E46 BMW Social Directory E46 FAQ 3-Series Discussion Forums BMW Photo Gallery BMW 3-Series Technical Information E46 Fanatics - The Ultimate BMW Resource BMW Vendors General E46 Forum The Tire Rack's Tire Wheel Forum Forced Induction Forum The Off-Topic The E46 BMW Showroom For Sale, For Trade or Wanting to Buy

Welcome to the E46Fanatics forums. E46Fanatics is the premiere website for BMW 3 series owners around the world with interactive forums, a geographical enthusiast directory, photo galleries, and technical information for BMW enthusiasts.

You are currently viewing our boards as a guest which gives you limited access to view most discussions and access our other features. By joining our free community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join our community today!

If you have any problems with the registration process or your account login, please contact contact us.

Go Back   E46Fanatics > Tuning & Tech > DIY: Do It Yourself

DIY: Do It Yourself
Post here to share or improve your wrench turning skills! All BMW E46 DIY tips, tales, and projects discussed inside. Learn to work on your car and know the right BMW parts you will need!

Reply
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 03-08-2017, 12:26 PM   #1
mrpinstripsuits
Registered User
 
Join Date: May 2005
Location: UCLA/Bay Area
Posts: 51
My Ride: carbon black e46 m3
DIY: E46 M3 Remove accidental snapped Constant Pressure Valve (CPV) from engine block

Greetings-

This DIY is to show you how to remove an accidentally snapped, exploded, or stuck Constant Pressure Valve (CPV) from the engine block after accidentally over tightening, so you do not have a panic attack like what I experienced.

The issue:
If you are reading this, then you probably did something similar to what I did. You accidentally used a torque wrench to tighten the CPV and had the torque set to 35 lbs (because you read too fast after googling E46 M3 CPV torque specs) and heard a pop sound. Afterwards, the CPV kept spinning clockwise as you tightened, but it was not tightening.



MORAL OF THE STORY: DO NOT USE A TORQUE WRENCH TO TIGHTEN THE CPV OR YOU WILL SNAP THE BOLT.



How a snapped constant pressure valve looks like after you remove the top portion:







Tools required to extract the remains of the Constant pressure valve from Harbor Freight tools:





How it will work:


This tool will work because the drag link socket is wide enough to still catch on the the remaining teeth of the Snapped Constant Pressure valve.









Stick the above tool in the hole with firm pressure and turn counter clockwise:





The tool will catch on to the remaining teeth of the snapped Constant pressure valve bolt out and unscrew it out.




The Tool depicted above was inspired by a post on the M3forum from a brilliant member who invented this type of tool with a thumbwheel ratchet to solve the above issue: "petik."

See:

http://www.m3forum.net/m3forum/showt...=409432&page=6


I hope this DIY helps prevent someone from panicking like I did.

All the best.

-M
__________________

Last edited by mrpinstripsuits; 03-08-2017 at 01:43 PM.
mrpinstripsuits is offline   Reply With Quote
Ads by Google

Guests, get your FREE E46Fanatics.com membership to remove this ad.
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Censor is ON





All times are GMT -5. The time now is 03:42 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
(c) 1999 - 2016 performanceIX Inc - privacy policy - terms of use