Spun Bearing
12-29-2004, 11:13 PM
#1
Registered User
Thread Starter
Join Date: Oct 2004
Location: SHREVEPORT,LA
Posts: 9
Spun Bearing
Hello I Am In Need Of Some Help. Spun Bearing ! I Am Wondering If I Can Go Through The Oil Pan To Fix This Problem. If Anybody Knows Please Help Really Missing My Z (93 300zx Tt)
12-30-2004, 12:21 AM
#2
Administrative Brown Guy
Join Date: Jun 2003
Location: Ontario, Canada
Posts: 5,406
i'm not an expert on the inner workings of the z but hopefully this link might be of some use.
http://www.300zx.co.uk/cgi-bin/manual.cgi
http://www.300zx.co.uk/cgi-bin/manual.cgi
12-30-2004, 02:15 AM
#3
Registered User
Join Date: Dec 2004
Location: Surrey, South England
Posts: 14
Originally Posted by firefighter1179
Hello I Am In Need Of Some Help. Spun Bearing ! I Am Wondering If I Can Go Through The Oil Pan To Fix This Problem. If Anybody Knows Please Help Really Missing My Z (93 300zx Tt)
)You just need to suport the engine and drop the cross member then you can drop the sump. Should take you no longer then 2 hours :headspin:
12-30-2004, 07:57 AM
#4
Jack Of All Trades
Join Date: Jun 2004
Location: Acton, California
Posts: 2,296
The key here is, is what damage was done at the point where the bearing spun. If you spun a rod bearing, the chances are good that you damaged the rod. A new bearing will likely spin again. You should at least install and then check the clearance with plast-gage. If you spun a main you'll have to drop the crank a little. At that point you should replace all mains and again check with plasti-gage. Keep in mind too, that when you spin a bearing, it is usually caused by a partial siezure between the bearing and the mating (running) surface. A spun bearing is also a good sign that your motor is worn out. Trying to replace the bearing is only a temporary fix. If you go this route and it works, I would suggest running straight 40w or heavier oil with some stp or ....... 
Also keep in mind, if it was a rod bearing, and you see any discoloration, as in a bluish color on the rod itself, the rod is now soft and no good. Even with a new bearing, there's a very likely chance that the next problem will be with that rod sticking out through a hole in the side of your block. Just my 2 cents.
Also keep in mind, if it was a rod bearing, and you see any discoloration, as in a bluish color on the rod itself, the rod is now soft and no good. Even with a new bearing, there's a very likely chance that the next problem will be with that rod sticking out through a hole in the side of your block. Just my 2 cents.
Last edited by CanyonCarver; 12-30-2004 at 08:02 AM.
12-30-2004, 05:14 PM
#5
Registered User
Join Date: Dec 2004
Location: Surrey, South England
Posts: 14
Originally Posted by CanyonCarver
The key here is, is what damage was done at the point where the bearing spun. If you spun a rod bearing, the chances are good that you damaged the rod. A new bearing will likely spin again. You should at least install and then check the clearance with plast-gage. If you spun a main you'll have to drop the crank a little. At that point you should replace all mains and again check with plasti-gage. Keep in mind too, that when you spin a bearing, it is usually caused by a partial siezure between the bearing and the mating (running) surface. A spun bearing is also a good sign that your motor is worn out. Trying to replace the bearing is only a temporary fix. If you go this route and it works, I would suggest running straight 40w or heavier oil with some stp or .......
Also keep in mind, if it was a rod bearing, and you see any discoloration, as in a bluish color on the rod itself, the rod is now soft and no good. Even with a new bearing, there's a very likely chance that the next problem will be with that rod sticking out through a hole in the side of your block. Just my 2 cents.
Also keep in mind, if it was a rod bearing, and you see any discoloration, as in a bluish color on the rod itself, the rod is now soft and no good. Even with a new bearing, there's a very likely chance that the next problem will be with that rod sticking out through a hole in the side of your block. Just my 2 cents.
I agree here! I had a bearing go, so replaced it then a little while later got the dreded knock. Striped it down to find the rod almost about to split down the middle
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