Will this work as a header tank arrangement?

[BoatingBeginner]

The usual wet manifold/header tank arrangement looks like this

Bowman make quite an expensive alternative like this

But I found a lower and more elegant solution like this, with the header tank seemingly just integrated into the lower Cummins wet manifold

How is this working? Doesn't the header tank need to be of a certain size?

 

[rafiki_]

It is all about balancing pressure and volume. Latestarter is our forum Cummins expert. I guess he'll be along at some point, but you might need to bump your thread up to the top for him to catch it.

 

[BoatingBeginner]

Thanks very much for that.

I've found more photos of the same setup. It dates from the mid-80s.

It seems to be a dry stack exhaust - and may even be keel cooled - not that this would affect the temperatures and pressures of the engine coolant, surely?

Just all looks so neat.

 

[Latestarter1]

Sorry guys I have been unwell, still not 100%

Quite simply no!

Cummins tried this set up on some of the very first B Series marine engines.

Fitted 14 psi filler cap into alternative turbocharger top mounting. Only sold engines for about a year with this set up before marine guys were stamped on for having totally inadequate coolant draw down down.

Gen II was eqally Pi55 poor arrangement with tiny corner header tank, this sold for just over another year. All done by couch engineers who had never seen a boat.

When swamped with complaints regarding exhaust manifold cracking did they get some proper engineers to re-visit the whole design.

I will give you the complete heads up when logging is is not costing me $$$$

 

[BoatingBeginner]

Sorry guys I have been unwell, still not 100%

Quite simply no!

Cummins tried this set up on some of the very first B Series marine engines.

Fitted 14 psi filler cap into alternative turbocharger top mounting. Only sold engines for about a year with this set up before marine guys were stamped on for having totally inadequate coolant draw down down.

Gen II was eqally Pi55 poor arrangement with tiny corner header tank, this sold for just over another year. All done by couch engineers who had never seen a boat.

When swamped with complaints regarding exhaust manifold cracking did they get some proper engineers to re-visit the whole design.

I will give you the complete heads up when logging is is not costing me $$$$

Brilliant - thanks, Paul

I've just found this, now I've been introduced to the concept of coolant draw down (had never heard of it!) http://www.cumminspower.com/www/literature/applicationmanuals/t-030_p93-115.pdf - it relates to generators, but seems to outline a few of the basic concepts well enough.

It seem that there's also SAE standards covering this, too http://standards.sae.org/j1436_200407/

Presumably the manifolds cracked simply due to overheating?