Yanmar - Extracting Injectors

[Talulah]

Yanmar 4JH4E

I'm trying to extract the diesel injectors.
3 of 4 out but the fourth is stuck in.
The injectors are 729645-53100
http://au.alibaba.com/product/745139231-4TNV88-ZX50U-2-YM729645-53100-729645.html

The first three I was just able to put some grips on, twist them back and forth a little and pull them out.
What tool could I use to extract the last one?

Would one of these fit?
http://www.ebay.co.uk/itm/Diesel-In...t=UK_Hand_Tools_Equipment&hash=item5d35acb60a

Many thanks in advance.

 

[Topcat47]

I had to take the head off my 1GM10 and have it pressed out in a shop. The pre-ignition chamber was 8uggered in the process which meant that had to be replaced as well. Thankfully it's not a regular occurrence. Once out, the injector was easily serviced by Panda in Fareham, as was the fuel pump.

Good luck.

 

[Talulah]

I had to take the head off my 1GM10 and have it pressed out in a shop. The pre-ignition chamber was 8uggered in the process which meant that had to be replaced as well. Thankfully it's not a regular occurrence. Once out, the injector was easily serviced by Panda in Fareham, as was the fuel pump.

Good luck.

That sounds like an expensive mistake.
(The injectors I did get out have gone to Panda in Fareham as well.)

I have a new one that I can use to replace the stuck injector should I get it out next weekend so cleaning the fourth injector is not important.
I'll try penetrating oil next weekend.
If that fails I reassemble everything but with a loose clamp on the fourth injector to see if it will get blown (exploded) loose.

 

[Topcat47]

Not really a mistake, I had a Fresh water leak onto the head. The injector was stuck in with a mixture of corrosion products and gunge. I used release agents and heat but it wouldn't budge, at least with the force I was prepared to use. It did come out in the press, but the pre-combustion chamber collapsed under the load. The Law of 5od, catches everyone sooner or later.

 

[Talulah]

I suspect that my injector is stuck in for the same reason. Immediately above it are the two take off pipes where the coolant goes to the calorifier. The odd drip or two would directly fall around the injector.

 

[Talulah]

The forth injector is out. I borrowed a slide hammer from Panda Diesel in Fareham. (Many thanks)
View attachment 30026
The serviced injectors are now all back in and the engine up and running again.

 

[sailorman]

The forth injector is out. I borrowed a slide hammer from Panda Diesel in Fareham. (Many thanks)
View attachment 30026
The serviced injectors are now all back in and the engine up and running again.

Is it running any better than before

 

[Talulah]

I've not noticed much difference quite frankly but I've only been running it in the marina. I've not been out. Too b****y cold.

 

[sailorman]

I've not noticed much difference quite frankly but I've only been running it in the marina. I've not been out. Too b****y cold.

How many hrs has the engine run

 

[Talulah]

2500

 

[sailorman]

2500

on my 4108 at 2200 hrs i left the injectors in & changed the engine

 

[Talulah]

10pm is a bit late to change an engine ;-)

 

[sailorman]

10pm is a bit late to change an engine ;-)

22.00z
i did the engine swap 10 yrs ago & racked up 1000hrs on the new one

 

[Talulah]

1000 hrs in ten years. I wish. I estimate 500 hours a year for us.
However, I understand from our Volvo dealer that most boats are racking up at rate one tenth of that.

 

[sailorman]

1000 hrs in ten years. I wish. I estimate 500 hours a year for us.
However, I understand from our Volvo dealer that most boats are racking up at rate one tenth of that.

when i fitted the new Nanni in November, i had the chance to pop out over the winter on engine runs. that enables a real run-in, not run for 10 mins & turn off