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Old 12-10-2012, 11:03 AM   #1
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Melted DIC

Just installed a brand new DIC and when I pulled the old one off the 2 middle coil sleeves (?) had melted, not completely but heavily distorted mostly around the bottom where it covers the spark plugs. Any idea what could have caused this? Obviously don't want to melt my new one, wasn't cheap.
I'm off to work now but I'll try and get a pic up later when I get home.
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Old 12-10-2012, 01:32 PM   #2
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engine overheating!
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Old 12-10-2012, 09:30 PM   #3
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Not sure if that was a question or a comment

I've never seen the temp gauge go over halfway since I've owned the car, not to say that hasn't happened or the gauge is perfect. When I first got the car, about a year and a half ago, the douche who had it before me had some form of bosch plugs in it, not sure what type but they were the first thing I replaced as it was running like a bitch. When I changed them I didn't notice the melty bits but I'm not super observant so they may have been fingered then. Anyway here's a couple of pics, any other ideas would be appreciated.





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Old 12-11-2012, 05:40 AM   #4
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engine overheating
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Old 12-11-2012, 10:45 AM   #5
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Bugger!

I wish I could remember if they looked dodgy last time I had it off!
Where is the engine temp sensor located? Closer to the inlet or outlet side of the radiator? Like I said I've never seen it go over half since I've had it, maybe the sensor is screwed? It moves but maybe it's giving a false reading, how can I check that?

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Old 12-29-2012, 07:23 AM   #6
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Dude, if your engine was overheating enough to melt silicone rubber, and only on the two middle cylinders, then you'd have more serious issues and you'd definitely know it was overheating. Probably the PO accidently let the DIC fall on the hot exhaust manifold or something like that.
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Old 12-29-2012, 10:41 AM   #7
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There is a temperature sender for the gauge and a temperature sensor for the ECU. One is buried back by the intake manifold, the other is on the side of the head by the thermostat housing.
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Old 12-29-2012, 05:50 PM   #8
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I pull lots of DIC's off cars to change plugs for routine maint at work and see this VERY often on Red DIC's and occasionally on blacks. I don't think it's anything to worry about.

Maybe the oil that is in them has dried up and they melt more easily?
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Old 01-04-2013, 03:28 AM   #9
 
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Men... just check and double check the spark plug gap!
Its 1.0 mm
Many places put them as it comes right out of the box... and sometimes they fall on the floor... causing those issues

IF you suspect something more... maybe a check on the injectors... clean them...
Or pull the head off to see how the rest is doing....
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Old 01-04-2013, 02:09 PM   #10
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Thanks for the replies fellas, I'll keep a close eye on things and see how it holds up.
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Old 01-07-2013, 10:29 AM   #11
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You should always make sure there is enough dielectric grease on the rubber seal ends of the coils to help seal them as they slip over the spark plugs. This helps keep them from sticking to the hot plugs.
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Old 01-07-2013, 11:06 AM   #12
 
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Yep...a nice schmear of dielectric on each of the DIC teats works wonders.

also: Taylor Swift passed along this tip:

Never, ever, ever...store your DIC with the flat side down.
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