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Old 01-10-2011, 06:34 PM
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Heater core & silicate gel

I'm going to do a coolant flush soon (just ordered 4 jugs of Rotella Ultra ELC concentrate). I am wondering if the silicate gel that plugs the oil cooler also collects in the heater core. Or does the silicate just precipitate out where the most extreme heat is concentrated like in the oil cooler/EGR cooler area? My cab heat fluctuates a bit between uphill and downhill driving. I'm wondering if a good flush will improve this.

Regarding the flush procedure, would it be acceptible to do the complete flush in the shop? We have extreme cold here this time of year and I don't want to take a chance doing the driving phase of the flush when it is this cold (-18C). Could I run the Restore and Restore Plus phases at high idle with the t-stat out for an hour with the rad covered to keep the temps up? Thanks in advance for the advice.
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Old 01-10-2011, 06:57 PM
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I don't see why not ... You just need to get it up to temp and circulate it for about an hour. The only thing is when you remove the driver side block plug you're gonna have a mess all over the shop floor ... also don't use the entire gallon of Restore ... you'll be flushing out suds/bubbles for ever if you do ! Use approx 1/2 to 2/3 gallon only.
Just my $.02
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Old 01-10-2011, 07:07 PM
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Quote:
Originally Posted by BIGEBLU View Post
I don't see why not ... You just need to get it up to temp and circulate it for about an hour. The only thing is when you remove the driver side block plug you're gonna have a mess all over the shop floor ... also don't use the entire gallon of Restore ... you'll be flushing out suds/bubbles for ever if you do ! Use approx 1/2 to 2/3 gallon only.
Just my $.02
I was already planning to use just half a jug (as per what I've read elsewhere on the forum). How much liquid is left to drain from the block plug after the lower rad hose drain is finished?
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Old 01-10-2011, 07:32 PM
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Originally Posted by dnf12908 View Post
I was already planning to use just half a jug (as per what I've read elsewhere on the forum). How much liquid is left to drain from the block plug after the lower rad hose drain is finished?
Probably get a good 1/2 to 3/4 gallon out of the driver side block plug everytime you remove it. Use a 2-3 foot 3/8 drive extension to remove the plug so you don't get a coolant bath. Most of the slime/snot I got out of the system after the Restore flush came from the driver side block plug. Would have liked to remove the passenger side one too but it's a b*tch ... located behind the starter !
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