What is the diffrence between a hydraulic & a mechanical pulley?

Asked by Jan 17, 2016 at 05:03 PM about the 2003 BMW 3 Series 325xi

Question type: Maintenance & Repair

I need to replace my upper idler pulley and lower tensioner I have a little squeaking going on after I start my car, and I was wondering how would I know if its a hydraulic or mechanical tensioner?

3 Answers

210,455

You'd know once you have the fan clutch and shroud off, the hydraulic tensioner uses a small damper/shock. But if you have a mechanical no worries, the Hydraulic is the replacement/upgrade. Make sure you get the mounting hardware with it if your upgrading. www.fcpeuro.com

Ok I had to twist it with a rachet wrench and socket is that a hydraulic or mechanical? I need to replace them there squeaking.

210,455

This is all you need to know...http://forum.e46fanatics.com/showthread.php? t=974746&highlight=pulley+guide

2 out of 2 people think this is helpful.

Your Answer

Add photo

Related Questions

3 Series

Looking for a Used 3 Series in your area?

CarGurus has 40,950 nationwide 3 Series listings starting at $1,250.

ZIP:

Search BMW 3 Series Questions

BMW 3 Series Experts

#1 Tom Demyan
Tom Demyan
Reputation 4,030
#2 Robert Charlson
Robert Charlson
Reputation 1,380
#3 Matt Mankinen
Matt Mankinen
Reputation 1,120
View All

Related Models For Sale

Used BMW 5 Series
628 Great Deals out of 17,695 listings starting at $1,500
Used BMW M3
83 Great Deals out of 2,162 listings starting at $3,495
Used Mercedes-Benz C-Class
972 Great Deals out of 32,767 listings starting at $1,950
Used Audi A4
345 Great Deals out of 13,174 listings starting at $1,599
Used Ford Mustang
682 Great Deals out of 38,461 listings starting at $1,963
Used Mercedes-Benz E-Class
732 Great Deals out of 22,813 listings starting at $1,600
Used BMW X5
576 Great Deals out of 16,847 listings starting at $2,788
Used BMW 7 Series
178 Great Deals out of 5,843 listings starting at $1,600
Used Honda Accord
1,189 Great Deals out of 77,750 listings starting at $969
Used BMW 6 Series
115 Great Deals out of 3,233 listings starting at $7,495
Used Chevrolet Camaro
659 Great Deals out of 39,411 listings starting at $2,995
Used BMW X3
308 Great Deals out of 13,224 listings starting at $2,295
Used BMW 1 Series
132 Great Deals out of 1,768 listings starting at $5,800

Used Cars For Sale

2017 BMW 3 Series For Sale
7,643 listings starting at $32,085
2016 BMW 3 Series For Sale
171 Great Deals out of 7,657 listings starting at $23,500
2015 BMW 3 Series For Sale
46 Great Deals out of 1,152 listings starting at $14,999
2014 BMW 3 Series For Sale
181 Great Deals out of 2,814 listings starting at $15,695
2013 BMW 3 Series For Sale
471 Great Deals out of 6,389 listings starting at $10,995