Replacing my injectors but...

[Cerebus]

I'm in the process of replacing my injectors but is this over the top for a copper washer?
Injector Pre Combustion Washer 000D8497

Very over the top !

 

[Stemar]

Annealing with a gas torch really is easy. But if there is an impurity they can flare out then they are no use..

I don't trust the scewfix type multiselection boxes. They are too cheap, to my mind, to be 100% copper. Ok for a banjo where if it doesn't work you just chuck and pick another.

Halfords i trust.

If it's a really critical application in a nuclear reactor, it might matter, but this is just a washer, soft enough to seal the injector, but hard enough to withstand the temperature and pressure. I'm no metallurgist, but I very much doubt that those washers are anything special.

As for trusting Halfrauds, more than Temu, certainly, but Screwfix? I'd be very surprised if there was any difference in the quality of their copper washers

 

[CluelessSailor]

If it's a really critical application in a nuclear reactor, it might matter, but this is just a washer, soft enough to seal the injector, but hard enough to withstand the temperature and pressure. I'm no metallurgist, but I very much doubt that those washers are anything special.

As for trusting Halfrauds, more than Temu, certainly, but Screwfix? I'd be very surprised if there was any difference in the quality of their copper washers

This is what's frustrating. I can buy copper seating washers from the local car parts dealer for 23p yet ones specifically for Bukh are nearly £20 each. If I knew the size of the washer needed I would simply buy one for 97% cheaper

 

[James_Calvert]

Perhaps, but the spare parts manual lists item part number as 000D8497 which on the net they come up as copper washers. I can't find an official specification at all:

Copper ring pre-chamber Bukh DV10 Bukh DV20 000D8497

That's item 25 on the parts list. It goes between the precombustion chamber and the cylinder head.

I thought you might want item 27, which fits between the injector and the chamber. Which is not a copper washer.

 

[CluelessSailor]

That's item 25 on the parts list. It goes between the precombustion chamber and the cylinder head.

I thought you might want item 27, which fits between the injector and the chamber. Which is not a copper washer.

That's correct. The injector itself is good. It's between the pre-combustion chamber and cylinder head then. There is a reason my username is "CluelessSailor"!

The actual specification are just not available. I have even contacted Bukh in Poland and they have quoted me €30 EACH and that's before shipping!

Ouch.

 

[Boater Sam]

The Free market economy. Wonderful isn't it?
Stop being so pedantic, just buy some copper washers, they will be fine.
Better still, anneal the old ones then you have the original spec washer. Even diesel workshops anneal washers if they are an odd size, its accepted engineering practice.

 

[CluelessSailor]

The Free market economy. Wonderful isn't it?
Stop being so pedantic, just buy some copper washers, they will be fine.
Better still, anneal the old ones then you have the original spec washer. Even diesel workshops anneal washers if they are an odd size, its accepted engineering practice.

I'm unfamiliar with engines so didn't want to get the wrong size or spec and risk damage.

Also I don't have the old ones - there were none present when I removed the injectors!

 

[Ammonite]

I'm unfamiliar with engines so didn't want to get the wrong size or spec and risk damage.

Also I don't have the old ones - there were none present when I removed the injectors!

I'd be very surprised if that was the case. Most likely they are stuck fast in the head, which is what normally happens, and you'll need one of these to remove them
Pardon our interruption...

 

[IanCC]

If it's a really critical application in a nuclear reactor, it might matter, but this is just a washer, soft enough to seal the injector, but hard enough to withstand the temperature and pressure. I'm no metallurgist, but I very much doubt that those washers are anything special.

As for trusting Halfrauds, more than Temu, certainly, but Screwfix? I'd be very surprised if there was any difference in the quality of their copper washers

The big difference is that, as far as i can tell, neither screwfix or toolstation sell them anymore which, it could be argued, tells its own story. For what it is worth i have really struggled to seal stuff with washers from the multi packs, whereas with genuine yanmar or halfords all it takes is a little nudge from a spanner and you are done. I am sure there are others who sell good copper washers.

 

[Cerebus]

If having difficulty getting exact washer, take old one to an industrial estate where matching occurs; milling, lathe work.

I would be surprised if someone would not modify or even make a set of washers for the price of a couple of beers.

 

[Cerebus]

I'd be very surprised if that was the case. Most likely they are stuck fast in the head, which is what normally happens, and you'll need one of these to remove them
Pardon our interruption...

On that tool on Ebay, what is the sliding silver alloy bit for?

Apart from that it is €10 for a nail almost; certainly a tool anyone with a lathe could knock up in less than 20 minutes. ( less than that if they used a large bolt and turned it down).

 

[Ammonite]

On that tool on Ebay, what is the sliding silver alloy bit for?

Apart from that it is €10 for a nail almost; certainly a tool anyone with a lathe could knock up in less than 20 minutes. ( less than that if they used a large bolt and turned it down).

I don't know what sort of nails you use but that one is over 350mm long, weighs best part of a kilo and incorporates a substantial slide hammer. Its about as far away from a nail as you can get, unless you are building a replica of the Mary Rose!