Very unhappy customer (NST pulleys). - Page 2 - Toyota Yaris Forums

tooter · 09-09-2013, 03:04 PM

Quote:

Originally Posted by cali yaris

^ You think that vibration, transferred by a rubber belt, broke a water pump pulley?

No. I only know that solid undamped crank pulleys vibrate. What happens after that is anyone's guess.

*Astroman* · 09-10-2013, 01:15 AM

I wanted to update that now my Yaris has a cracked NST water pump! I put mine on more than 90k miles ago and my car has been unused for the past 9 months. After a rough start and replacing a dead battery and what I thought was a bad thermostat I noticed that after a few hundred feet my water temps were so high I threw a CEL and my hot light came on. After hearing clacking I looked thinking of this thread and sure enough in one spot it's cracked! Not happy with NST and I KNOW FOR A FACT MINE WASN'T OVER-TORQUED because I've had it problem free for 90k miles!

B2FiNiTY · 09-10-2013, 01:31 AM

sounds like it simply wore out.

90k miles is pretty good usage for an aftermarket part if you ask me.

cali yaris · 09-10-2013, 01:33 AM

I think their "hard anodizing" may have weakened the metal or made it brittle. It's pretty thin where is bolts to the motor.

tooter · 09-10-2013, 01:46 AM

Quote:

Originally Posted by Astroman

I wanted to update that now my Yaris has a cracked NST water pump! I put mine on more than 90k miles ago and my car has been unused for the past 9 months. After a rough start and replacing a dead battery and what I thought was a bad thermostat I noticed that after a few hundred feet my water temps were so high I threw a CEL and my hot light came on. After hearing clacking I looked thinking of this thread and sure enough in one spot it's cracked! Not happy with NST and I KNOW FOR A FACT MINE WASN'T OVER-TORQUED because I've had it problem free for 90k miles!

Are you running the stock crank pulley?

Bluevitz-rs · 09-10-2013, 08:18 AM

Sounds like they designed it too thin or didn't machine it right.

*Astroman* · 09-10-2013, 01:47 PM

Quote:

Originally Posted by tooter

Are you running the stock crank pulley?

I'm running the full NST-lite pulley set problem free until yesterday. The wp pulley had a wear groove of about 1/16" and I wouldn't have known it was cracked if I hadn't been having overheating issues. My overheating turned out to be no coolant in the radiator.

Bluevitz-rs · 09-10-2013, 04:54 PM

Where'd the coolant go?

weedtank · 09-10-2013, 07:40 PM

We all know the moral of the story here..

Black_griffin6 · 09-11-2013, 02:50 PM

I'm very surprised at the responses this thread has gotten.
I think i'm more surprised I haven't heard of this happening before.
Definitely sounds like a design flaw in NST's pulley's, something is making them brittle and weak.
I was going to try and get another one from NST, but since everyone else seems to be having the same responses...it might be best to stick to OEM.

goliath1812 · 09-11-2013, 03:23 PM

makes me want to check my w/p pulley.....i hope it's ok! it's been on for quite some time.

Terrorize · 12-29-2013, 12:15 AM

I had a similar experience in that there was a lot of belt squealing and vibration....and then the belt eventually snapped. Turns out it was the NST WP pulley as well...after reading the problems you had I was going to switch back to OEM and this happened.

tooter · 12-29-2013, 03:41 PM

Quote:

Originally Posted by Terrorize

I had a similar experience in that there was a lot of belt squealing and vibration....and then the belt eventually snapped. Turns out it was the NST WP pulley as well...after reading the problems you had I was going to switch back to OEM and this happened.

Sorry to hear that, Terror... This is why I like the stock crank pulley because it damps crank vibrations.

Greg

Bluevitz-rs · 12-29-2013, 03:57 PM

I've been running my Perrin crank pulley for 8 years and have 140000 km on it with absolutely no issues. I've seen the stock pulleys fail too where the rubber rots and the outer part falls off, so six of one half dozen of the other.

tooter · 12-30-2013, 01:56 AM

Fair enough, Blue. There will always be different opinions drawn from each of our own personal experiences.

Greg

TOLMACH · 12-30-2013, 11:39 PM

^ (pics above)

Wow ((

JimKellyfan · 01-02-2014, 07:31 PM

I have heard too many downs and not enough ups for any pulley changing. Stock for me.

cali yaris · 01-02-2014, 10:16 PM

Quote:

I have heard too many downs and not enough ups for any pulley changing. Stock for me.

I don't think any downs from our Micro Image crank pulley. I'd like to keep our product separate in terms of reviews, unless someone has broken one of ours -- then I want to hear about it. Lumping all the crank pulley options together doesn't fit the evidence, in my opinion.

09-10-2013, 01:15 AM	#20
Astroman Modded Moderator View User's Garage Drives: 07 Toyota Yaris, 71 Galaxie Join Date: Mar 2007 Location: Wenatchee, WA Posts: 3,670	I wanted to update that now my Yaris has a cracked NST water pump! I put mine on more than 90k miles ago and my car has been unused for the past 9 months. After a rough start and replacing a dead battery and what I thought was a bad thermostat I noticed that after a few hundred feet my water temps were so high I threw a CEL and my hot light came on. After hearing clacking I looked thinking of this thread and sure enough in one spot it's cracked! Not happy with NST and I KNOW FOR A FACT MINE WASN'T OVER-TORQUED because I've had it problem free for 90k miles! __________________ Please visit my online store for computer stuff and Official Yarisworld decals!

09-10-2013, 01:33 AM	#22
cali yaris ULTIMATE View User's Garage Drives: 07 Yaris Turbo Join Date: May 2007 Location: Canoga Park, CA Posts: 14,859	I think their "hard anodizing" may have weakened the metal or made it brittle. It's pretty thin where is bolts to the motor. __________________ Micro Image forums, online store and shop are now closed. It was a great eight year run, but it was time to focus on other things. I'm still selling parts on eBay under micro*image seller ID and customers can still make requests for anything specific.

09-10-2013, 07:40 PM	#27
weedtank I need more stars Drives: Liftback Join Date: Jun 2009 Location: CA Posts: 123	We all know the moral of the story here.. __________________

09-11-2013, 03:23 PM	#29
goliath1812 View User's Garage Drives: 2010 Prius, 2007 Yaris Sedan Join Date: Oct 2009 Location: Ocala Florida Posts: 368	makes me want to check my w/p pulley.....i hope it's ok! it's been on for quite some time. __________________

01-02-2014, 07:31 PM	#35
JimKellyfan Drives: 2010 Yaris Sedan Join Date: Oct 2013 Location: the good Carolina Posts: 173	I have heard too many downs and not enough ups for any pulley changing. Stock for me. __________________ 2010 Yaris sedan, TRD CAT back (sport muffler only, really), OBX header (relocated front AF sensor to front pipe), OBX throttle plate spacer, K&N filter (in stock air box-for now), TRD struts and shocks, Mexico Rough Road Springs x 4, new Yota sway bar links front, slotted/drilled rotors and Maxx brakes front, Valvoline synthetic brake fluid, 3M undercoated, 16" Konig Feathers Michelin Pilot Sport AS 3 + Tires TRD rear sway bar, 4 GT Spec bars including: front strut brace 2 point, 4 point ladder brace, mid chassis brace and rear lower tie brace, rear hitch, [B]

09-10-2013, 01:31 AM	#21
B2FiNiTY Drives: Prius C Join Date: Feb 2013 Location: US Posts: 240	sounds like it simply wore out. 90k miles is pretty good usage for an aftermarket part if you ask me.

09-10-2013, 08:18 AM	#24
Bluevitz-rs 1NZ-6spd View User's Garage Drives: '05 6-Spd Vitz RS Join Date: Oct 2008 Location: Oshawa, Ontario, Canada Posts: 2,967	Sounds like they designed it too thin or didn't machine it right.

09-10-2013, 04:54 PM	#26
Bluevitz-rs 1NZ-6spd View User's Garage Drives: '05 6-Spd Vitz RS Join Date: Oct 2008 Location: Oshawa, Ontario, Canada Posts: 2,967	Where'd the coolant go?

09-11-2013, 02:50 PM	#28
Black_griffin6 View User's Garage Drives: 09 Meteoric Metallic 3 door HB Join Date: Jul 2010 Location: Atlanta Georgia Posts: 419	I'm very surprised at the responses this thread has gotten. I think i'm more surprised I haven't heard of this happening before. Definitely sounds like a design flaw in NST's pulley's, something is making them brittle and weak. I was going to try and get another one from NST, but since everyone else seems to be having the same responses...it might be best to stick to OEM.

12-29-2013, 12:15 AM	#30
Terrorize Toyota Newb!! View User's Garage Drives: Yaris S Sedan w/ Aero Package! Join Date: Jun 2006 Location: Toronto Posts: 228	I had a similar experience in that there was a lot of belt squealing and vibration....and then the belt eventually snapped. Turns out it was the NST WP pulley as well...after reading the problems you had I was going to switch back to OEM and this happened.

12-29-2013, 03:57 PM	#32
Bluevitz-rs 1NZ-6spd View User's Garage Drives: '05 6-Spd Vitz RS Join Date: Oct 2008 Location: Oshawa, Ontario, Canada Posts: 2,967	I've been running my Perrin crank pulley for 8 years and have 140000 km on it with absolutely no issues. I've seen the stock pulleys fail too where the rubber rots and the outer part falls off, so six of one half dozen of the other.

12-30-2013, 01:56 AM	#33
tooter play every day Drives: 2012 Yaris L 2dr 5sp Join Date: Apr 2012 Location: Los Angeles Posts: 1,961	Fair enough, Blue. There will always be different opinions drawn from each of our own personal experiences. Greg

12-30-2013, 11:39 PM	#34
TOLMACH Drives: soarer Join Date: Feb 2011 Location: Beautiful British Columbia Posts: 954	^ (pics above) Wow ((

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