CAV Injection pumps problem.

[Jcorstorphine]

I am in a dilemma over the best route forward regarding problems with my Ford 1600 diesel engine.

Last season, I had a problem when the engine started to make a horrendous knocking noise which was traced to one of the injectors having a small piece of steel stuck in it. The thought was that it may have been debris from the high pressure fuel lines so these were cleaned by blasting the insides with a connection to a pressure washer and dried with some acetone.

The engine ran perfectly for about 20 hours but just as we were getting the boat pulled out for the winter, the knocking noise came back indicating yet another injector misfiring.

Latest advice I have been given is that it may be the CAV DPA pump breaking up, one theory being the “bearing” starting to fail.

I have two alternatives thses being to get my existing pump stripped, the alternative being to get my spare DPA pump checked which was bought on Ebay as being fully serviced! but was it?

The advantage of using my existing pump is that it can go direct back on timing marks but apparently, a new pump will require the timing to be reset. Advantage of getting my (possibly) fully serviced pump checked is that it should only require the seals changed as it has been lying in the garage of about 7 years.

Any thoughts or shared experience with CAV DPA Pumps.

Also posted on MBO forum

 

[savageseadog]

I wouldn't bother getting the old pump serviced if you have a working spare. Your spare may well be slightly different in timing to your existing one, you have a number of choices I would suggest:

1: Bodge it! Scribe a line on the pump and engine and put the new pump onto the same mark, it won't be greatly different and will probably not affect performace much. You can tell from the smoke and engine noise if it's about right.

2: CAV pumps will have a timing correction somewhere on the body. Have a Google and identify what it looks like. If you're lucky your spare might well be the same or very close so idea 1 might be spot on.

3: Use a CAV timing kit and do a static timing adjustment with the dial gauge etc. They aren't very expensive and the timing will be close to optimum.

4) Use an electronic timing system, perhaps hire it.

 

[pampas]

Some have a1/8" hole near the drive end for a peg. and a scribe line on the drive coupling, line up the scribe line vertically and put a 2" long peg down the hole, this will drop into a hidden hole in the shaft. That gives you the correct firing order and being locked the timing position. final check is to rotate engine to the manufactures firing postion and then insert pump.

Easier to do than explain, Yours may not have this. Best of luck.

 

[ianj99]

I am in a dilemma over the best route forward regarding problems with my Ford 1600 diesel engine.

Last season, I had a problem when the engine started to make a horrendous knocking noise which was traced to one of the injectors having a small piece of steel stuck in it. The thought was that it may have been debris from the high pressure fuel lines so these were cleaned by blasting the insides with a connection to a pressure washer and dried with some acetone.

The engine ran perfectly for about 20 hours but just as we were getting the boat pulled out for the winter, the knocking noise came back indicating yet another injector misfiring.

Latest advice I have been given is that it may be the CAV DPA pump breaking up, one theory being the “bearing” starting to fail.

I have two alternatives thses being to get my existing pump stripped, the alternative being to get my spare DPA pump checked which was bought on Ebay as being fully serviced! but was it?

The advantage of using my existing pump is that it can go direct back on timing marks but apparently, a new pump will require the timing to be reset. Advantage of getting my (possibly) fully serviced pump checked is that it should only require the seals changed as it has been lying in the garage of about 7 years.

Any thoughts or shared experience with CAV DPA Pumps.

Also posted on MBO forum

I have sent the DPA pump off my Perkins 4108 to a company in Wokingham that I and many others have used.

http://Lynxdiesels.com

Alan will doubtless be able to overhaul it and possibly offer guidance on how to retime it. (or even set it for you so you'd just need to line up the engine's timing marks when no1 cyl is on its compresion stroke)

Worth giving him a call.

Ianj