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LS - 1st and 2nd Gen (1990-2000) Discussion topics related to the 1990 - 2000 Lexus LS400

Oem pulleys etc

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Old Sep 25, 2023 | 04:39 PM
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Default Oem pulleys etc

Hey guys. Here's a little ramble post. Please respond with what you have done in the same situation as yourself or add to the convo some other way.

My serpentine belt tensioner pulley was completely shot. I went to napa and grabbed a pulley from them for around 30 bucks.. it's labeled "gates" but made by dorman according to the napa website, and is stamped china. It had slight play upon installation, but works perfectly fine. I would like to buy an oem lexus one or equivalent to oem. Anyone have a part number for me? Thanks. I know people press in new bearings but I don't have the ability or energy to source the correct one... for future reference the oem bearing is/was NYN 6203LH... So if someone could guide me to a proper solution please do

My second part of my post Is an interesting discovery. It appears napa carries a brand called "altrom" also labeled "ATM".. I've heard and read they are oem suppliers for Japanese brands including toyota. I bought sway bar links for my 01 tundra from napa that was made by altrom/distributed by altrom, and they were insanely good quality. I will also mention I found an idler pulley for my 94 ls400, labeled as an altrom part from napa... guess who is the actual maker of the part? NSK, who is a well known pulley/bearing supplier for our lexus's. This means altrom Is simply a distributor of oem parts. I will link or screenshot a photo of this idler pulley for you. It cost around 70 bucks.
what I'd like is for some of you with your sacred knowledge of oem parts for the ls400's is to post your knowledge on oem pulley parts for our cars as in who makes them. Also tell me if I should just bite the bullet and buy the oem parts from lexus vs the aftermarket route. Sorry my heads spinning, I'm a new lexus owner and only want the best parts on my new purchase, and I am just fill of questions and newly learned knowledge
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Old Sep 25, 2023 | 04:54 PM
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Here is absolute confirmation that altrom (ATM) Is a distributor of oem parts.

Nsk branded idler pulley. See part number

Napas altrom pulley, see manufacturer description

Napa altrom pulley, see and compare part numbers....
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Old Sep 26, 2023 | 10:08 AM
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Originally Posted by pucks18
Hey guys. Here's a little ramble post. Please respond with what you have done in the same situation as yourself or add to the convo some other way.

My serpentine belt tensioner pulley was completely shot. I went to napa and grabbed a pulley from them for around 30 bucks.. it's labeled "gates" but made by dorman according to the napa website, and is stamped china. It had slight play upon installation, but works perfectly fine. I would like to buy an oem lexus one or equivalent to oem. Anyone have a part number for me? Thanks. I know people press in new bearings but I don't have the ability or energy to source the correct one... for future reference the oem bearing is/was NYN 6203LH... So if someone could guide me to a proper solution please do

My second part of my post Is an interesting discovery. It appears napa carries a brand called "altrom" also labeled "ATM".. I've heard and read they are oem suppliers for Japanese brands including toyota. I bought sway bar links for my 01 tundra from napa that was made by altrom/distributed by altrom, and they were insanely good quality. I will also mention I found an idler pulley for my 94 ls400, labeled as an altrom part from napa... guess who is the actual maker of the part? NSK, who is a well known pulley/bearing supplier for our lexus's. This means altrom Is simply a distributor of oem parts. I will link or screenshot a photo of this idler pulley for you. It cost around 70 bucks.
what I'd like is for some of you with your sacred knowledge of oem parts for the ls400's is to post your knowledge on oem pulley parts for our cars as in who makes them. Also tell me if I should just bite the bullet and buy the oem parts from lexus vs the aftermarket route. Sorry my heads spinning, I'm a new lexus owner and only want the best parts on my new purchase, and I am just fill of questions and newly learned knowledge
you really just need the bearings, I got mine off eBay, they were branded as NSK for about $20 a few years ago, for idler and tensioner. Press in/out and you're set. Dig on this forum a bit, I was able to find the dimensions needed, some other member did it, can't remember where the post is though.
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Old Sep 26, 2023 | 04:03 PM
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Originally Posted by Losiracer2
you really just need the bearings, I got mine off eBay, they were branded as NSK for about $20 a few years ago, for idler and tensioner. Press in/out and you're set. Dig on this forum a bit, I was able to find the dimensions needed, some other member did it, can't remember where the post is though.
the bearings are 6203lh (ntn brand, which is oem..) for the tensioner pulley. I don't have bearing press and it looks hard to press them in without one without messing up the bearing. I just went ahead and bought the nsk pulley with the nsk bearing in it for 30 bucks. Though I'm still considering pressing a new one into my serp belt tensioner pulley, I don't know exactly what bearing I need, mostly the letters are the end of 6203. I can't find a 6203 lh bearing
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Old Sep 27, 2023 | 09:36 AM
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Originally Posted by pucks18
the bearings are 6203lh (ntn brand, which is oem..) for the tensioner pulley. I don't have bearing press and it looks hard to press them in without one without messing up the bearing. I just went ahead and bought the nsk pulley with the nsk bearing in it for 30 bucks. Though I'm still considering pressing a new one into my serp belt tensioner pulley, I don't know exactly what bearing I need, mostly the letters are the end of 6203. I can't find a 6203 lh bearing
This was the thread I referenced for my at the time 97' LS. Post 83 was what I used and 85 is a DIY sort of. But double check to see if it also works for 98-00.

https://www.clublexus.com/forums/ls-...numbers-6.html
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Old Sep 27, 2023 | 11:06 PM
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When searching for bearings for the accesory belt pulleys for my '98 ls i couldn't find the bearings for the idler pulley, but found while searching for the bearing number online that the pulley with the new bearing already pressed in was available for relatively small dollars via (of all places) amazon. They're in stock for $33.99.

NSK 70SPPV0408DDUL

And yes it comes in an NSK box.
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