#1
IP: 184.148.120.67
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Smoke from exhaust - with video
I've noticed quite a bit of smoke coming from my exhaust.
Here is a video I've taken at about 1,600rpm: https://photos.app.goo.gl/m51VyKX9BXeN4jJT9 In the video, the engine is running at 180 degrees Engin is under load (in drive) tied up at the dock Oil pressure is 135 Outside temp is 22 C / 71 F I did a compression test: 110/110/115/115 psi (cold) Thanks in advance for any advice! |
#2
IP: 24.152.132.140
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Looks like steam to me, dissipates quickly. RWC or FWC? Atmospheric humidity level at the time of the video?
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Neil 1977 Catalina 30 San Pedro, California prior boats 1987 Westsail 32, 1970 Catalina 22 Had my hands in a few others |
#3
IP: 184.148.120.67
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Quote:
Humidity around 47% RWC in Lake Ontario |
#4
IP: 24.152.132.140
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180° seems high for a RWC engine. Do you have a thermostat? Bypass valve (assumes late model cooling system)? Just to be on the safe side I'd do a cooling system pressure test and an oil change. Check the color of the old oil for signs of water incursion.
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Neil 1977 Catalina 30 San Pedro, California prior boats 1987 Westsail 32, 1970 Catalina 22 Had my hands in a few others |
#5
IP: 184.148.120.67
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Quote:
I did an oil change 10 days back. I can pull some out tomorrow and have a quick look at it. The engine does seem to be running hotter than normal. Water is about 22 C / 72 F. I'll have to read up on how to do a cooling system pressure test Last edited by Graham; 08-18-2020 at 10:08 PM. |
#6
IP: 24.152.132.140
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Try closing the bypass valve, 50% to start and watch the temp (hopefully) go down. What thermostat do you have, original Holley 3 spring, the substitute for the Holley with spacer when it was discontinued or a new one from MMI?
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Neil 1977 Catalina 30 San Pedro, California prior boats 1987 Westsail 32, 1970 Catalina 22 Had my hands in a few others |
#7
IP: 184.148.120.67
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Quote:
Will do on the bypass front. I have the replacement upgrade thermostat kit ( with spacer) from MMI. Replaced spring 2017. Last edited by Graham; 08-18-2020 at 10:35 PM. |
#8
IP: 24.152.132.140
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If it's this one, I learned the condition of the port in the center of the underside of the thermostat housing is critical to the proper function of the thermostat. You might want to take a good look at it.
Here is a post that discusses it in detail. Check out the temperature tables at the bottom. http://www.moyermarineforum.com/foru...81&postcount=6 edit: Quote:
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Neil 1977 Catalina 30 San Pedro, California prior boats 1987 Westsail 32, 1970 Catalina 22 Had my hands in a few others Last edited by ndutton; 08-18-2020 at 10:49 PM. Reason: typo |
The Following User Says Thank You to ndutton For This Useful Post: | ||
Graham (08-18-2020) |
#9
IP: 184.148.120.67
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Thanks Neil - I'll close the bypass 50% and see how we make out.
I'll report back after I get to the boat tomorrow. Thanks!! |
#10
IP: 24.152.132.140
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Stay tuned. Others may have different ideas.
__________________
Neil 1977 Catalina 30 San Pedro, California prior boats 1987 Westsail 32, 1970 Catalina 22 Had my hands in a few others |
The Following User Says Thank You to ndutton For This Useful Post: | ||
Graham (08-18-2020) |
#11
IP: 184.148.120.67
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I'll also do an acid flush tomorrow
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#12
IP: 24.152.132.140
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Quote:
__________________
Neil 1977 Catalina 30 San Pedro, California prior boats 1987 Westsail 32, 1970 Catalina 22 Had my hands in a few others |
The Following User Says Thank You to ndutton For This Useful Post: | ||
Graham (08-18-2020) |
#13
IP: 184.148.120.67
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Reading up on how to do a cooling system pressure test. Any idea what the barb fittings sie would be from this pic?
https://photos.app.goo.gl/FF32Ag3jVaNqM7DT8 |
#14
IP: 24.152.132.140
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Has to fit your cooling system hoses because that's where they attach. Mine are 5/8" throughout but there is no guaranty yours are the same.
__________________
Neil 1977 Catalina 30 San Pedro, California prior boats 1987 Westsail 32, 1970 Catalina 22 Had my hands in a few others |
The Following User Says Thank You to ndutton For This Useful Post: | ||
Graham (08-18-2020) |
#15
IP: 47.142.134.119
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Quote:
Graham: What oil and what viscosity are you using? ex TRUE GRIT |
#16
IP: 174.94.18.252
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Quote:
Sorry that was I typo. It's corrected now. Oil pressure is 35 & I use Motul 4T 3000 10W40 (M42) Motorcycle oil |
#17
IP: 71.38.112.42
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A little late to the party...
HERE is a thread that discusses both the Acid Flush and the Pressure Flush (with Pics too)
__________________
-Jerry 'Lone Ranger' 1978 RANGER 30 |
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Graham (08-19-2020) |
#18
IP: 174.94.18.252
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Quote:
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#19
IP: 209.162.246.149
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Today's progress:
I did the acid flush. I pressure tested the RWC system at 20psi for 30 min and droped to 16psi. Is that that is a concern? Maybe I'll do this test and see what happens over an hour. Then I pilled off the impeller, and it was shredded: https://photos.app.goo.gl/4TA5NsVCWKzMML1K8 I had replaced it with a new on at the beginning of this season with one that I found on my boat that was new in the package. It could have been 15 years old but looked like new and was sealed, so I figured it would be good to go. I guess not! So I put the old one back in as there was really nothing wrong with it and will order up a new one. I found all but one of the fins. Hopefully, that one found it's way out the exhaust. She's cooling like a champ now Thanks for the help everyone!!! Last edited by Graham; 08-19-2020 at 03:47 PM. |
The Following User Says Thank You to Graham For This Useful Post: | ||
roadnsky (08-19-2020) |
#20
IP: 69.127.24.15
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So its steam !!!
I have been having this issue this season ...
Graham your Video is an exact representation of my issue .. I thought I was burning oil, but apparently its steam . I also like your "tailpipe extension ". I may add one myself . Time for an acid flush for me . I will even open the side plate this winter and clean that out , it has not been done in the 5 years I have owned the boat and I have done one acid flush in that same time period .
__________________
S/V Gosling Westport CT . “Believe me, my young friend, there is nothing - absolutely nothing - half so much worth doing- as simply messing about in boats.” ― Kenneth Grahame |
#21
IP: 24.53.89.131
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Good Old Boat
The water flow out of Graham's exhaust looked weak to me - good hint there was a flow problem. Check your water pump impeller poor flow = elevated temps = steam Peter |
The Following 2 Users Say Thank You to Peter For This Useful Post: | ||
goodoldboat (08-24-2020), Graham (08-21-2020) |
#22
IP: 69.159.37.152
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[QUOTE=goodoldboat;122563]I have been having this issue this season ...
Graham your Video is an exact representation of my issue .. Thanks, that short extension keeps my transom looking spiffy |
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