Compression problem? - Diesel Forum - TheDieselStop.com
Ford Diesel Forum / Powerstroke Forum
Ford Diesel Forum / Powerstroke Forum
Go Back   Diesel Forum - TheDieselStop.com > Ford Diesels > 7.3L IDI Diesels (Not Power Strokes)

7.3L IDI Diesels (Not Power Strokes) Technical discussion of topics related to vehicles powered by the 7.3 Liter In-Direct Injection Navistar engines.

TheDieselstop.com is the premier Diesel Truck Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools Display Modes
Old 08-08-2005, 05:57 PM   #1 (permalink)
Senior Member
 
Join Date: Jan 2003
Location: Pearson, Georgia
Posts: 177
My Photos: (0)
Feedback Score: 0 reviews
Compression problem?

Thanks all for help last couple of post.

Can any one give me the Steps and advice on removing the heads on 7.3 IDI to check them and find out why #8 has 0 Compression?

Thanks to all.
__________________
1989 F-250 4x4 C-6 7.3
1989 F-250 4x4 C-6 7.3
1991 F-250 4x4 E-4OD 7.3
1989 F-350 4x4 5 speed manuel 7.3 (present project truck)
1989 F-350 4x4 E-4OD 7.3 (4 door) (future project)
John deere 450C Crawler
Ford 6610 4x4 Tractor
Diamond Rio Dump Truck
Chevy Dump Truck
International Semi
remote is offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 08-08-2005, 07:45 PM   #2 (permalink)
Senior Member
 
hesutton's Avatar
 
Join Date: Oct 2002
Location: Greenville, KY
Posts: 1,872
My Photos: (30)
Feedback Score: 0 reviews
Re: Compression problem?

Mel (agnem) has a great Article on removing the heads for head gasket replacment. But, that will still apply to taking the heads off. Be sure to remove the head in reverse torque sequence, otherwise, you could warp or crack the heads! [img]/ubbthreads/images/graemlins/eek.gif[/img] [img]/ubbthreads/images/graemlins/vomit.gif[/img] If you don't have a manual (like Haynes) that gives you the sequence, some one on the site will have a link to it for you.

Did you find any problems when you removed the valve covers? Keep us up to date on what you find.

Heath
__________________
1986 F250HD 4x4 7.3L IDI '95 PSD front clip, '97 bed, T19, D60/10.25 with 3.55's. Rebuilt from the frame up. Banks Turbo, DPS IP & Stage 1's, Isspro TTM, Banks Exhaust, Boost gauge, Pyrometer, Precharged Coolant Filter, Holley Red Pump. 16.5 x 37 x 12.5 Goodyear Wrangler's, Air Horns. 6in lift, Fresh Paint, On-board Air. Revamped Interior. Rhino Liner.

1983 F250 4x4 5.0L with C6. 340,000+ miles.

7.3 Project Pictures
Webshots Project 7.3 Gallery

hesutton is offline   Reply With Quote Quick reply to this message
Old 08-08-2005, 09:20 PM   #3 (permalink)
Senior Member
 
Join Date: Nov 2002
Location: Minnesota
Posts: 2,457
My Photos: (0)
Feedback Score: 0 reviews
Re: Compression problem?

I would exhaust all other possibilities, before removing the heads.
It does not sound correct, 1 cylinder having 0 compression, and no other symptoms.
__________________
'93 F-250 IDI, 4x4, K&N, no soup bowl, stock, with 265,XXX miles 5 speed, 3.55, kind of new LUK clutch, runs great, starts great, it is great. The truck is getting old.
BuilderBob is offline   Reply With Quote Quick reply to this message
Old 08-08-2005, 09:33 PM   #4 (permalink)
Senior Member
 
cdnsarguy's Avatar
 
Join Date: Jan 2003
Location: Neepawa, Manitoba Canada
Posts: 20,672
My Photos: (109)
Feedback Score: 0 reviews
Re: Compression problem?

I'm with Bob on this one, dig around until all possible causes are exhausted before doing the head(s). Keep us up to date as to what you find it may tweek someone's memory reading your posted info...

Really not rocket science but there is a different tone of each valve when the stem is tapped with a hammer and it reseats, due to one being bigger than the other do two exhaust valves ie 6 and 8 then the two intake valves. The valves should sound the same ie both intakes, then both exhausts. If you get one set with a different sound of the same type valve that could isolate the problem a little.
__________________
93 F250 7.3 IDI S/C XLT 4X4 E40D 3.55LS, Captains chairs, Tutone Mocha, Leer 48" Hiboy cap, FR & RR hitches, full DeeZee running boards. Factory ordered/delivered Jan 93

Toys: 2006 37' Triple E Embassy coach (powered by Cummins), 18' Sylvan Pro Fish with Mariner motors.

Proud Canadian BOOB man too!!

Please PRIVATE MESSAGE only!! ...
Please DO NOT.....visitor message me...
cdnsarguy is offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

  Diesel Forum - TheDieselStop.com > Ford Diesels > 7.3L IDI Diesels (Not Power Strokes)

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Diesel Forum - TheDieselStop.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may post new threads
You may 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 Off
Trackbacks are On
Pingbacks are On
Refbacks are On



Wheel & Tire Center

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 05:08 PM.



Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.6.0

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.