Re: diesel battery

Posted by jdemaris on March 08, 2006 at 17:31:19 from (66.218.25.87):

In Reply to: diesel battery posted by mshadow on March 08, 2006 at 17:06:37:

When it does first start - does it sound okay - or does it skip and smoke?
I'm not an Oliver expert (most of my experience is Deere, Detroit, AC, and Case), but all of the American built Oliver diesels I've worked on were direct injected - so there are no glow-plugs. If that's the case, you take the injectors out and check the compression through an injector hole with an adapter.
Engine cranking speed is very important for good starting with a diesel. If you can't tell for sure just by the sound of it, hook a voltmeter to the starter post when cranking. It should be 9-9.5 volts. If it's lower, you probably need more battery (or better connections). One volt at cranking makes a huge difference. You could just try putting jumper cables on it from a second battery source and see if it starts better. Of course, it might even have the wrong and undersized starter - if so - no amount of batteries will make the engine spin fast.
In regard to cold-starting and other problems. If the compression is low, it should skip and smoke more than usual when cold. In regard to the injection pump, it's pretty unlikely that it is going to affect cold-starting if it's working okay once warm. Especially a distributor pump - if it has a Roosamaster. When they get worn, they tend to start hard when the engine gets hot - not cold. If the fuel-delivery is set too low on the pump, it WILL start very hard when cold, but will also be underpowered when warm. With the injectors, even if they are really beat, if they're working well enough for the engine to run okay, it's very unlikely they will effect cold starting. I've pulled injectors out of good staring engines that barely worked at all and just dribbled fuel.
There are many other things to cause the problem, especially if it's been this way since you owned it. I could write a long essay on it, but I'm not sure you're interested.

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