Volvo Exhaust Elbow

[sailaboutvic]

Volvo Exhaust Elbow the water jacket in side has carbon up and is letting very little water through I have manage to clean some of it away , as anyone have any idea in what solution it would be best to soak it in to clean it ,
Thanks

 

[daleboutm]

Which type of motor?

 

[nigelmercier]

I don't think that anything will remove carbon, but I'm happy to be corrected. Be careful, as I scraped away at the carbon I stuck a screwdriver through the side. It was better that it went at that moment, I guess.

 

[duncan99210]

Most of the stuff is likely to be carbon so the only way you can remove it is to chip it gently away. May be best to replace the elbow as they get weakened over time.

 

[sailaboutvic]

Which type of motor?

Volvo d2 40 only done 200 hours , I have this problem on other Volvo engine and I did manage to soak it in some thing and it came out like new , but I can't remember what it was , It was some years back .
New part to replace is over £200 if not more , so I rather clean it .

 

[nigelmercier]

Volvo d2 40 only done 200 hours...

Then something is surely wrong somewhere?

UPDATE: I've read elsewhere "you can use methanol type paint stripper, it should say on the label methanol or methylene-dichloride" so Nitromors might help. Assuming that it is still the same, and not made of flour and water due to H&S interference.

 

[malcp]

Volvo d2 40 only done 200 hours , I have this problem on other Volvo engine and I did manage to soak it in some thing and it came out like new , but I can't remember what it was , It was some years back .
New part to replace is over £200 if not more , so I rather clean it .

Could it have been Spirit of Salts? I had the same problem some years ago and used it successfully in conjunction with chipping with an old chisel. I remember the elbow getting quite hot with chemical reaction. Still ended up replacing the elbow as I managed to put the chisel through the inner sleeve!

 

[sailaboutvic]

Then something is surely wrong somewhere?

UPDATE: I've read elsewhere "you can use methanol type paint stripper, it should say on the label methanol or methylene-dichloride" so Nitromors might help. Assuming that it is still the same, and not made of flour and water due to H&S interference.

Sorry it 1200 hours ,

It could had been spirit of salt , so long ago now

 

[nigelmercier]

It could had been spirit of salt , so long ago now

Spirits of Salts is Hydrochloric Acid. It does not react with Carbon, but it is used as alloy wheel cleaner, so it may break up the gunk binding it together.

 

[Grumpybear]

What about oven cleaner?

 

[Lofty]

This may be an answer

I have a VP2-40 but I had a problem with the engine being too close to the waterline which left a danger of the engine getting flooded. My answer was to have a stainless steel exhaust made. This provided a much higher loop to carry the exhaust water above the water line. The water is injected into the exhaust on the downward side of the exhaust. This has seen two seasons now and is still giving good service. This may not be your problem but none the less it could be a much cheaper answer.

I will try to attach a photo to this message. If this does not work I will E-mail you the photo if you want it.