b18T01

Hi guys ı have serious problem ,
breaking the oil pump 2 times from same place ,where do you think the real problem, thanks to for your answers.

setup:
b18a2 w/vtec(b16 head), itr cams, 9+cr
gt30 turbo 8000rpm 1 bar

itr oil pump 2 times broken

added photo for broken parts

cpl rampage

ouch, what crank pulley are you using?

b18T01

lightweight crank pulley

(only crank pulley)

mar778c

iTrader: (1)

That pulley is the problem.

Muckman

iTrader: (2)

People still use those?!

NY GsR

get rid of that pulley ASAP. that is the problem

Hulkdon1

The Unorthodox pulley is a good concept on paper, not with boost. That is your problem. The rotation of the bottom end is out of harmony. For a NA motor, that pulley may work well, but with all the pressure of boost, all of the motor's tolerances will be checked. Be sure to change the oil filter, oil and clean the oil pan. Some of the little particles from the gear may be still there.

Stock pulley or liquid filled aftermarket. GL.

b18T01

thanks for answer I will check that , but this pulley working fine almost 3 years.
where else is problem

th3pwn3r

Your mains are off then. Keep breaking pumps until you figure it out I guess. Good luck.

scarvalho

i have the same problem on my bosst b16

aftermarket crank polleys NEVER

civickiller

+1 if u change pulley and same thing happens

DDTECH

ignorance.. Marc already told you what the problem is.. run a standard GSR or LS crank pulley and you'll never break another pump again..

met

I like the ati damper because you can rebuild it down the road. The fluid damper and ati both claim there are better and the other sucks but I have seen and read about many setups with both doing very well. This link i am posting is a good writeup of why you need a good damper.
http://www.atiracing.com/products/da...mper_dinan.htm
Even if there is a problem with your mains the damper will just compound the issue.
Just my 2 cents, the link is worth the read if nothing else.

W!d3b0dYr3X

Get a new pump install it and use feeler gauges to go around the crank where it goes through and check the clearance. There should be little drag and equal amounts all the way around if not you will have to grind the dowels a little to move the pump in the direction it needs to go.

boostedteg909

another thing u can check while that pump is off jus to b sure is the clearance on the rotors while installed. if the main bearing caps were align-bored at any point in time, that may b puttin excess pressure on the rotor inside the pump. do as W!d3b0dYr3X said

b18cya94

iTrader: (1)

have u had the rotating assembly balanced? if not that combined with those pulleys thats where your problem is. get balanced and a fluiddampr, or ati..

Gunmetal_B20_Hatch

iTrader: (9)

If your mains have been line-bored a considerable amount, this can happen also...

vwbased

have a nice day

viper_boy403

iTrader: (1)

obviously not

jdm inc

iTrader: (11)

get rid of it and buy an ati damper

Turbo B18C EJ6

buy stock pulley=problem solved., unless you have had a align bore done on your mains or main studs installed.

b18T01

thanks for answers ,we will use a ati street damper high probability

Turbo-LS

iTrader: (4)

ATI street damper FTW or OEM is cheap if not free. bt the ati will absorb alot more harmonics than oem. First post sa the broken pump and immediatly thought N1 type r pulley LOL but yeah those lightweight aftermarkets are crap

NA James

Ati street. I broke a oil pump because of a old fluidamper.

Charlie Moua

iTrader: (3)

yeah my buddies turbo b16 just cranked his oil pump too... he was running the ctr pulley...