Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 20-04-2018, 11:00   #1
Registered User

Join Date: Oct 2013
Posts: 20
Exhaust Temperature Alarm

I'm about to install an exhaust temperature alarm on my Carver with twin Caterpillar 3208's. There are two popular products that I'm considering from Borel Mfg. and Aqualarm. Both products use a band that clamps around the exhaust after the mixer. The Borel alarm trips at 165F and the Aqualarm trips at 200F, both of these cannot be correct for the application. If 165F is the correct temp for this application, then Aqualarms product at 200F will not trip early enough and engine damage may already be taking place. If the 200F setting on the Aqualarm product is the proper setting, the Borel 165F product will set off early false alarms. Can anyone shed some light on this?
__________________

mikekomm is offline   Reply With Quote
Old 20-04-2018, 13:08   #2
֍֎֍֎֍֎֍֎֍֎

Cruisers Forum Supporter

Join Date: Apr 2006
Posts: 13,986
Re: Exhaust Temperature Alarm

Mike-
Probably best to ask Caterpillar.
IIRC exhaust gas is in the 700F range, and cooling water">engine cooling water could be 140F-170F depending on fresh or salt water choice. So the 165 might be adequate, while the 200 might also be normal considering more exhaust gas in the mix means temps higher than just the water would be.
You could also take an infrared non-contact thermometer to read what your "normal" temps are in that location, now. Or a simple oven temperature/clock/timer, the kind that has a stainless probe, which could be strapped into the same location and read from time to time to see how it normally is.
The question is not which is "right" but rather, what is normal in that spot, in your installation.
__________________

hellosailor is offline   Reply With Quote
Old 20-04-2018, 22:14   #3
Registered User

Join Date: Oct 2009
Location: australia
Posts: 514
Re: Exhaust Temperature Alarm

By using the 165f sensor you can always insulate the mounting area in order to reduce sensitivity.
shakey doug is offline   Reply With Quote
Old 20-04-2018, 23:03   #4
Registered User
 
Snowpetrel's Avatar

Join Date: Jul 2012
Location: Hobart
Boat: Alloy Peterson 40
Posts: 3,377
Re: Exhaust Temperature Alarm

You could go for a TM4 engine watchdog. They are perfect for this application, with a fully adjustable alarm point, and another sensor that can go on the block to warn of early coolant loss or overheating.

I've got one on my engine and so have my folks. Its probably saved their engine, and possibly the boat a few times when they had an intermittent thermostat issue.

A good bit of kit, and I've always had a very prompt response when I ordered from them online.

I plan to order one for my car, much cheaper than a cracked head.

http://enginewatchdog.com/tm4.html
__________________
My Ramblings
Snowpetrel is offline   Reply With Quote
Old 21-04-2018, 00:05   #5
Registered User
 
Snowpetrel's Avatar

Join Date: Jul 2012
Location: Hobart
Boat: Alloy Peterson 40
Posts: 3,377
Re: Exhaust Temperature Alarm

Or just hook up one TM4 lead to each engine exhaust mixer, and you can monitor each engine with one unit.

The TM4 isn't a pyrometer, it won't give direct Exhaust Gas temperatures, but it will give very early warning of any problem on the salt water side before exhaust damage or engine temos start to go up to much.
__________________
My Ramblings
Snowpetrel is offline   Reply With Quote
Reply

Tags
alarm, exhaust

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Exhaust hose temperature specifications Alii Engines and Propulsion Systems 10 31-10-2014 23:11
Temperature Alarm Switch PSR Engines and Propulsion Systems 10 09-09-2014 19:57
Diesel Exhaust Gas Temperature-Power Delivered Arion Engines and Propulsion Systems 7 06-10-2013 18:27
EGT (Exhaust Gas Temperature) check with auberins heintje23 Engines and Propulsion Systems 5 09-01-2013 15:40
False temperature alarm on Volvo MD22 Wavelength Engines and Propulsion Systems 7 07-06-2012 07:30



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 07:28.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2018, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.