2nd Gen Ram Tech 1994-2001 Rams: This section is for TECHNICAL discussions only, that involve the 1994 through 2001 Rams. For any non-tech discussions, please direct your attention to the "General discussion/NON-tech" sub sections.

Need help! No compression on one side of engine

Old Jun 5, 2023 | 12:00 AM
  #1  
ddjones1234's Avatar
ddjones1234
Thread Starter
|
Registered User
Joined: Jun 2023
Posts: 2
Likes: 0
From: Pa
Default Need help! No compression on one side of engine

Hi,

I have a 1996 Ram 2500 with a 5.9 v8 and a 5 speed tranny. Truck has 114000 miles on it. I was driving one day and the truck literally just quit on me. I had it towed home and messed with it here and there and the truck always cranked funny like it was skipping. I did a compression test and the passenger side bank had zero compression on all cylinders. Truck still did some what run but very poorly. It also had quite a bit of blow by coming out of the oil fill. This all happened a few years ago and truck has been sitting in my driveway since. I recently have a need for the truck and the means to fix it. Im just not sure where to go next. Heads? Head gaskets? Something stupid I’m missing? Any help would be much appreciated. Thanks!
 
Reply
Old Jun 5, 2023 | 12:27 AM
  #2  
AtomicDog's Avatar
AtomicDog
Champion
10 Year Member
Liked
Loved
Community Favorite
Joined: Sep 2012
Posts: 4,870
Likes: 434
From: Central VA
Default

Sounds like the engine is going to need a complete rebuild. If you're getting blow-by from the oil filler, the rings in the motor are likely shot (at a minimum) and will need to be replaced. Depending on your budget, you can also try to pickup a used engine from a salvage yard or a newly rebuilt engine and swap it out.
 
Reply
Old Jun 5, 2023 | 06:40 AM
  #3  
Moparite's Avatar
Moparite
Grand Champion
Loved
Community Favorite
10 Year Member
Community Builder
Joined: Feb 2015
Posts: 7,435
Likes: 578
Default

I did a compression test and the passenger side bank had zero compression on all cylinders.
Even a bad gasket you will get some kind of compression and not all 4 cylinders. Sounds strange to me, You can do a leak down test to see where the compression is going or take the head off.
 
Reply
Old Jun 5, 2023 | 06:42 AM
  #4  
Robt1959's Avatar
Robt1959
Amateur
Joined: May 2023
Posts: 41
Likes: 7
From: Haleyville Alabama
Default

Had the same thing happen to a 1998 1500 5.2. Had to replace engine.
 
Reply
Old Jun 5, 2023 | 01:13 PM
  #5  
ddjones1234's Avatar
ddjones1234
Thread Starter
|
Registered User
Joined: Jun 2023
Posts: 2
Likes: 0
From: Pa
Default

I’m leaning towards taking the head off. I already have it mostly torn down minus the intake. I was told it could’ve been timing way back when but it’s dead on. It’s still so strange to me that it ran so good for so long and just stopped in the middle of the road completely out of the blue. We loosend the rockers up to see if maybe valves were hanging open but no change. Not even the old oil in the cylinder compression test changed anything.
 
Reply
Old Jun 5, 2023 | 01:46 PM
  #6  
AtomicDog's Avatar
AtomicDog
Champion
10 Year Member
Liked
Loved
Community Favorite
Joined: Sep 2012
Posts: 4,870
Likes: 434
From: Central VA
Default

Sounds like the motor either ran very low on oil or really overheated to have something like that happen. Those engines have historically been very tough to kill.
 
Reply
Old Jun 5, 2023 | 06:00 PM
  #7  
HeyYou's Avatar
HeyYou
Administrator
Veteran: Air Force
Community Favorite
15 Year Member
Community Builder
Joined: Apr 2010
Posts: 87,461
Likes: 4,218
From: Clayton MI
Default

If there is no compression on all four cylinders on one side, that is not a head gasket, not timing either, as it would affect every cylinder, not just one side. I suspect it's new motor time.
 
Reply
Old Jun 6, 2023 | 06:42 AM
  #8  
Moparite's Avatar
Moparite
Grand Champion
Loved
Community Favorite
10 Year Member
Community Builder
Joined: Feb 2015
Posts: 7,435
Likes: 578
Default

Did you verify the pistons are moving? Any metal debris in the oil? Zero psi sounds like you broke 4 rods on one side.Take the plugs out and shine a light down the cylinders then have somebody crank the motor.
 
Reply
Old Jun 6, 2023 | 07:49 AM
  #9  
HeyYou's Avatar
HeyYou
Administrator
Veteran: Air Force
Community Favorite
15 Year Member
Community Builder
Joined: Apr 2010
Posts: 87,461
Likes: 4,218
From: Clayton MI
Default

Originally Posted by Moparite
Did you verify the pistons are moving? Any metal debris in the oil? Zero psi sounds like you broke 4 rods on one side.Take the plugs out and shine a light down the cylinders then have somebody crank the motor.
Bent valves will give zero compression as well.
 
Reply


Thread Tools
Search this Thread

All times are GMT -4. The time now is 05:00 PM.