Bearings replaced for serp. tensioner and idler pulleys. Part numbers.
10-23-08, 08:31 PM
#1
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Bearings replaced for serp. tensioner and idler pulleys. Part numbers.
Hello all,
Maybe this could be in the tech section or somewhere sticky, because I am listing the two bearings here that I just replaced on a 1996 LS400: Neither of the part numbers are listed here on clublexus accurately, as far as I could tell. Their part numbers are off the original bearing shields.
Both bolts are 14mm, but NOTE that the tensioner bolt is a left-handed thread and undoes to the right (clockwise).
These are for the serpentine (accessory) belt, NOT the timing belt:
=====================================================
Tensioner pulley bearing: 6203. There are different letters that follow, but basically you want a bearing sealed on both sides:
For Shaft Diameter 17 mm
Outside Diameter 40 mm
Width 12 mm
Torque on bolt: 12 ft lb (Note left hand thread - your torque wrench may not work in reverse).
McMaster-Carr part number: 5972K44
Cost: $5
See: http://www.mcmaster.com/
=====================================================
Top idler pully bearing: 6301. This is the very top pulley on the belt system, about 3 inches diameter:
For Shaft Diameter 12 mm
Outside Diameter 37 mm
Width 12 mm
Torque on bolt: 27 ft lb
McMaster-Carr part number: 5972K86
Cost: $7.80
See: http://www.mcmaster.com/
=====================================================
Both bearings can be pressed out using a shop press and an appropriate socket of just slightly smaller diameter. I could not see that hammering a socket would work, as it needed at least a ton of pressure to get out the tensioner bearing, and 2 tons for the idler bearing.
The tensioner bearing had disintegrated: on removal of the pulley, the ***** fell out and the cage was left half empty. But even like that, the bearing was only noisy when the engine was cold - when it was warmed up the bearing was quiet.
I could not remove the belt unless I removed the top idler pulley - just turning the tensioner pulley I could not remove it, as it was still too tight. Also, there is no belt diagram on my vehicle, so you might want to marker-pen the belt diagram onto the engine cover in case you get it mixed up.
Maybe this could be in the tech section or somewhere sticky, because I am listing the two bearings here that I just replaced on a 1996 LS400: Neither of the part numbers are listed here on clublexus accurately, as far as I could tell. Their part numbers are off the original bearing shields.
Both bolts are 14mm, but NOTE that the tensioner bolt is a left-handed thread and undoes to the right (clockwise).
These are for the serpentine (accessory) belt, NOT the timing belt:
=====================================================
Tensioner pulley bearing: 6203. There are different letters that follow, but basically you want a bearing sealed on both sides:
For Shaft Diameter 17 mm
Outside Diameter 40 mm
Width 12 mm
Torque on bolt: 12 ft lb (Note left hand thread - your torque wrench may not work in reverse).
McMaster-Carr part number: 5972K44
Cost: $5
See: http://www.mcmaster.com/
=====================================================
Top idler pully bearing: 6301. This is the very top pulley on the belt system, about 3 inches diameter:
For Shaft Diameter 12 mm
Outside Diameter 37 mm
Width 12 mm
Torque on bolt: 27 ft lb
McMaster-Carr part number: 5972K86
Cost: $7.80
See: http://www.mcmaster.com/
=====================================================
Both bearings can be pressed out using a shop press and an appropriate socket of just slightly smaller diameter. I could not see that hammering a socket would work, as it needed at least a ton of pressure to get out the tensioner bearing, and 2 tons for the idler bearing.
The tensioner bearing had disintegrated: on removal of the pulley, the ***** fell out and the cage was left half empty. But even like that, the bearing was only noisy when the engine was cold - when it was warmed up the bearing was quiet.
I could not remove the belt unless I removed the top idler pulley - just turning the tensioner pulley I could not remove it, as it was still too tight. Also, there is no belt diagram on my vehicle, so you might want to marker-pen the belt diagram onto the engine cover in case you get it mixed up.
Last edited by deanbrown; 10-23-08 at 08:41 PM.
This will save others some $$ from buying the whole thing. (Wish you had appended to the original thread...either way we'll find it...
)
10-24-08, 02:07 PM
#3
Intermediate
Thread Starter
That was a pure guess on the tons, because the gauge on my press is 0-50 so it was not registering much. I tried earlier to hammer the thing out but since I had the press I didn't bother trying too hard.
07-17-09, 07:32 AM
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What a post
good one here. Really helped me out! Ordered my bearings from McMaster-Carr online.. Called a few bearing shops around town, nobody said they had them.. Probably didn't want to sell just 2 bearings.. Love ordering online..LOL..
Thanks deanbrown3
good one here. Really helped me out! Ordered my bearings from McMaster-Carr online.. Called a few bearing shops around town, nobody said they had them.. Probably didn't want to sell just 2 bearings.. Love ordering online..LOL..
Thanks deanbrown3
10-06-09, 05:15 PM
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WOW, thanks so much for this info, the tensioner pulley, 6203 was easy, but the number on my idler bearing is BD20-15DUL and nobody has come up with a cross, but the 6301 is the exact same size. Doing a search for BD20-15DUL only gets one return of someone else looking for this bearing on another Lexus forum. This is valuable information as the best price I found for the idler pulley is $68 ouch!
10-06-09, 05:22 PM
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WOW, thanks so much for this info, the tensioner pulley, 6203 was easy, but the number on my idler bearing is BD20-15DUL and nobody has come up with a cross, but the 6301 is the exact same size. Doing a search for BD20-15DUL only gets one return of someone else looking for this bearing on another Lexus forum. This is valuable information as the best price I found for the idler pulley is $68 ouch!
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11-02-10, 06:08 PM
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Found bearings for change out at a great place in Gardena that sells 6203-2RS $6.95 and 6301-2RS $6.49 in stock had them within a day. Checked them out and they are good Japanese manufactured bearings not the cheap chinese stuff Mcmasters sells. Found online at Noma Bearing Corp
11-04-10, 08:58 AM
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Found bearings for change out at a great place in Gardena that sells 6203-2RS $6.95 and 6301-2RS $6.49 in stock had them within a day. Checked them out and they are good Japanese manufactured bearings not the cheap chinese stuff Mcmasters sells. Found online at Noma Bearing Corp
