming from under the valve cover? the SR fuel injectors are pretty noisy. __________________

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11-30-2006, 11:03 AM	#2
ladiesman8527 Zilvia Junkie Join Date: Dec 2005 Location: Collierville, TN Age: 34 Posts: 429 Trader Rating: (0) Feedback Score: 0 reviews	possibly the timing chain? maybe u need to replace the tensioner(s)

11-30-2006, 12:19 PM	#4
ScottMan Zilvia Junkie Join Date: Jun 2004 Location: Athens, GA Age: 39 Posts: 373 Trader Rating: (0) Feedback Score: 0 reviews	^That's what mine was. I thought it was the upper timing chain guides and it turns out it wasn't. Grab a long handled screw driver and place the end of the handle against your ear, then place the tip of the screwdriver on the injectors and the valve cover. You'll hear exactly which one is making the noise.

11-30-2006, 10:42 PM	#5
drftr68 Join Date: Nov 2006 Location: brentwood, tn Age: 32 Posts: 33 Trader Rating: (0) Feedback Score: 0 reviews	no its coming closer from the back of the engine and i know its not the fuel injectors bc i know what they sound like

12-01-2006, 08:48 AM	#7
ladiesman8527 Zilvia Junkie Join Date: Dec 2005 Location: Collierville, TN Age: 34 Posts: 429 Trader Rating: (0) Feedback Score: 0 reviews	could also be noisy lifters.

12-01-2006, 09:04 AM	#8
insanequickness BANNED Join Date: Nov 2006 Location: dirty south Age: 42 Posts: 14 Trader Rating: (0) Feedback Score: 0 reviews	lifters or chain guide.