Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help



Go Back   PeachParts Mercedes-Benz Forum > Mercedes-Benz Tech Information and Support > Diesel Discussion

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 05-11-2011, 10:04 PM
vstech's Avatar
DD MOD, HVAC,MCP,Mac,GMAC
 
Join Date: Mar 2006
Location: Mount Holly, NC
Posts: 26,389
member in need, not diesel related...

Hello Jon How are you? Peter from connecticut..I wanted to get your opinion on a an engine problem I have an 02 chevy impala with 72000 miles and my mechanic is telling me that there in no compression in cylinder #6.. He wants to junk the engine and replace with used. I don't know what to do..What might be causing this to happen??? Mechanic does not want to open the engine and see what might be causing the problem??? Telling me its not worth it to fix...The main question is ...to fix or not to fix???

it's the 3.4l v6
I told him at a minimum i'd pull the even bank valve cover, and look and see if the rockers are moving.
could be simple dead lifter...

__________________
John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
Reply With Quote
  #2  
Old 05-11-2011, 10:10 PM
mach0415's Avatar
Diesel Weasel
 
Join Date: Mar 2010
Location: Lawndale, NC
Posts: 648
Cylinder leakdown test done?
__________________
Thanks,
Mark in NC

"Spark plugs?...We don't need no stinking spark plugs!"
1985 300SD "Der Silberne Schlitten" 420,000 mi


Wish these were diesel:
2003 Ford Club Wagon 130,000 mi
Reply With Quote
  #3  
Old 05-11-2011, 10:11 PM
Registered User
 
Join Date: May 2010
Posts: 137
did the leak down test already...
Reply With Quote
  #4  
Old 05-11-2011, 10:14 PM
Registered User
 
Join Date: Jan 2002
Posts: 18,355
Where's it leaking? Rings or valves or into the coolant passages?
__________________
1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13
Reply With Quote
  #5  
Old 05-11-2011, 10:14 PM
mach0415's Avatar
Diesel Weasel
 
Join Date: Mar 2010
Location: Lawndale, NC
Posts: 648
Leakdown test or compression test? If leakdown, where is compression escaping through? If heard through exhaust or intake, upper end. If coming out through the dipstick, lower end and perhaps a respectful burial.
__________________
Thanks,
Mark in NC

"Spark plugs?...We don't need no stinking spark plugs!"
1985 300SD "Der Silberne Schlitten" 420,000 mi


Wish these were diesel:
2003 Ford Club Wagon 130,000 mi
Reply With Quote
  #6  
Old 05-11-2011, 10:17 PM
Registered User
 
Join Date: May 2010
Posts: 137
Sorry.... i did not ask my mechanic where its leaking...if its lower end???
Reply With Quote
  #7  
Old 05-11-2011, 10:20 PM
Registered User
 
Join Date: May 2010
Posts: 137
So if the leak is from the lower end is it good night Irene for this engine????????
Reply With Quote
  #8  
Old 05-11-2011, 10:24 PM
Registered User
 
Join Date: Sep 2006
Location: Middle TN
Posts: 3,829
This may be a case of find another mechanic. He wants to do an engine R&R without proper diagnosis. Also, matter of worth is for customer to decide - not the mechanic. The mechanic's job is to diagnose, lay out alternatives with price, implement per the customer's decision and warranty his work. Those that can't diagnose frequently can't implement correctly and stated warranty becomes meaningless.

Yes, begin with leakdown. Gives more information than compression.
__________________
85SD 240K & stopped counting getting paint. 84SD 180,000. Probably up for sale in the fall 2020. 85TD beginning to repair to DD status.
Reply With Quote
  #9  
Old 05-11-2011, 10:26 PM
mach0415's Avatar
Diesel Weasel
 
Join Date: Mar 2010
Location: Lawndale, NC
Posts: 648
If it's lower end I'd be surprised if it has lived a life with adequate oil change and proper oil level maint. Lower end may signal the end of the engine. Did this come on all of a sudden? I have seen upper end issues arise as the result of a busted exhaust valve spring causing the piston to smack the valve and bend it...shaaazaam. Total compression loss. Pulled the head, did a valve job with new springs. Problem solved. It was on a comparably formidable blue oval mill-the famed 3.0 2v iron duke of the Ford flavor.
__________________
Thanks,
Mark in NC

"Spark plugs?...We don't need no stinking spark plugs!"
1985 300SD "Der Silberne Schlitten" 420,000 mi


Wish these were diesel:
2003 Ford Club Wagon 130,000 mi
Reply With Quote
  #10  
Old 05-11-2011, 10:29 PM
mach0415's Avatar
Diesel Weasel
 
Join Date: Mar 2010
Location: Lawndale, NC
Posts: 648
Quote:
Originally Posted by Junkman View Post
This may be a case of find another mechanic. He wants to do an engine R&R without proper diagnosis. Also, matter of worth is for customer to decide - not the mechanic. The mechanic's job is to diagnose, lay out alternatives with price, implement per the customer's decision and warranty his work. Those that can't diagnose frequently can't implement correctly and stated warranty becomes meaningless.

Yes, begin with leakdown. Gives more information than compression.
X2 the consideration rests on what it's worth to you.
__________________
Thanks,
Mark in NC

"Spark plugs?...We don't need no stinking spark plugs!"
1985 300SD "Der Silberne Schlitten" 420,000 mi


Wish these were diesel:
2003 Ford Club Wagon 130,000 mi
Reply With Quote
  #11  
Old 05-11-2011, 10:31 PM
Registered User
 
Join Date: May 2010
Posts: 137
Yes this came on all of sudden...was running fine and then this........and yes the car had regular oil changes and was kept up.....I am going to take it to another mechanic for second opinion
Reply With Quote
  #12  
Old 05-11-2011, 10:38 PM
mach0415's Avatar
Diesel Weasel
 
Join Date: Mar 2010
Location: Lawndale, NC
Posts: 648
Quote:
Originally Posted by Argospete View Post
So if the leak is from the lower end is it good night Irene for this engine????????
After first of all arriving at the fact that is lower end ( I am skeptical as it has low miles for that engine, assuming it has been taken care of), we have to consider what lower end issue could cause no compression. Hole burned or knocked in the piston, broken compression rings, busted rod. All of which would have let you know in advance, based on sound (except for busted rings maybe). If cylinder wall is damaged severely, then yes. It then becomes an excellent boat anchor. What led up to this? Any noise?
__________________
Thanks,
Mark in NC

"Spark plugs?...We don't need no stinking spark plugs!"
1985 300SD "Der Silberne Schlitten" 420,000 mi


Wish these were diesel:
2003 Ford Club Wagon 130,000 mi
Reply With Quote
  #13  
Old 05-11-2011, 10:45 PM
Registered User
 
Join Date: May 2010
Posts: 137
First, I dont know if its the lower end, just assuming it might be because mechanic did not tell me.. was at a gas station and filled the tank and pulled away and then it just started knocking....and losing power
Reply With Quote
  #14  
Old 05-11-2011, 10:48 PM
vstech's Avatar
DD MOD, HVAC,MCP,Mac,GMAC
 
Join Date: Mar 2006
Location: Mount Holly, NC
Posts: 26,389
... any chance you accidentally put diesel in accidentally?
__________________
John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
Reply With Quote
  #15  
Old 05-11-2011, 10:49 PM
vstech's Avatar
DD MOD, HVAC,MCP,Mac,GMAC
 
Join Date: Mar 2006
Location: Mount Holly, NC
Posts: 26,389
if not, water in the fuel could have blown the motor... but I doubt it.
before taking it to get a second opinion, ask the mechanic what the test revealed... ask him to justify needing a replacement motor.
then tell us, what he says.

__________________
John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

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




All times are GMT -4. The time now is 12:30 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page