Engine sounds loud when accelerating

General discussion forum for J30 and M30 owners!
J30boy31
Posts: 18
Joined: Mon Sep 05, 2016 9:04 pm
Car: 1994 Infiniti J30

Post

Im wondering why the engine sounds loud when i accelerate or rev past 2k? like the fan is running high or something. Can it be exhaust leak causing the sound? it only happens when im going over 2k rpms otherwise if the car is just running you dont hear it.


gsf1200s
Posts: 54
Joined: Thu Sep 26, 2013 10:21 am
Car: 1993 J30 (no longer with us)
2012 Nissan Versa
2003 Chevy Silverado
2003 Suzuki Bandit
1971 Honda CB750k1

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could be the exhaust system is wearing out. In my experience exhaust leaks usually sound like a ticking clock.

fourdrinie
Posts: 537
Joined: Thu Mar 03, 2005 8:23 am
Car: 97 J30

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if you get your car up on front wheel ramps, you'll be able to hear where it's coming from

J30boy31
Posts: 18
Joined: Mon Sep 05, 2016 9:04 pm
Car: 1994 Infiniti J30

Post

Turns out to be the fan clutch. Is it normal for it to roar on cold start or when accelerating?

fourdrinie
Posts: 537
Joined: Thu Mar 03, 2005 8:23 am
Car: 97 J30

Post

the FSM says for inspection: check fan coupling for rough operation, oil leakage or bent bimetal....
sounds like yours is toast...
replace


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