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I come bearing great news! (DEM heat shield)

53K views 115 replies 44 participants last post by  Anthony@VMG  
#1 · (Edited)
My S80 heat shield finally came in. Much to my joy it is a complete bolt on part, the spacers for the shield are built into it! It took me literally 10 mins to put this on. Only thing to be aware of is hold your DEM in place while you are replacing the bolts. I didn't learn the hard way, but I expect it could fall right off.

And because SOME people :p won't read the entire thread, it is Part# 30783129

I christen it....The SS DEM Mod!

part:
Image


part installed (man it looks great!):

Image
 
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#18 ·
shame! :p



if Volvo runs metrics on what parts are ordered they are going to be WTF? with all of these plates getting ordered.

BTW, expect this to take a few weeks. Mine took almost a month to get here.
 
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#27 ·
Ummmmmmmmm shhhhhhh me either shhhhhhhh LOL now what to do!!!
 
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#5 · (Edited)
only the 4th Gen Haldex has the shield, which is what 2007+ S80s use, but it is completely compatible with our unit. It goes without saying that Haldex/Volvo was aware of the heat failures on DEMs and fixed this for S80s. If they were honorable they would issue a TSB and put this on for S60 owners. $30 is super cheap insurance.

EDIT: I forgot to mention the edge of the plate is super sharp and I sliced my thumb open like a watermelon on the edge. My punishment for getting in a hurry and not wearing my mechanic's gloves.
 
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#7 ·
you don't have a local dealer? I would think the shipping would kill you from myswedishparts....at least it did for me on other items.
 
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#9 ·
when you say costs half as much though, are you counting labor? I'm sure the actual cost of the Volvo part is in dollars but the labor has to be factored into it.

not deriding your part, just giving people an OEM outlet that is less likely to raise suspicion if it goes to the dealer.
 
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#10 ·
Good point, for folks still under warranty it might be hard to explain the DIY solution to your tech if they want to try and blame it for some DEM or haldex issues.

If someone is good with a drill and a set of tin snips you could easily make one in just a few minutes from my plan so parts and labor wise not to mention functional superiority I prefer mine but I'm a little biased, lol. :cool:
 
#28 ·
tin snips.... or... drimmle...? either way i got both hahaha
 
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#13 ·
Its a heat shield, its more about blocking radiation from the exhaust pipe than about airflow. My claim of superiority for my unit is that it blocks the heat from reaching additional critical areas like the pump and its wire harness and allows more airflow to the DEM than the factory one.

My current crazy vane deflector unit I'm now using is just an overkill unit to both shield and throw a lot of extra fresh airflow at both the DEM and haldex/diff unit. A little something extra for track days after reading a few threads about people overheating the haldex couplers at track events they attended.
 
#14 ·
my concern with yours is that more surface area is being heated across a wider area of the car, creating a larger space of heated area to be dissipated. What I like about the volvo design is they used some courrugation to increase the surface area but kept the over all dimensions the same.
 
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#22 ·
Is the DEM for an S80 the same part # for a DEM for the S60R? I want to make sure we aren't creating a problem which doesn't exist by this thing trapping heat rather than dissipating heat... S60R stock DEM failures are being caused by - what? Stock exhaust heat radiation or something aftermarket?
 
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#23 · (Edited)
There is another thread that discusses and illustrates the differences between Haldex generations. Long story short, on the surface of the 3rd gen DEM there is some dimpling to increase surface area for dissipation but not much more. 4th Gen Haldex introduced this heat shield that moves the heat conductive surface away from the housing. This is more representative of the kind of heat shielding I've seen for other electronics housings....you never want the housing of the electronics to be the dissipation surface.

whether or not it is stock or aftermarket exhausts killing DEMs, this design ensures that the DEM itself is not the first and last line of defense against heat. also, although my photo doesn't show it, there are no bending fins that restrict airflow coming from the front, the only bend is providing more protection from the exhaust.
 
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#31 ·
my morning commute logging the DEM temp sensor shows a 3 degree decrease from before so I'm sold.
Seriously?!?! LMAO, that's awesome. Wow, I really expected a more significant difference!! Well, got any track events planned in the near future? Mebbe then it'll be more of a difference? :confused:

-Steve
 
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#33 ·
keep in mind my morning commute is 15 minutes long, morning temps are cooler, and I'm just cruising, not flogging it. I don't have any track temp data to compare to but I agree there should be more of a difference come track time. I consider it signifigant that it registered such a difference without me flogging it.
 
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#37 ·
but since the DEM temp sensor is inside the housing I wanted to read it to make sure no trapped hot air was between the shield and the DEM, as someone had proposed.
 
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#36 ·
Almost as good as the JRL mod! :cool:
Seriously, good deal and good find
 
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