Few Issues. Grinding Noise.

[97/V-Spec]

Hi all.

I'm a owner of a r33 gtr. the car is in good condition. stock as a rock. only mods are defi gauges and hks bov.

There seems to be a strange grinding noise coming from below the car. only happens when the car is warm. never cold. roughly around 2.5 kpa on my defi's when i depress the clutch near the friction point. sometimes also happens on idle. when on idle i've noticed it usually happens when the oil pressure on my Defi's drops down a tad. in other words, when grinding noise starts, the oil pressure will drop down a tad. when the noise stops. the pressure will rise up again.

here is an audio clip

now on another issue which may be related. when i turn on the air con on hot days. the oil pressure sometimes drops a few kpa which results in a warning light on my Defi's

my mate's have suggested it may be a cracked or bad oil pump. i thought i'd get your opinion. cheers

Edited January 24, 2011 by 97/V-Spec

[maclarenf1]

I also have somewhat similar issue

when the car ideals sometimes, i can hear the grinding noise from gearbox / clutch from under the car. but if i press the clutch the noise goes away

have not noticed oil pressure drop, however.. but that could be due to me only owning the car for around 2 weeks

[Stewie Griffin]

Yea i'm having the same grinding noise problem atm. Pretty sure it's the tranfer case clutches or bearings are rooted. It wont effected oil pressure tho, that sounds abit moar serious

[MrStabby]

If it werent for the oil pressure issue, i'd say it sounds like a loose metal shield. What oil are you using? Tried something thicker (the second number represents the hot thickness and is the one to bump up, ie if you're running a ?W-40 try a ?W-50) to see if it makes any difference? You should get your used oil analysed - the report might point to the problem.