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Coolant - Simple One...

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Old Aug 8, 2009 | 01:42 AM
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Coolant - Simple One...

Hi All,

Really simple question... new thermostat going in next week, so figured I'd start fresh with the coolant and SCA levels etc - given the truck's uncommon here in the UK and the haynes manuals are on their way still from the US - could someone give me the correct amount of coolant for the system? Obviously I could just keep filling - but want to get the DCA4 math worked out.
(engines a 6.9L)

Cheers - Ricky
 
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Old Aug 8, 2009 | 04:19 AM
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WEST AUSSIE 94 250
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My manual says 27 liters for 7.3 and they have the same block so should be fairly close. I started a thread titled 'sca levels' the other day on this forum and got some good advice and also posted some rough figures enough to get started. I am doing mine in the morning so will let you know of any hurdles. My biggest problem was sourcing the coolant and dca 4 so if you have that covered your half way there. As a side note I have heard the haynes manuals are a bit limited, I have the oem manuals so if you need any info just post here and I will keep an eye out for you.
 
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Old Aug 8, 2009 | 07:57 AM
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I have been told they hold just under 8 gallons. When I replaced my water pump and radiator, I ended up putting 7 gallons back in.
 
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Old Aug 8, 2009 | 11:34 AM
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If everything is completely drained, 8 gallons should give you enough to fill the engine and coolant recovery tank.
 
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Old Aug 8, 2009 | 12:53 PM
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Originally Posted by RickyFutura
Hi All,

Really simple question... new thermostat going in next week,
Cheers - Ricky
Just checking to make sure you're installing the proper Motorcraft part (RT-1049) and not an aftermarket unit.
 
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Old Aug 8, 2009 | 04:01 PM
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No need for math on the DCA just dump in the whole bottle. No such thing as too much.
 
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Old Aug 8, 2009 | 04:44 PM
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Thanks for the info all... 8 Gallons it is then.

West Aussie - Yup I saw that thread a day or so ago - good stuff, made notes

GenLightening - Indeed Motorcraft it is... been getting stuff shipped from RockAuto, GP's (Motorcraft) ordered on last Weds - arrived Fri and that's not even using the quickest ship option... not bad for a 4000 mile trip.

While I've got your collective knowledge here, I was checking the rad out today and the lower hose felt like it had some kind of coil within it... that sound familiar?

Cheers - R
 
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Old Aug 8, 2009 | 07:14 PM
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The lower radiator hose can have a big, loose coil spring in it to keep it from sucking together.
 
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Old Aug 9, 2009 | 12:40 AM
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That's exactly what it feels like - knowledge is power... Thanks.
 
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Old Aug 9, 2009 | 05:05 AM
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Ricky, Did mine today and I found I didnt get a complete drain just removing the bottom hose. There is a plug on each side of the block near the back and down low, about 15mm head . If you remove one of these you get much more of the old coolant out.
 
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Old Aug 9, 2009 | 10:57 AM
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Originally Posted by luthrobediesel
No such thing as too much.
From the back of the Fleetguard test strip package: If levels are over 3.0 units per gal. do not add additional sca's until levels fall below 3.0 units per gal. Thats why they make the test strips.
 
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Old Aug 9, 2009 | 01:06 PM
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Originally Posted by fuzzy1626
From the back of the Fleetguard test strip package: If levels are over 3.0 units per gal. do not add additional sca's until levels fall below 3.0 units per gal. Thats why they make the test strips.
Doesnt hurt it to have too much. Ive never seen a cylinder liner get eat up for having too much DCA in it. Dump in the whole bottle for good measure. No need for test strips.
 
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Old Aug 9, 2009 | 09:46 PM
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To much can be just as bad as not enough.

To much tends to drop out of the coolant and make a nice sludge that can stop up the radiator, oil cooler and heater core.

If you have it mixed with an antifreeze with silicates in it, the problem is even worse.
 
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Old Aug 9, 2009 | 10:41 PM
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Originally Posted by Dave Sponaugle
To much can be just as bad as not enough.

To much tends to drop out of the coolant and make a nice sludge that can stop up the radiator, oil cooler and heater core.

If you have it mixed with an antifreeze with silicates in it, the problem is even worse.
Ok, Dave, I didnt know that, where I work, we service a lot of trucks and dont have the time to fool with the strips, so we just dump in a punt size bottle with each coolant fill. I will try to use the strips more often.
 
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Old Aug 10, 2009 | 02:37 AM
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Too much DCA will cause silicate drop out and will actually bring the PH down in the process. This is why testing either with strips or a drop reagent solution is mandatory.
 
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