underdrive pulley help!

jdmjerry07 · Post by **jdmjerry07** » Sat Nov 10, 2007 11:06 pm

i need help trying find out what size belt i need for my 99 coupe d16y8 with my new underdrive pulley... i have no powersteering or ac only thing it runs is the alternator so what size belt would i need? any help..

mike93hatch · Post by **mike93hatch** » Sat Nov 10, 2007 11:15 pm

if its some ebay "underdrive pulley" then just throw it in the trash and stick the oem damper back on before you trash your oil pump and then your motor.

Gunmetal Si · Post by **Gunmetal Si** » Sun Nov 11, 2007 12:59 am

mike93hatch;78096 wrote:if its some ebay "underdrive pulley" then just throw it in the trash and stick the oem damper back on before you trash your oil pump and then your motor.

word!!!!!!!!!!!!:goodpost: :iamwithstupid:

JustRob · Post by **JustRob** » Sun Nov 11, 2007 1:28 am

mike93hatch;78096 wrote:if its some ebay "underdrive pulley" then just throw it in the trash and stick the oem damper back on before you trash your oil pump and then your motor.

+1762763228176936556

Sleepy Civic DX · Post by **Sleepy Civic DX** » Mon Nov 12, 2007 8:58 pm

Dont bash me for asking, but is he talking about a crank pulley or an alt pulley? (I agree with you guys if it is an aftermarket crank pulley)

My AEM pulley set says underdrive on it and it doesnt replace the crank pulley.

If it is an alt pulley, if you still have the belts off of the car, I can help you decipher the part number on the belts, (the belts overall length is built into the parts number)

I also have about 7 honda drive belts in my garage so I can measure them for comparison, if you cant read the part numbers on the belts, if that would help

Waffles · Post by **Waffles** » Mon Nov 12, 2007 9:01 pm

Sleepy Civic DX;78298 wrote:Dont bash me for asking, but is he talking about a crank pulley or an alt pulley? (I agree with you guys if it is an aftermarket crank pulley)

My AEM pulley set says underdrive on it and it doesnt replace the crank pulley.

If it is an alt pulley, if you still have the belts off of the car, I can help you decipher the part number on the belts, (the belts overall length is built into the parts number)

I also have about 7 honda drive belts in my garage so I can measure them for comparison, if you cant read the part numbers on the belts, if that would help

instead of your oil pump you are messing with your alt bearings. They are all poorly balanced.

EDIT: If you really neeed a belt, take your old one to the parts store, they have a tool for measuring.

Sleepy Civic DX · Post by **Sleepy Civic DX** » Mon Nov 12, 2007 9:06 pm

btlfedgolf;78299 wrote:instead of your oil pump you are messing with your alt bearings. They are all poorly balanced.

EDIT: If you really neeed a belt, take your old one to the parts store, they have a tool for measuring.

Not a quality pulley, I have ran both aem and unorthadox racing between my motors and never had a problem, if the pulley isnt torqued down correctly and it wobbles it could wear bearings, but I dont see a reason otherwise. I have also worked on a car where the belt was on the wrong spot on the crank (a/c was removed) and it messed the alt. up.

not trying to start a pissing match with you, but I think pulleys (not the crank pulley of course) is a viable and safe bolt on

Gunmetal Si · Post by **Gunmetal Si** » Mon Nov 12, 2007 10:55 pm

its not a damper thats whats wrong with it. same as the ctr. if u do not balance all of the things in the rotating, u will have problems!

Waffles · Post by **Waffles** » Mon Nov 12, 2007 11:40 pm

Sleepy Civic DX;78300 wrote:Not a quality pulley, I have ran both aem and unorthadox racing between my motors and never had a problem, if the pulley isnt torqued down correctly and it wobbles it could wear bearings, but I dont see a reason otherwise. I have also worked on a car where the belt was on the wrong spot on the crank (a/c was removed) and it messed the alt. up.

not trying to start a pissing match with you, but I think pulleys (not the crank pulley of course) is a viable and safe bolt on

Just because something is not good does not mean you will put it on your car and suddenly everything will break. Parts like alternator and crank pulleys will shorten the life of parts causing premature wear. Its not going to toast your bearings from the start, but they will go out alot sooner than usual. Same with the crank. It can cause minor crank deflection causing your main bearings to wear quicker. You can take the parts to get balanced so that they wont cause as much wear, but the gains are nowhere dear the price+price of balancing that it will cost.

jdmjerry07 · Post by **jdmjerry07** » Mon Dec 03, 2007 10:08 pm

the underdrive pulley is an aem underdrive pulley and i think i will take it to a parts store and figure out what new size i need