Go Back   Ford Truck Enthusiasts Forums > Diesel > Pre-Power Stroke Diesel (7.3L IDI & 6.9L)
Sign in using an external account
Register Forgot Password?


Pre-Power Stroke Diesel (7.3L IDI & 6.9L) Diesel Topics Only

Welcome to Ford-Trucks Forums!
Welcome to Ford-Trucks.com.

You are currently viewing our forums as a guest, which gives you limited access to view most discussions and access our other features. By joining our 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 the Ford-Trucks Forums community today!





 
Reply
 
LinkBack Thread Tools Search this Thread
  #1  
Old 07-18-2010, 02:15 AM
swooshcmk swooshcmk is offline
Elder User
 
Join Date: Apr 2002
Location: West Bend
Posts: 949
swooshcmk is starting off with a positive reputation.
CDR Test

Ok I've searched and done the CDR test, which it would seem mine should be good (cover the exit and blow on the intake and the diaphragm moves, or blow on the vent hold and the diaphragm moves). But really, when it's sitting there I can suck and blow on either side and it's just like blowing through a tube - is that right? I'd think there should be some sort of restriction right? Else there's no difference from a straight hose..

Do I have a good diaphragm with a bad valve seat or something?
Reply With Quote
  #2  
Old 07-18-2010, 09:17 AM
PLC7.3 PLC7.3 is offline
Post Fiend
 
Join Date: Nov 2004
Location: Manitoba
Posts: 5,638
PLC7.3 is gaining momentum as a positive member of FTE.
The CDR restricts the blowby by closing in and making the passage slightly smaller. Ensure the small hole on the rear is open so it will allow air in and allow the diaphram to work.

Do you know when to service your CDR valve?

All 6.9L and 7.3L diesel engines are equipped with a CDR (Crankcase Depression Regulator) valve. Even the new 7.3L Power Stroke is also equipped with the same valve. The CDR valve is one of the leading causes of head gasket failure in these engines. The CDR valve is responsible for controlling the pressure/vacuum in the engine crankcase, and seperating the oil mist from the air and returning the oil to the crankcase. The CDR valve should be serviced every second oil change or when signs listed below are seen.

When the CDR valve is not properly serviced, engine oil enters the air intake and is drawn into the engine. The diesel engine will burn this oil as fuel, however, it is heavier and thicker than diesel fuel and, having greater BTU output, causes excessive heat in the cylinder. Due to the intake manifold design, most of the oil will migrate to #7 and #8 cylinders; the last two cylinders in the rear by the firewall. The increased temperature here will cause the cylinder head to lift off the gasket and allow water or oil to leak out the back of the cylinder head where it meets the block.

To check your CDR valve, remove the air cleaner hold down bolt and inspect it. If the bolt is covered with engine oil mist, it's time to service your CDR valve! Ford calls this item a "Adapter assembly for Crankcase Ventilation" Part number E3TZ-6A665-A or IH part #1805319C1


To service the CDR wash with a solvent, allow to dry, do not use compressed air to dry. There is a small hole in the CDR back cover, ensure it is clean and open. If black chunks of rubber are visible in the intake, on the screen then the rubber membrane has disintegrated, replace the CDR.

CDR valve parts


Ford calls this item a "Adapter assembly for Crankcase Ventilation" Part number E3TZ-6A665-A

IH part #1805319C1
__________________
93 F250 SC 4x4 E4OD 355LS
Reply With Quote
  #3  
Old 07-18-2010, 02:13 PM
swooshcmk swooshcmk is offline
Elder User
 
Join Date: Apr 2002
Location: West Bend
Posts: 949
swooshcmk is starting off with a positive reputation.
yeah I tested it and cleaned it but it still seems to be letting oil past so that's why I asked.
Reply With Quote
Old 07-18-2010, 02:13 PM
Reply

Go Back   Ford Truck Enthusiasts Forums > Diesel > Pre-Power Stroke Diesel (7.3L IDI & 6.9L)

Tags
1805319c1, 6a665, 73, 73l, adapter, assembly, cdr, crankcase, depression, e3tz6a665a, ford, ih, part, regulator, test, valve, ventilation

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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
Trackbacks are On
Pingbacks are On
Refbacks are On
Forum Jump



All times are GMT -5. The time now is 03:55 AM.


Powered by vBulletin® Version 3.7.5
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Advertising - Terms of Use - Privacy Statement - Jobs
This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. FordŽ is a registered trademark of the Ford Motor Company.

vbulletin Admin Backup