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Old 01-15-2011, 04:01 PM   #1
Scooby Newbie
Member#: 250445
Join Date: Jun 2010
Default Adding Primitive Racing skid plate question

So, my son got his primitive racing skid plate for his 2008 Impreza and we just spent a few hours trying to get it on while preserving the two side skirts...unsuccessfully.

The skid plate does not cover the entire bottom over to the sides...and although the instructions say that the side skirts might be cut, there was just no real way to do that and have them firmly mounted...so we gave up.

I searched for an OE underskirt, as his did not have one when we got it recently...was told it didn't by a couple of folks, but never thought to confirm that here.

Finally, the coolant was a little low...I know there's a Subaru Coolant and am sure that's preferred, but since I don't have it right now, am wondering if anyone knows if bmw coolant is compatible...I won't mix coolants of different types as I know that can lead to problems, but as his appears to be blue I'm curious if anyone knows if it's the same or compatible.

Thanks a lot, folks...really appreciate any info/thoughts you might have.
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Old 01-15-2011, 04:06 PM   #2
Scooby Specialist
Member#: 174710
Join Date: Mar 2008
Chapter/Region: NWIC
Location: Seattle
1992 Legacy Turbo
Dream Machine


Shoot Paul Eklund (or anyone else at his shop) an email and ask them. There just down in the Portland area and are all great people and I'm sure will be more than willing to give you a few tips on installing the skid plate.

As far as coolant goes, if your ever unsure go down to your local auto parts store and grab some Prestone (full, 50/50 is a waste of money). It will mix with whatever you have in there. I want to say with 90% certainty that its just regular green coolant, but I work on older Impreza's so I could be wrong.

Hope this helps!
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Old 01-15-2011, 04:25 PM   #3
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Member#: 151079
Join Date: Jun 2007
Chapter/Region: MAIC
Location: College Park, MD
2005 2.5RS RBP
too many friction losses


You'd be fine just topping off with distilled water.
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Old 01-15-2011, 04:34 PM   #4
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Member#: 250445
Join Date: Jun 2010

Thanks, guys.

I get fussy about coolant, coz on bimmers, cooling system is particularly sensitive and part of our 'fluids religion' on my bmw forum is 'don't mix.'

I know from 'my' forum that the three major types of coolant don't play nicely together...so think I'll just use distilled now (I just need a couple of cups) and come Spring, will do a flush, as it is looking dirty...maybe why I thought the green was blue!

Edit: just got off from a nice call with Paul Eklund and my ocd concerns are now allayed! Still surprises me the car didn't come with a center splash shield to prevent stones getting kicked up between belts and pulleys...which was my main concern...and also, frankly, based on our talk, I get the sense that the side skirts really didn't do a heck of a lot preventing stuff coming up into engine bay anyway, so we've tossed those sides aside for now...might get in there and give it another go sometime.

Thanks again!


Last edited by ocddad; 01-15-2011 at 04:52 PM.
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Old 01-16-2011, 04:04 AM   #5
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Member#: 102984
Join Date: Dec 2005
Chapter/Region: MWSOC
Location: Northbrook, IL
2005 2.5RS 4EAT
Platinum Silver


Subarus need coolants without silicates or phosphates. There's some talk around that this leads to headgasket issues, especially without the subaru coolant conditioner.

Peak Global will do the job. It's pretty much just water and propylene glycol.
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Old 01-16-2011, 11:52 PM   #6
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Member#: 71092
Join Date: Sep 2004
Chapter/Region: MWSOC
Location: Delaware County, Ohio
2005 2.5RS Wagon
Regal Blue Pearl


It's interesting that something is interfering with the new cars. On the older chassis, the skidplate didn't interfere with anything else.
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Old 01-17-2011, 12:07 PM   #7
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Member#: 1748
Join Date: Jun 2000
Chapter/Region: NESIC
Location: Boston, MA, USA
'09 Outback Sport
OBP over DGM


I think that the "side skirts" being mentioned are part of the wheel well liner improvements made from the 2008-2009 model years to control road noise better. I think of them more as spray-shields or something like that. Essentially they are a plastic piece that runs undeneath the front of the car, along the sides, from in front of the tire to the bumper. It attaches to the bumper in front and along the sides. I don't think previous subies had these, so I doubt that it's ever been an issue before.

I'm not sure why they did the sides and not the center, especially since the WRX gets a center shield. Something to beware of, I edged up too close to a curb and sheared off the plastic body-clip that hols the shiled on in the front. Last snow storm in some deepper snow that sllowed the panel to hang low enough to become a snow scoop. It loaded up with snow and raod-sluch, snapped other clip on the side and promptly bent backwards towards the wheel and began to drag on the ground. Luckily it never got far enough back to get undert he wheel. That would have been exciting, as I think these pieces are actually an extention (same piece) of the wheel well liners themselves. It's now secured with zip ties until the spring. Getting under the car in the snow and slush sucks.
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