[C320-list] Heat Exchanger Removal - Perkins M30

[gbaklund at comcast.net]

I have recently installed a new stainless exhaust elbow purchased from Parts4engines. Great price and shipping from DHL was a relatively low cost.  My old elbow had maybe 25% opening. I cleaned out my muffler and made sure there were no cracks.  I used the Shields exhaust hose from West Marine which I bathed in hot water until fitting it to the elbow.  I suggest hose to elbow first then fit to muffler.  Rubber cap from heater exchanger needs to fit over elbow port before pressing the rest of the rubber cap to heat exchange before bolting. Bolted up easily. 
I have a slight leak at my muffler as it is just under 2" OD and hard to get clamps to overcome the angle and tighten enough. I am considering splicing in the fiberglass connector and 2" hump hose from Catalina Direct and will install at muffler side.  My M30 Perkins engine is running nicely at 175, not 160 as it always had.  I had just purchased a new water pump and hoses from TAD Marine as well as T-stat.  all working very nicely.  Shout out to Tacoma Diesel also for their help with parts and info for Perkins engines.

Gregg Baklund
Paradise 1995 #228
Des Moines, WA

-----Original Message-----
From: C320-list <c320-list-bounces at lists.catalina320.com> On Behalf Of Art Harden
Sent: Friday, March 13, 2020 4:19 AM
To: C320-List at catalina320.com
Subject: Re: [C320-list] Heat Exchanger Removal - Perkins M30

Thanks for that tip. I think I might order one. Question I have for the group is what temperature does your engine run at. Mine is usually around 190-195 and higher than what diesels generally run. I don’t get an alarm or steam out the exhaust. I just think it should be lower. I have replaced the impeller and the strainer is clean and when winterizing I have good circulation through the pump, because it will quickly suck down a gallon of antifreeze. Any thoughts. 

Art Harden
Catalina 320 “Tortuga” #243
937-477-5544

> On Mar 12, 2020, at 6:46 PM, Jeff Smith <jeffreyssmith at live.com> wrote:
> 
> To all,
> 
> While we are on this subject, Parts4engines.com <http://parts4engines.com/> sells a stainless steel exhaust outlet designed to replace the cast iron exhaust elbow that suffers from scaling. It is $282 plus shipping (I have not ordered it because I have not confirmed an issue with my elbow yet). I thought I would mention it here. Transatlantic Diesel also sells a stainless steel elbow, but this one appears to be custom fabricated, and it looks like it requires a removal of the exhaust manifold. The Parts4engines.com <http://parts4engines.com/> looks like you only need to unbolt the old elbow and bolt on the new elbow.
> 
> Jeff
> S/V Sailmates
> ’94, #121
> 
>> On Mar 11, 2020, at 8:14 PM, Bob Borelli <cassattC22 at hotmail.com> wrote:
>> 
>> Dave,
>> Thank you!  I would very much like comparison photos!
>> In the back of my mind always 'if it ain't broke...'
>> You also solved my 'hump hose' mystery.
>> Online searching; I have been unable to find a 'hump hose' less than 3" OD.
>> Another one my many plans next trip to the boat - take my 3" micrometer & measure the OD of the exhaust hose to see if I could dummy something up after splitting the hose.
>> I never thought to look on Catalina Direct & certainly not the C350.
>> I moved up from a C22 (a great boat) to the C320 (a magnificent boat) so I know CD.
>> Thank you for another great tip!
>> 
>> Bob Borelli
>> 1995 C320 no. 209 'Elusive'
>> 
>> 
>> ________________________________
>> From: C320-list <c320-list-bounces at lists.catalina320.com> on behalf of Dave Hupe <hoopdtwo at yahoo.com>
>> Sent: Wednesday, March 11, 2020 7:58 PM
>> To: c320-list at catalina320.com <c320-list at catalina320.com>
>> Subject: Re: [C320-list] Heat Exchanger Removal - Perkins M30
>> 
>> Bob-
>> I couldn't figure out how to break loose all 4 nuts on the exhaust elbow when I did my job, but since my emphasis was primarily on replacing my bad heat exchanger tank, it worked well for me to remove both the tank and elbow at the same time and then dismount the elbow from the tank in my garage.  Reinstalling my new tank with the exhaust elbow and wet exhaust hose already attached to it went pretty easily to slide it into place and seat the hose onto the muffler nipple without a lot of twisting/stress. However, if you DON"T have a reason to remove the tank itself, maybe look/try very hard to see if you can get the exhaust elbow off (maybe removing something else fairly easy) by itself as mentioned by Mark Cole.
>> As Mark mentioned a little heat on the wet exhaust hose and rubber end cap (and dish soap lube) during reassembly helps a lot. Also, consider alternatively using a more flexible replacement hump hose from Catalina Direct between the exhaust elbow and the muffler.  This hump hose  https://www.catalinadirect.com/index.cfm/product/2624/exhaust-hump-hose-2-id-x-6.cfm  will work, but you will also need the fiberglass splice available https://www.catalinadirect.com/shop-by-boat/catalina-350/engine/exhaust-system/exhaust-hose-fiberglass-splice-for-2quot-hose/ and a very short piece of regular 2 inch I.D. wet exhaust hose to fill the entire (although short overall) length between the muffler and exhaust elbow.
>> I am positive my exhaust elbow had never previously been replaced.  I was amazed how clean the inside of my exhaust elbow and the exhaust manifold outlet on the heat exchanger tank were (probably due to my freshwater situation). Note .... After comparing my new and old heat exchanger tank exhaust outlet areas (where the exhaust elbow mounts), I can see where people may misinterpret that there is scale buildup. I can provide comparison photos to illustrate if desired.
>> Dave Hupe
>> 1994 C320 (#32) "Mayan Sun"
>> Holland, MI
>> 
>> 
>> 
>> 
>> 
>> 
>