Typical signs of engine wear.low compression - 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 05-27-2010, 09:26 AM   #1 (permalink)
Member
 
Join Date: Jan 2009
Posts: 31
My Photos: (0)
Feedback Score: 0 reviews
Typical signs of engine wear.low compression

My bus was rough starting, blowing smoke for a little while, someone said it was due to low compression. The smoke was white but smelles like diesel, not coolant. I got the glow plugs replaced, and the relay. Some of the wiring on the realy was so bad it basically was doing nothing. Starts like a dream, like my girlfriends corolla! Runs great, great power, never overheats, infact it runs a little cool which i need to get checked out, but better than runninghot! What are the typical signs of engine wear/low compression? Collant out the tailpipe on start, hard start, runs rough? anything else. I have none of those right now. Checked the oil, no foamy bubbles, checked the radiator, no oil bubbles at the top!
stratman42 is offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 05-27-2010, 09:48 AM   #2 (permalink)
Senior Member
 
CowKiller's Avatar
 
Join Date: Aug 2003
Location: Sellersville Pa
Posts: 1,160
My Photos: (12)
Feedback Score: 0 reviews
hard start. excessive engine blowby.

who old are your injectors/injection pump? how many miles on engine?
__________________
PLAY TRUCK
1986 F250 6.9,ATS turbo, np435, BW1356, hp 60,welded up sterling 10.25.
converted from 2wd to 4x4
sittin on 36x12.5 goodyears
GETTING CONVERTED TO SHORTBED AS WE SPEAK!

TOW RIG
2002 gmc 2500hd 6.6 duramax 5 speed allison
4x4 extened cab.

2000 F550 Lube Truck (Work Truck)

Certified PA Inspection Mechanic

i'd rather be 6.9'n than cummin or strokin'!
CowKiller is offline   Reply With Quote Quick reply to this message
Old 05-27-2010, 10:03 AM   #3 (permalink)
Member
 
Join Date: Jan 2010
Posts: 87
My Photos: (3)
Feedback Score: 0 reviews
Take off the oil filler cap, and see how much it smokes. My last 6.9 had a lot of blow by, and it would smoke like crazy.
7.3_idi is offline   Reply With Quote Quick reply to this message
Old 05-27-2010, 11:29 AM   #4 (permalink)
Senior Member
 
Join Date: Mar 2001
Location: Cody, Wy
Posts: 9,953
My Photos: (27)
Feedback Score: 0 reviews
Quote:
Take off the oil filler cap, and see how much it smokes. My last 6.9 had a lot of blow by, and it would smoke like crazy.
That's not going to tell you much unless you block off the CDR and then check blowby with a manometer to see if the reading is within specs.
__________________
Heavy truck and diesel mechanic (thankfully retired after 30+ yrs)
'91 F-250 SC 4X4, 5spd. ATS Turbo, 3:55 diff.
LMJD is offline   Reply With Quote Quick reply to this message
Old 05-27-2010, 10:57 PM   #5 (permalink)
Senior Member
 
Kevin 007's Avatar
 
Join Date: May 2009
Location: Nelson B.C
Posts: 526
My Photos: (0)
Feedback Score: 0 reviews
Ive seen both 7.3's and 6.9's with 8-900,000km on the clock, even with a lot of blowby they will still run well, maybe slower to start when cold due to lower compression, but nothing to be overly concerned about. You can always switch to a thicker oil to slow oil consumption.
Valve guide wear and cavitation is my biggest concern with the 7.3l
__________________
1984 F-250 6.9, T-19, BW1345, BB code injectors, low mileage, manual Beru Glow Plugs, D70 rear end. solid truck.

1985 Toyota Landcruiser BJ60, 5 bearing cam 3B 4cyl diesel, H55F trans. Best rig I have ever owned.

1981 Honda Trail 110.
Kevin 007 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:
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 03:29 AM.



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.