While changing the hoses at our 1978 J&T 6-71N Shower Heads I see the inside surfaces are heavily corroded. I tried to see the business end with a small mechanics mirror but could not. We are not having any cooling issues at this time. Our Heads are the 90 degree bolt-on model and J&T has them (now in stainless) for $1175.00 ea. I've been searching the archives here and there's not much on Shower Heads getting replaced. We're still newbies and welcome any thoughts, thanks Craig
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Raw water Shower Heads
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Re: Raw water Shower Heads
How about a picture? If they're the full water jacket style 39 years is a long time, if they're the type with insulated blanket and just a water shower head 39 years is also probably a long time too. J&T is buying them from somebody and probably adding at least 50%, you might want to call some of the exhaust manufacturers to compare. I prefer the ones with the hard coating for the hot section.
CRICKET
1966 HAT50C101
Purchased 1985 12v71Ns
Repowered 1989 with 8v92TI
Repowered 2001 with 3406E
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12-11-2017 05:18 PM #3Senior Member
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- Apr 2008
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Re: Raw water Shower Heads
Marine manifold, in Farmingdale, NY, made many of the J & T exhaust parts
. Might be able to save a few $$.GLORY Hull # 365
Northport, NY
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12-11-2017 05:23 PM #4Senior Member
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- Mar 2007
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Re: Raw water Shower Heads
I just had mine replaced in my 1995 boat. I was told I could go a little longer but elected not to. If you are comfortable spending the money I would do it.
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12-11-2017 05:34 PM #5Registered Member
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- Mar 2017
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Re: Raw water Shower Heads
I am also a newbe to the Detroit Diesel 671N's. What are the shower heads you are speaking of? Their purpose.
Thanks,
Chris
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Re: Raw water Shower Heads
The showerhead is on the exhaust hose connection side of the exhaust "riser" ( or elbow), it's where raw water is injected to cool the exhaust gas. Basically 3 styles, insulated hardcoat or water jacketed or insulated with blanket. The insulated elbows just have the water entering the "shower head" on the end. Not sure what the manifold end/connection outlet on a 671N looks like, the 2 elbows in the photos would attach to a turbo, just need to make sure to get an exact match.
exhaustelbow.jpgexhaustelbowjacketed.jpgexhaustelbowblanket.jpgLast edited by Cricket; 12-11-2017 at 06:04 PM.
CRICKET
1966 HAT50C101
Purchased 1985 12v71Ns
Repowered 1989 with 8v92TI
Repowered 2001 with 3406E