Is removing/refitting injectors not for the faint hearted?

[Jabamusic]

Just wondering whether the removal and refitting of the injectors on a Yanmar 3GM30 is something that is easily managed?

I would like to get them pop-tested and a local diesel engineer will happily do them for few £'s if I can get them to him.

Anybody done this job recently/at all and can offer some words of advice/wisdom?

Thanks

 

[sailorman]

how many hrs on the engine, if it aint broke dont fix it

 

[NUTMEG]

In my experience they should not present any probs. couple of nuts and pipes to remove. But they can stick and be b***ers to shift sometimes. Good luck!

 

[chrishelen]

If they are stuck after the retaining bolts are removed, they can sometimes be dislodged by turning the engine over on the starter

 

[Topcat47]

I had the one on my 11GM10 done last winter. It was stuck in the head so fast I had to have it pressed out, the doing of which broke the pre-combustion chamber. I'd had a FW drip onto the head for three years which contributed to the problems. It's a good idea to do this regularly and the key is the needle vale in the injector body(I did the one on my previous engine, a MD1b when I got the boat and five years later; THAT injector came out fine). You can also get the injectors calibrated to the pump which is a good idea when you have a three cylinder engine.

 

[GrumpyOldGit]

Piece of cake, just make sure that the little copper sealing washers dont get dropped when you pull the injectors out, they normally stay in the bottom of the hole or sometimes stick to the bottom of the injectors,

 

[savageseadog]

Just wondering whether the removal and refitting of the injectors on a Yanmar 3GM30 is something that is easily managed?

I would like to get them pop-tested and a local diesel engineer will happily do them for few £'s if I can get them to him.

Anybody done this job recently/at all and can offer some words of advice/wisdom?

Thanks

It's quite possible that the diesel engineer might not have a test adapter for a Yanmar, suggest you check if you haven't already. The other advice to leave alone unless you're certain there is a problem is a good one. The injection system is one of the more reliable elements of a diesel installation.

 

[NormanS]

If they are stuck after the retaining bolts are removed, they can sometimes be dislodged by turning the engine over on the starter

That sounds pretty dangerous. If you must do it that way, slacken the nuts, but don't take them off completely. The idea of an injector flying round.......

 

[alant]

Just wondering whether the removal and refitting of the injectors on a Yanmar 3GM30 is something that is easily managed?

I would like to get them pop-tested and a local diesel engineer will happily do them for few £'s if I can get them to him.

Anybody done this job recently/at all and can offer some words of advice/wisdom?

Thanks

Apparently, taking them off a warm engine is best.

 

[Slinky Spring]

I had a puller made for this after all other efforts failed. Lovely piece of kit. If you do have problems shifting them as I did on my 1GM10, I could lend you said puller if you cover the postage

 

[30boat]

When you put them back in make sure you use new washers and if there's a cupped washer it has a right way of going in.Check with the workshop manual.

 

[AntarcticPilot]

You're OK with a Volvo 200x series as long as the copper sleeves aren't damaged. If they are, then you need special tools to remove and replace them.

 

[KenMcCulloch]

You're OK with a Volvo 200x series as long as the copper sleeves aren't damaged. If they are, then you need special tools to remove and replace them.

And this advice is useful to the OP in what respects?

 

[AntarcticPilot]

And this advice is useful to the OP in what respects?

None whatever, but it may contribute to the sum of knowledge concerning injectors in general. I thought the thread has already drifted - there seem to be contributions about other makes/models than the OPs.

 

[TQA]

Does your engine start easily?

Does your engine produce LOTS of smoke under load.

If you answer YES then NO leave the bu**ers alone.

 

[charles_reed]

Easy - have them calibrated and reset by a diesel injector specialist near you and when replacing either use new or re-annealed copper washers.

Diesel specialists are not common, ask in an HGV workshop for who they use, sometimes you can even get it done for free...

 

[30boat]

And this advice is useful to the OP in what respects?

That was a tad unpleasant,no?

 

[Jabamusic]

Thanks for the responses thus far............clearly split between "YES- go for it" and "leave well alone" !!

The primary reason for thinking about doing it, is the engine is lumpy at tick-over. I have adjusted the rate at t/over to the recommended revs, but I'm still not happy .
Apart from that it runs very well and starts OK?

Jaba

 

[duncan99210]

Then let well alone! A lumpy tickover is not worth stripping put the injectors - and it may not cure the problem......

 

[simh77]

I had a puller made for this after all other efforts failed. Lovely piece of kit. If you do have problems shifting them as I did on my 1GM10, I could lend you said puller if you cover the postage

Hi. I am currently trying to remove a rusted injector from my 1GM10.
Is there a chance I can borrow your puller? Happy to cover the postage costs.