Thread: SVO Mishap #1 - Injection pump overhaul

Is there a gauze filter under the banjo on the fuel injection pump? Have you cleaned the guaze filter on the top of the lift pump. Was the old fuel filter clogged up? Have you cleaned out the sedimenter? Have you checked for sludge in the tank?

If you've got crud from the wvo then it's going to be through the whole system.

I had a new one shipped from UK for about $1600, I was quoted about $1200 for a rebuild on the old one.

Simon

I had a 300tdi running on SVO with no problems. I plumbed the heat exchange into to heater pipes with no taps and no problems at all. The water ran through it all the time and caused nil issues. Running on SVO or Diesel. I agree with other posts check the filter under the banjo bolt.

Originally Posted by abaddonxi

Is there a gauze filter under the banjo on the fuel injection pump? Have you cleaned the gauze filter on the top of the lift pump.

Nope, and nope. For the simple reason that I didn't know that there were filters there. However, fuel is getting to the injection pump, therefore I can assume that the lift pump filter is not blocked.

Was the old fuel filter clogged up?

It didn't seem to be. However, as a precaution (and because it was due a filter change anyways), I put in a new one.

Have you cleaned out the sedimenter? Have you checked for sludge in the tank?

Yes I have. I've also drained the tank and filled it with fresh diesel.

I had a new one shipped from UK for about $1600, I was quoted about $1200 for a rebuild on the old one.

I got a quote today for $650 for a secondhand one. Guess I should count myself lucky??? Did you install your replacement pump yourself? Any issues??

As the others have pointed out, catastrophic failure of the IP is highly unlikely. The Bosch VE pump tolerates SVO well - even one-tank systems.

Maybe try heating up the IP (gently) with a propane torch or similar to clear any blockages.

I absolutely hope that you are right - an injector pump replacement is certainly something I can't afford at the moment. What's worrying me though is that for about an hour beforehand there was a constant ticking sound coming from the engine. I didn't think too much of it at the time, but reading varios posts since, it seems to be a symptom of a failing injection pump.

If it is dead it may be unrelated. Some versions are known for the case hardening flaking off and killing the pump.

If you remove the fuel cutoff solenoid you should be able to see if there are any metal flakes in there.

I personally would be wary of buying a SH pump with unknown history. A rebuild shouldn't be much more than 1K if you shop around.

All the above is assuming the pump is actually dead.

Another problem with older pumps - pre-96 - is that they might not have viton/vitron seals - wvo resistant.

Simon

and another problem might be the person servicing it . As it turns out, it was the fuel cutoff solenoid that was faulty, and thankfully a much cheaper fix than an entire injection pump. But there's always a silver lining - the money I would have paid for a pump is now going towards some toys that I wanted to get for quite a while. so win, win situation

Thanks for all the suggestions - much appreciated.