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Tips for Changing Coolant Line from Compressor to
I think I have finally met my match… Have been working on a coolant flush for wayyyyyyy toooooo long as keep finding hoses I “think” I should replace as preventative maintenance.
2006 year model H3 chassis currently has 104,000 miles and in addition to other hoses, I now would like to change the coolant hoses that go from the water pump to the BA921 engine driven air compressor and from the compressor to the engine block.
The “return” line to the engine is EXTREMELY tight and hoping someone has changed it and can offer tool and procedure tips. I am hoping I do not have to remove the air compressor, especially since the fuel pump is mounted on the rear of it and seems that would be an engine priming nightmare!
(my camera makes it look like lots of working space, but no)
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10 Replies
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Use a crowfoot wrench on an extension and rachet.
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Thank you Mikee and Al – will give it a try 🙂
Jon – are yours original or have they been changed?
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Mine are still original.2005 chassis, 174,000 miles.
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Thank you, Jon. FYI, my local Freightliner dealer has not been able to get an exact match for either hose. He is able to pull up a part number by engine serial number, and they match the image on the computer screen, yet when they come in, they are not even a close match, despite the “correct” part number tag affixed to each.
Think I will leave it alone now as heading out in a couple of weeks, and maybe when we return home in a few months, will have some made. BUT I am going to buy both 7/8″ and 22mm crow foot wrenches as that is what it would take, in addition to long arms, to remove those two factory DD hoses.
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The crows foot will loosen it, I’ve found in tight spots wrenches with different angles help. I have two sets of AN wrenches, one is straight and 30 degree, the other is 30 and 60 degree. You can turn the wrench 180 and get pretty much any needed angle to keep the nut turning.
The angled wrenches -may- help:).
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For what it’s worth, I have just pulled the engine on my 1989 XL40 Country Coach and find that the original coolant hoses all look great. That is a tight spot for sure. Not sure I would bother with them. The only hoses that I am definitely set on replacing are fuel hoses…and they look good too!
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Good to hear – THANK YOU, Rick!
Please let us know how the fuel line changes go.
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Rick… are there fuel hoses available designed to offset the effects of bio-diesel? Please let us know what you use. THANK YOU!
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Jeff, will do. I was thinking about calling Pirtek and having them come to the house and make all my hoses up all at once. Not sure yet how pricey that might be. Parker store certainly wasn’t cheap on my air lines.
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