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 > Tech Help

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 05-29-2006, 09:31 PM
ltack1950
 
Join Date: Apr 2006
Location: Elkhorn City, Kentucky
Posts: 40
where do i go from here 2.3 lost compression

have 87 190e 2.3, ran good on way home started missing, when i stop the engine shook the whole car, pulled off one plug wire no change in engine running, plug firing, repeated this to 2nd cyl. same, the engine would run and idle about the same with 2 plug wires off, checked compression on 1st cyl no reading where should i go from here????????????

Reply With Quote
  #2  
Old 05-29-2006, 10:00 PM
190E///AMG's Avatar
Registered User
 
Join Date: May 2006
Posts: 10
No reading of compression whatsoever?? I would check again and all 4 cylinders. Losing compression is gradual and not only on one trip to home...

Just my opinion
__________________
1987 190E 2.3 8 Valve
1993 VW Passat Turbo-D
Reply With Quote
  #3  
Old 05-29-2006, 10:26 PM
t walgamuth's Avatar
dieselarchitect
 
Join Date: Apr 2005
Location: Lafayette Indiana
Posts: 35,538
well.....unless you dropped a valve.

tom w
__________________
[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.
Reply With Quote
  #4  
Old 05-29-2006, 11:37 PM
ltack1950
 
Join Date: Apr 2006
Location: Elkhorn City, Kentucky
Posts: 40
the type of compression tester was a cheap one the kind you hold to plug hole not a screw in type, i checked the 3rd cyl. it started to rise when first turning over engine, it turned 4 several seconds but never got 2 the min. compression lbs.
if i had dropped a valve wouldnt it be knocking, i also removed the valve cover just 4 a visual inspection couldnt see anything out of ordinary, also put in new rotary button and cleaned dist. cap
Reply With Quote
  #5  
Old 05-30-2006, 01:28 AM
GVB GVB is offline
Registered User
 
Join Date: May 2006
Posts: 178
.I don't understand how people can make something as easy as checking compression in an engine so difficult. Pull the green or black wire going to the ignition module on the drivers side fender off. Turn the car over, does it sound even? If it does, then you have the compression in all cylinders. If you sucked a valve, you would not have made it home. I'll bet you it is just a tune problem, or you have a bad injector.
Reply With Quote
  #6  
Old 05-30-2006, 10:44 AM
t walgamuth's Avatar
dieselarchitect
 
Join Date: Apr 2005
Location: Lafayette Indiana
Posts: 35,538
maybe not. i would not think it was definate as to whether you got home with a broken valve. i suspect there are many ways a valve can break.

tom w
__________________
[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.
Reply With Quote
  #7  
Old 05-30-2006, 11:11 AM
Senior Member
 
Join Date: Jun 2001
Location: Northern Calif. (Fairfield Area)
Posts: 2,225
I suggest getting a screw in comp tester. You can get a cheap one from places like Kame Apart. It may not be very accurate, but it will give you an idea. A good tester will run about $150.00, but it isn't necessary. Pull all the plugs and ground the coil wire like the guy says. You can do this with the engine hot or cold. It isn't that important. Post the results here. If you lost only one cylinder that fast, I suspect a broken valve spring.
__________________
Auto Zentral Ltd.
Reply With Quote
  #8  
Old 05-30-2006, 11:21 AM
Registered User
 
Join Date: Aug 1999
Location: Florida / N.H.
Posts: 8,804
<<.I don't understand how people can make something as easy as checking compression in an engine so difficult.>>

This is a Forum consisting of Owners and Techs..........
Something as simple as compression to a Tech is not simple to some of the owner members.....that is what we try to do here .
If you visit the Tech Only Forum, your observation may be valid.........
Reply With Quote
  #9  
Old 05-30-2006, 06:50 PM
ltack1950
 
Join Date: Apr 2006
Location: Elkhorn City, Kentucky
Posts: 40
orginal post

had time 2 work on 87 2.3 replaced 2 injectors (used that i knew where good) no change unhooked the wires on ingit. mod, it sounded all right to me, but im just above average "shade tree". going 2 borrow scew in comp. tester tommorrow thanks for everybodys input i have a lot of parts to start changing out will get back after all cyl has been checked
Reply With Quote
  #10  
Old 05-30-2006, 07:36 PM
t walgamuth's Avatar
dieselarchitect
 
Join Date: Apr 2005
Location: Lafayette Indiana
Posts: 35,538
another sudden loss possibility is a stuck valve. it would be accompanied by a lot of blue smoke. a broken valve or spring would too.

but a screw in compression tester is a must.

tom w
__________________
[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.
Reply With Quote
  #11  
Old 05-31-2006, 03:47 PM
ltack1950
 
Join Date: Apr 2006
Location: Elkhorn City, Kentucky
Posts: 40
orginal post

87 2.3 pulled valve cover, visual looked ok while running. ran compression chk. with professonal grade tester
#1- 55 lbs
#2- 75
#3- 170
#4- 175+-- should need at least 125 lbs to run fair, i think
going to pull head, maybe headgasket blown between cyl. or it has to be in the valves, going to find a large shade tree..
Reply With Quote
  #12  
Old 05-31-2006, 05:53 PM
Registered User
 
Join Date: Jul 2004
Location: York, PA
Posts: 621
Yep the last two are normal, well actually at the higher end, the first two are having issues.....
__________________
~Jamie
_________________
2003 Pewter C230K SC C1, C4, C5, C7, heated seats, CD Changer, and 6 Speed. ContiExtremes on the C7's.

1986 190E 2.3 Black, Auto, Mods to come soon.....
Reply With Quote
  #13  
Old 05-31-2006, 06:55 PM
t walgamuth's Avatar
dieselarchitect
 
Join Date: Apr 2005
Location: Lafayette Indiana
Posts: 35,538
i once blew between cylinders on my 1960 simca. when it fired there was an odd popping hollow sound on those two.

tom w
__________________
[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.
Reply With Quote
  #14  
Old 05-31-2006, 08:05 PM
Registered User
 
Join Date: Apr 2006
Location: tx
Posts: 55
Wink Trans Fluid......

Using a funnel, add a bit of trans fluid to the cylinder, do the compression test again. If the PSI is:

Higher = Faulty Compression Rings on Piston

Same = Cylinder Head (gasket) related problem.

Just my $0.02

Prevost3K
__________________
1989 MERCEDES-BENZ 190E 2.6L GAS/AUTO [LOADED]
1989 MERCEDES-BENZ 190E 2.6L GAS/AUTO [PARTS CAR]**Do you need a part? PM me**
1997 ISUZU TROOPER LIMITED 4X4 [LOADED][/FONT]
Reply With Quote
  #15  
Old 06-01-2006, 01:13 AM
haasman's Avatar
Registered User
 
Join Date: Jun 2001
Location: San Francisco, CA
Posts: 3,097
If it were my car, I'd change the oil to a Diesel rated 15w-40 and drive it as hard and hot as I could. The diesel oil does clean gunked valve lifters. Then recheck the compression.

The previous 190 I had was an '87 2.3. I thought it was a basket case but the more I looked the more I found simple maintenance neglect caused a lot of problems (infrequent oil changes, old fuel filter etc).

Haasman

__________________
'03 E320 Wagon-Sold
'95 E320 Wagon-Went to Ex
'93 190E 2.6-Wrecked
'91 300E-Went to Ex
'65 911 Coupe (#302580)
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 12:45 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