engine noise - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

drftkng951 · 10-23-2009, 11:27 PM

so lately i have been hearing a noise coming from my engine bay. i have 91 fastback with a 95 ka in it.
this noise is deffinately only under load when i'm driving with half or more than half throttle. i have revved the motor at idle and the noise isn't there. sounds like a rock or something really loose rattling in the engine compartment.

any help would be appreciated

evolvedgs3 · 10-23-2009, 11:42 PM

pull the head and inspect your jacked up piston (or skirt).

holybushoffire · 10-23-2009, 11:44 PM

Before hand you could do a compression test and see what your numbers are. You should have severely low numbers in one cylinder.

drftkng951 · 10-24-2009, 12:06 AM

well i pulled the wire on each piston but it passed, i know that doesn't count for much.
is there a way to narrow if it is even piston?

evolvedgs3 · 10-31-2009, 01:40 AM

Dear god,,,,,,

Pull the damn spark plug and run a compression check on each cyl. to see if there is an issue with the piston or rings.

Google home compression check to see what to do.

sidewaysonmy180 · 10-31-2009, 04:18 AM

or it could just be the chain guide. if you dont here it while idling. just pull the cover off. new gasket in hand. and youll see a piece of metal right over your chain unscrew it and throw it away dont put the screws back in throw those away too. happens to most kade. mine did it. only on freeway on ramps that had an upwared slope though.

mxexux · 10-31-2009, 05:26 AM

Sounds like it might be detonation if its only under load. Does it sound like a ping pong ball is bouncing around in your engine bay?

drftkng951 · 11-12-2009, 08:46 PM

still waiting to get a compression tester

10-23-2009, 11:27 PM	#1
drftkng951 Zilvia Junkie Join Date: Sep 2007 Location: Riverside,CA Age: 36 Posts: 529 Trader Rating: (6) Feedback Score: 6 reviews	engine noise so lately i have been hearing a noise coming from my engine bay. i have 91 fastback with a 95 ka in it. this noise is deffinately only under load when i'm driving with half or more than half throttle. i have revved the motor at idle and the noise isn't there. sounds like a rock or something really loose rattling in the engine compartment. any help would be appreciated __________________ J.SUN

10-23-2009, 11:44 PM	#3
holybushoffire Zilvia Junkie Join Date: Jul 2005 Location: NorCal Posts: 580 Trader Rating: (5) Feedback Score: 5 reviews	Before hand you could do a compression test and see what your numbers are. You should have severely low numbers in one cylinder. __________________ "I am not good English, I like the drift" CHINA DRIFT "some guys have a better relationship with their car than their wife haha. sad but true." SECRET SOCIETY

10-24-2009, 12:06 AM	#4
drftkng951 Zilvia Junkie Join Date: Sep 2007 Location: Riverside,CA Age: 36 Posts: 529 Trader Rating: (6) Feedback Score: 6 reviews	well i pulled the wire on each piston but it passed, i know that doesn't count for much. is there a way to narrow if it is even piston? __________________ J.SUN

10-23-2009, 11:42 PM	#2
evolvedgs3 Join Date: Jun 2009 Location: Twentynine Palms CA Age: 46 Posts: 47 Trader Rating: (6) Feedback Score: 6 reviews	pull the head and inspect your jacked up piston (or skirt).

10-31-2009, 01:40 AM	#5
evolvedgs3 Join Date: Jun 2009 Location: Twentynine Palms CA Age: 46 Posts: 47 Trader Rating: (6) Feedback Score: 6 reviews	Dear god,,,,,, Pull the damn spark plug and run a compression check on each cyl. to see if there is an issue with the piston or rings. Google home compression check to see what to do.

10-31-2009, 04:18 AM	#6
sidewaysonmy180 Zilvia Member Join Date: Apr 2009 Location: NoHo Age: 39 Posts: 154 Trader Rating: (4) Feedback Score: 4 reviews	or it could just be the chain guide. if you dont here it while idling. just pull the cover off. new gasket in hand. and youll see a piece of metal right over your chain unscrew it and throw it away dont put the screws back in throw those away too. happens to most kade. mine did it. only on freeway on ramps that had an upwared slope though.

10-31-2009, 05:26 AM	#7
mxexux Zilvia Junkie Join Date: Jun 2008 Location: SoCal 949 Posts: 363 Trader Rating: (9) Feedback Score: 9 reviews	Sounds like it might be detonation if its only under load. Does it sound like a ping pong ball is bouncing around in your engine bay?

11-12-2009, 08:46 PM	#8
drftkng951 Zilvia Junkie Join Date: Sep 2007 Location: Riverside,CA Age: 36 Posts: 529 Trader Rating: (6) Feedback Score: 6 reviews	still waiting to get a compression tester