Exhaust elbows

[ashtead]

After 9 years mine has just been replaced and the inside looked 50% blocked. Is this normal on a volvo40hp?

 

[migs]

Yes, our exhaust elbow was exactly the same. after 9 years and 1000 hours.

 

[38mess]

Yes, some people clean them up, but mine was too far gone..a new stainless elbow for my Perkins M30 from parts4engines was £250

 

[peteK]

Availabl on ebay for £120-£130.

 

[Ray Purchase]

Why they don't come with a stainless one from new is beyond me, replacement parts market I suppose.

 

[oldgit]

this was only held together by the clips at each end.
a slighty less knackered one

 

[Poignard]

Blockage was never a problem with BUKH DV10 elbows.

The bloody things cracked before they had time to become blocked!

 

[scottie]

View attachment 179674
this was only held together by the clips at each end.
a slighty less knackered one View attachment 179675

You have great faith in fairy liquid if you expect it to clean that up successfully!

 

[vyv_cox]

Blockage was never a problem with BUKH DV10 elbows.

The bloody things cracked before they had time to become blocked!

Same with Yanmar GM elbows. Cause is thermal fatigue. Mine is shown towards the bottom of this page Fatigue

 

[oldgit]

Originally the only source of replacement risers was genuine either Volvo Penta or some very similarly priced items from aftermarket importers.
Recall the genuine VP unit costing around £250+ .
Have since seen aftermarket market versions advertised in the past on ebay at £100.00.
Having purchased both , to the casual observer there appeared to be no obvious difference in weight or quality of construction.
Unless the metals used ie. the external cast iron casing and the internal stainless sleeve were of a lower quality.
Harbour a suspicion originally most were sourced from some foundry in China ?

 

[LittleSister]

Blockage was never a problem with BUKH DV10 elbows.

The bloody things cracked before they had time to become blocked!

Lucky Bukh parts are so cheap.

Recall the genuine VP unit costing around £250+ .

Think yourself lucky, the Bukh elbow for my DV36 is £675.

I daren't check my elbow, in case it needs replacing!

 

[38mess]

Availabl on ebay for £120-£130

I bet they are good quality

 

[peteK]

I bet they are good quality

It would be a chance I would take at that price,the picture looks the same as the P4E one,I wonder were they obtain them from?

 

[38mess]

It would be a chance I would take at that price,the picture looks the same as the P4E one,I wonder were they obtain them from?

Well you take that chance then.

 

[wingcommander]

Blockage was never a problem with BUKH DV10 elbows.

The bloody things cracked before they had time to become blocked!

Which is why I carry a spare... which I do believe I purchased from your good self.

 

[oldgit]

Generally now regarded in the MoBo world more as a service item that should really be replaced every few years.
Most of the grief is getting the old riser off( bad enough with nil access to bolt heads + nut corrosion) and then virtually impossible to remove old internal scale.
Normally they fall to bits on removal , makes more economic sense simply change.

 

[ashtead]

Yes I was told as the engine had to be moved for saildrive seal change wise to replace elbow at same time . It seems they have a short life at least from Volvo.

 

[MontyMariner]

About 6 years back, I took my old elbow into a local metal fabricator and he made me a new one in ss for ~£50

 

[Plum]

Yes I was told as the engine had to be moved for saildrive seal change wise to replace elbow at same time . It seems they have a short life at least from Volvo.

There appears to be a wide variability on how long they last. Changed my VP elbow at 20 years 1500hrs. The casting was still good and sound but replaced as it was getting difficult to clean the deposits from the cavity.

www.solocoastalsailing.co.uk

 

[neil_s]

This is the home-made exhaust bend off my Bukh DV20. The hole appeared as I was trying to shift the carbon build up. Notice that the hole is on the exhaust side, before the water injection point. It lasted 13 years.