Flush before or after? That is the question. - Ford Powerstroke Diesel Forum
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post #1 of 7 Old 11-13-2012, 05:51 AM Thread Starter
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Flush before or after? That is the question.

I am replacing my oil cooler this weekend, and was wondering do i flush before i replace the new one....with the old one in place yet? Or do I flush after, risking what I think would be contaminating the new one?

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post #2 of 7 Old 11-13-2012, 06:10 AM
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Before. Your thinking is correct. Flush after and risk turning loose a bunch of crap into your brand new cooler.
Preferably put a coolant filter on for a few thousand miles beforehand.

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post #3 of 7 Old 11-13-2012, 06:10 AM
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Before. Its better to run a coolant filter for a few thousand miles before the flush though...if possible. If you flush after you replace it tou would probably clog the new one.

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post #4 of 7 Old 11-13-2012, 06:18 AM
War is the answer!


 
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Quote:
Originally Posted by JIM_C View Post
Before. Your thinking is correct. Flush after and risk turning loose a bunch of crap into your brand new cooler.
Preferably put a coolant filter on for a few thousand miles beforehand.
Copy cat

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White 04 F350 Lariat SRW/CC/LB/FX4 227,XXX+
Studs/BPD58V FICM Atlas40/BPD oil cooler/waterpump/7.3 fan
Edge insight CTS EGT/Turbo timer/FP SCT with ? Tune
Powermax w/KC billet wheel Warren 175/30%
5-8" MBRP Off Road Turbo Back/harpoon
2" Leveling/33' BFGATKO
ELC/PMM Coolant filter
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Semper Fidelis (Always Faithful) is the motto of the Corps. That Marines have lived up to this motto is proved by the fact that there has never been a mutiny among U.S. Marines.
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post #5 of 7 Old 11-13-2012, 06:48 AM Thread Starter
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Thanks for the help guys...I appreciate it a bunch.

2005 Black F250 Lariat CC/SB FX4
Hypermax Mach 7 Gen II
Hypermax EGR Delete
OEM Oil Cooler Upgrade
CAT EC-1 ELC Coolant
Garrett Powermax Stage 1 Turbo
ARP Studs, Stock Head Gaskets
Sinister Diesel Oil and Coolant Bypass Filtration
ATD Rebuilt Transmission
Blue Spring Upgrade
Amsoil w/ Billet Fuel and Oil Filter Caps
River City Diesel 155cc Injectors and HPOP
SCT X4 Tuner
6.0 Powerstroke Diesel

Thank You!

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post #6 of 7 Old 11-13-2012, 07:23 AM
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Quote:
Originally Posted by WarChild View Post
Copy cat

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No, YUR a copy cat!

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post #7 of 7 Old 11-13-2012, 07:33 AM
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Well I was thinking what both of you said you You're ALL copycats

OP, Yes I would do it before swapping coolers. Don't take the chance of ruining your new one. a couple thousand miles is good to have but not everyone has that option. (if the cooler is plugging bad and might rupture EGR cooler)
Atleast drive it a couple days-a week to get some coolant flow through the engine

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