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July 30, 2019 at 7:38 pm #76092
Leander LandrumParticipantVessel Name: 2001 Tiara 3500 Open
Engines: 2x Cummins 6BTA 370
Location: Tacoma WA
Country: US
This is same housing again. It’s the only surface with bad pitting. The rest have none or minimal.
July 30, 2019 at 7:34 pm #76090
Leander LandrumParticipantVessel Name: 2001 Tiara 3500 Open
Engines: 2x Cummins 6BTA 370
Location: Tacoma WA
Country: US
I still plan to put them back together per the instructional videos you guys have put up.
Post good pictures of your housings ā especially the flat machined top and bottom surfaces where the caps mount.
Is this too far gone? Replace or reassemble and and test it?
July 29, 2019 at 1:34 pm #76000
Leander LandrumParticipantVessel Name: 2001 Tiara 3500 Open
Engines: 2x Cummins 6BTA 370
Location: Tacoma WA
Country: US
3 ā āevenā 10 year old low hour coolant is not your issue if all was was good when installed..Something has changed if the coolant went bad. Again, the aftercoolers have nothing to do with the coolant.
Tony
Roger that. Radiator shop called and both exchangers tested fine. I will put her back together, monitor, and get the coolant tested if I see discoloration again.
July 29, 2019 at 6:07 am #75968
Leander LandrumParticipantVessel Name: 2001 Tiara 3500 Open
Engines: 2x Cummins 6BTA 370
Location: Tacoma WA
Country: US
Was it black-ish in color? Did you take a pic of it in a glass jar? How old was the coolant?I just bought her in February, talked to the prior owner and he thinks it hasn’t been changed since 2016, when he had the exchangers and aftercoolers serviced.
July 27, 2019 at 10:48 am #75930
Leander LandrumParticipantVessel Name: 2001 Tiara 3500 Open
Engines: 2x Cummins 6BTA 370
Location: Tacoma WA
Country: US
Iām confusedā What do the aftercooler cores have to do with the coolant?
As to your coolant looking ODD, not sure if that is what salt water does.. I personally have never seen that from salt water intrusion..
Did the shop pressure test the Heat-Exchangers?
Who is putting your aftercoolers back together? Plenty of radiator shops have no clue on these unique designs although they always say they do.
Tony
The aftercoolers have nothing to do with it, both problems are just surfacing (I bought the boat in February and decided to take those parts off and get them serviced as they were last serviced in 2016).
The shop pressure tested one heat exchanger, they haven’t gotten to the other one yet. I just find it worrisome that one engine had clear teal coolant and the other had coolant that you can’t see 1/2 an inch deep through it. If not saltwater, what could cause that? I actually bought the kit from you guys planning to just do this myself, but when the coolant came out funky I decided I should have a shop do it and check them. I still plan to put them back together per the instructional videos you guys have put up.
Steve – one of them came out ok, the other was stuck in there pretty good per the radiator shop.
July 27, 2019 at 8:30 am #75919
Leander LandrumParticipantVessel Name: 2001 Tiara 3500 Open
Engines: 2x Cummins 6BTA 370
Location: Tacoma WA
Country: US
Have you checked your prop, cutlass bearings and shaft/shaft seals?
July 27, 2019 at 8:12 am #75916
Leander LandrumParticipantVessel Name: 2001 Tiara 3500 Open
Engines: 2x Cummins 6BTA 370
Location: Tacoma WA
Country: US
Can anything other than the heat exchanger cause this to happen to coolant? I’m pretty sure this means there is salt water getting in to the coolant. The black part in my hand is just to show how opaque the fluid was. Other engine was very clear teal.
July 26, 2019 at 12:48 pm #75891
Leander LandrumParticipantVessel Name: 2001 Tiara 3500 Open
Engines: 2x Cummins 6BTA 370
Location: Tacoma WA
Country: US
Went to the radiator shop this morning, turns out it was the aftercooler cores. Ordered a new set.
July 17, 2019 at 7:23 pm #75476
Leander LandrumParticipantVessel Name: 2001 Tiara 3500 Open
Engines: 2x Cummins 6BTA 370
Location: Tacoma WA
Country: US
Hi all, first post. Apologies for reviving an old thread, but I’ve tried multiple searches and cannot find the Tony’s Tips article on fresh water flushing. It’s referenced in the “marine age” article but no link and I have had zero luck finding it.
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