injector removal

[todda323]

I apologize if this has been asked before but I had a question about popping injectors. From what I have read here there is a lot of info about removal and the one thing I gather is that using a removal tool is recommended. Some folks have popped their injectors with compression and they fly everywhere. Could the hold down plate be backed off enough to hold them from flying out but give enough gap to let them unseat without damaging the injector. What would drawbacks be to my theory. I want to do a compression test and clean my old injectors and do not want to damage them or have to replace them of not needed.

 

[284 International]

The general consensus seems to be that it is a bad idea to use compression to pop the injectors out with compression whether they are retained or not.

Having said that, I did exactly what you describe on my YM240, and suffered no apparent ill effects, but there must be some reason Yanmar would advise against doing it that way, and additionally provide special tools to facilitate injector removal.

 

[California]

Regardless of breaking them loose, pulling my YM240's injectors up out of the 2 inch recess required an extremely heavy pull all the way up due to 30 years of rust and dirt locking them in.

I think every case is going to be different, maybe mine was worst-case.

 

[todda323]

I guess the main reason I ask is that I know manufacturers of mechanical products, not necessarily yanmar, have been known to create such consumer headaches for profit. In other words volkswagen designs certain headlight assemblies so that the bulb has to be replaced by removing entire assembly which can only be removed with a special tool made by volkswagen and made available to their authorized service depts as I have been told.

I definitely can't afford to replace 2 injectors but if there is a specific drawback to one way versus another I will play it safe. I don't play the lotto when it comes to the little 1700 that has treated me so well.

 

[dfkrug]

Regardless of breaking them loose, pulling my YM240's injectors up out of
the 2 inch recess required an extremely heavy pull all the way up due to 30 years of rust and dirt locking them in.

I think every case is going to be different, maybe mine was worst-case.

Same here, and the tractors were only 10y old. There was also a plastic spacer down in the well which
took some effort to get out.

 

[normde2001]

I apologize if this has been asked before but I had a question about popping injectors. From what I have read here there is a lot of info about removal and the one thing I gather is that using a removal tool is recommended. Some folks have popped their injectors with compression and they fly everywhere. Could the hold down plate be backed off enough to hold them from flying out but give enough gap to let them unseat without damaging the injector. What would drawbacks be to my theory. I want to do a compression test and clean my old injectors and do not want to damage them or have to replace them of not needed.

You are referring to a common sense method that should be used in removing anything, (wheel/gear), with a puller. there is no reason not to try it. Second best is to remove studs and get on injectors with vise-grips after liberal soaking with PB Blaster.

 

[todda323]

I just want to make sure I'm not being dense here and reading right. As I understand there's nothing wrong with trying to pop them using the plate to restrict them but there's chance they'll be too stuck to break them totally free? I apologize if I'm reading wrong and please correct me If I'm wrong but want to make sure before I jump in next weekend. Not much of a mechanic and learning as I go. Thanks for the replies. Can't say how much I appreciate the help

 

[todda323]

Sorry I missed your post 284. Ok. Got it and I think I'm tracking.

 

[kenmac]

I don't see where there would be any problems with trying to pop them out. Give it a try. just don't let them shoot out and hit the floor and break.. They maybe frozen in place and not just pop out

 

[California]

My neighbor - third generation apple orchardist and owns some 20 diesels, mostly elderly ones - told me he never uses the compression pop method because he has heard too many stories from friends where the restraint broke and shot the injector far away, damaging it. He said that method is right up there with using starting fluid in a small diesel; how amateurs turn small problems into big problems.

FWIW - that's just one (experienced mechanic)'s opinion.