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BoulderX45
03-18-2011, 11:32 AM
I need to add some coolant to my over flow tank. I think I read that I should not use "normal" coolant. What should I use?

Thanks,

rgardjr1
03-18-2011, 11:56 AM
I need to add some coolant to my over flow tank. I think I read that I should not use "normal" coolant. What should I use?

Thanks,

My 5.7L Crusader uses Dex-Cool. I think it's a GM developed antifreeze.

NatesGr8
03-18-2011, 12:07 PM
I think the most important thing is to use the same color. I'm guessing yours is green, so when adding make sure what your adding is green. My engine says use sierra brand antifreeze only, which is green too.

rgardjr1
03-18-2011, 12:20 PM
I think the most important thing is to use the same color. I'm guessing yours is green, so when adding make sure what your adding is green. My engine says use sierra brand antifreeze only, which is green too.

Mine is red/orange in color. If it's a Crusader engine the manuals can be downloaded from the website.

NatesGr8
03-18-2011, 12:44 PM
I need to add some coolant to my over flow tank. I think I read that I should not use "normal" coolant. What should I use?

Thanks,
after a little searching, i would venture a guess that normal coolant is ethylene glycol based and not normal is propylene glycol based antifreeze (less toxic). Most automotive antifreeze that is found in stores are ethylene glycol, so you'll have to find something propylene glycol based.

rgardjr1
03-18-2011, 01:13 PM
Here is a link for the 2006 Crusader manual. If that's what you have this should help:
http://www.crusaderengines.com/manuals/L510001-06.pdf
Page 48 talks about Dex Cool. Same anti-freeze I put in my 2003 GMC Sierra.

ksdaoski
03-18-2011, 01:20 PM
LQ9 is not the Crusader. Not saying they may not use the same antifreeze, but def not the same engine and would have a whole different set of manuals.

ksdaoski
03-18-2011, 01:23 PM
ftp://ftp2.indmar.us/Winterization/LQ9%20WINTERIZE.pdf

Indmar Products
5400 Old Millington Rd.
Millington, TN 38053
Phone 901-353-9930
Fax 901-359-4292
To: MasterCraft Employees, Dealers and Boat Owners
From: Indmar Service
Subject: LQ9 Draining Instructions
Besides the normal winterization steps such as changing the oil, removing/inspecting the raw
water pump impeller etc., the LQ9 engine requires some special “draining” procedures to
remove the water from the raw water side of the cooling system. These instructions provide
that supplemental information.
NOTE: Use only “Sierra” brand, non-toxic anti freeze to top off the freshwater (anti-freeze)
side of the cooling system. Engines leave Indmar with a 50:50 mix of anti-freeze and water. If
this ratio does not provide adequate protection from freezing in your area, adjust the
concentration accordingly.

rgardjr1
03-18-2011, 01:37 PM
Looks like Sierra is the anti-freeze of choice which is different from what I was recommending. Can anyone remember back in 2006 if the Crusaders were only put into the Saltwater Series boats? Looks like you could get a closed cooled LQ9 in a non SS boat or a 6.0L Crusader in a SS boat. I know that Mastercraft only put the Crusaders in their SS boats for a couple of years.

ksdaoski
03-18-2011, 01:52 PM
The LQ9 only came as a closed cooling system, but I don't think it was being offered as a selling point, such as "good for salty or brackish water conditions". Just a function of the engine setup. That being said, I don't know why it was only a closed system engine.

From research I've done previously, the Crusader was the only choice for SS MC's in the mid 2000's. And then the MCX was converted to a closed system for SS use.

rgardjr1
03-18-2011, 01:57 PM
The LQ9 only came as a closed cooling system

Thanks for the education. I didn't realize the LQ9 was only offered with closed cooling.

ksdaoski
03-18-2011, 02:00 PM
Watch, someone will probably come out and correct me!

But I'm 99.9% sure thats the case, and the Indmar winterizing tip sheet seems to back this up.

2RLAKE
03-18-2011, 08:04 PM
yes that is true