URGENT!! Timing belt, Radiator fan and Alternator dont spin

Nissan 300ZX technical discussion forum: Maintenance, performance, installations, modifications, how-to's and troubleshooting.
Zooey32
Posts: 13
Joined: Tue Aug 14, 2012 6:51 pm
Car: 1991 Nissan 300zx N/A z32 2+2 T top. First and only car<3
Location: Pomona, CA

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My radiator fan, belt and alternator wont spin or move. The car starts but starts making a loud noise. Also my battery light, anti-lock light are on for some odd reason and my steering stiffened.

Any help will be appreciated


GerryO
Posts: 974
Joined: Fri Feb 09, 2007 11:47 am
Car: 1993 J30t
Pearl White
Black Interior

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Sounds like the crankshaft pulley Woodruff Key (00926-51600) is sheared off. I've also heard of pulleys separating. Continuing to operate the engine could ruin the pulley or the crankshaft, and the engine may over-heat. The other key engages the crankshaft sprocket, that turns the timing belt and the camshafts.

The battery is going dead and the PS isn't working, as the pulley that drives it, along with the alternator, fan and the AC, isn't being turned by the crankshaft.

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t.mcginley.jr
Posts: 1547
Joined: Fri Jun 01, 2012 5:50 am
Car: 2002 Nissan Altima SE 3.5
1990 Nissan 300ZX NA 2+0
1966 Ford Mustang
Location: New Jersey, USA

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Have you actually popped the hood yet and looked around inside the engine bay?

aroche25
Posts: 195
Joined: Fri Jan 14, 2011 12:46 pm
Car: 2007 Mazdaspeed 3 GT
Looking for a Z32 Slicktop
Location: Florida

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Something similar started happening to me shortly after i got the car, just not nearly as bad. It would happen when I loaded up the car, A/C, Headlights, Foglights and Stereo. I d get all the same lights you have. Turns out my crank pulley had completely separated in the middle and whenever stress was put on it, my alternator would stop spinning and my voltage would drop off. I drove a year and half like this because I was new to the Z. Needless to say during that year or so i replaced the alternator, battery, belt and connections to no avail. It was only after doing a 60k timing kit I noticed it. I couldn't get the timing light to find the marking to set timing. So i took it to a friend who is a Z and Skyline mechanic and he said hes never seen this before, then said ohh the pulley must be separated. Then he cautioned me to take it easy because it could fly off and kill the engine (I was driving it for over a year hard :ohno: ). Needless to so I replaced it with a solid UR under-drive one. Never will have that issue again.

Zooey32
Posts: 13
Joined: Tue Aug 14, 2012 6:51 pm
Car: 1991 Nissan 300zx N/A z32 2+2 T top. First and only car<3
Location: Pomona, CA

Post

Alright thanks for all the help And GerryO u were dead on i think. Well im going to keep you guys updated i took my car to a mechanic and he pulled out the crank pulley that seemed like it cracked or something ill post a pic of it later. Hes going to install a new pulley. he informed me that hopefully my crankshaft didnt get damaged if it did well...........im done for. So im hoping for the best.


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