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Message |
FAST FRED (63.208.84.117)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Saturday, June 30, 2001 - 7:20 am: | |
IF the same coolant has been in your coach for a bunch of years its long past time to discard it.
OR if you just got your new baby home , before ripping the interior to shreads , order DA Book , and begin doing the normal maint that your coach requires.
The coolant {antifreez} in a coach is totally different ftom whats in an automobile.
The coolant in a DIESEL will have SCA { suplimentary cooling addatives} .
This stuff coats every part with a slime that is very important.
AS a diesel fires the cylinder walls ring like a bell, this causes liquid next to the cylinder wall to cavitate ,
air bubbles come out , caused by the sudden lowering of pressure.
The SCA holds the cavitation a tiny distance from the cylinder walls , stoping the destructive cavitation from eating the cylinder walls from the outside in.
This SCA wears out , OR can get too concentrated , and since its everywhere in the cooling system can easily cause overheating.
SO you should at least flush the system, cleaners can help ,too.
You should try flushing {cheap} first.
Drain entire system , refill with ONLY clean water, run engine ON ROAD!!! till warm , operate heaters , defrosters ect, go home and drain thru all {theres a bunch} of outlets.
DO this at least 3 times !
You will not loose much cylinder walls running with no SCA if you dont lug the engine, while flushing.
Disconnect a hose {have spare ready , hose welds itself to the engine in time} and feel inside of hose and block.
IF its relativly clean of slime , and water has been real clean on draining , its time for a mix of antifreze and distilled water.
50/50% is usual mix , but you can go as low as 35 % antifreez and still get benifits of SCA.
I only buy the coolant for a DD at the DD store.
Penny wise and pound foolish, doesnt help on a $10,000 engine.
They will also have a kit ($10.00 or so} for checking the state of the required SCA every 6 months .
Da Book has procedure for venting air from any heaters or defrosters and can show you all the many drain points.
IF you need a 2 part cleaner the DD guy has good stuff for about $50 that will do a couple of coaches.
Flush even more if you use the 2 part cleaner.
The flush procedure should be done at least every 3 years, as the antifreez also has many other chemicals in the additive package that gets used up.
FAST FRED |
S Cole (24.4.252.6)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, August 14, 2001 - 9:53 am: | |
sorry, I'm new at this. What is "Da Book"? Thanks, Sam |
Al (205.175.225.22)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, August 14, 2001 - 10:19 am: | |
Sam:
When you see a mention of "Da Book", that means the maintenance manual for your particular vehicle. |
s cole (24.4.252.6)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Saturday, August 18, 2001 - 4:11 pm: | |
Thanks! |
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