SailNet Community - View Single Post - How to identify a problem diesel?
View Single Post
  #1  
Old 05-02-2009
davidpm's Avatar
davidpm davidpm is offline
Senior Member
 
Join Date: Oct 2007
Location: Madison
Posts: 3,701
Thanks: 166
Thanked 40 Times in 33 Posts
Rep Power: 7
davidpm is on a distinguished road
How to identify a problem diesel?

I have the opportunity to spend a lot of time aboad a boat with a Universal M25 that I belive is on its way out. We had a compression test and it is really low. It also stopped once due to overheating. So I got to thinking what would give this engine away if I didn't know it so well?

It starts easy. Glow plug for 30 seconds, starts immediately.
White smoke for 45 seconds
No venting from the crankcase overflow tube.

The above would lead one to belive that something is amis but maybe not too bad. I know better.

There is a bad smell below but that could be attributed to a simple exhaust problem.

So what would I look for to confirm the low compression diagnosis?
I see this as an opportunity to improve my surveyor skills.
I have some inside knowledge, how could I deduce the state of the engine from more subtle clues?
Reply With Quote Share with Facebook