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Old 03-02-2019, 04:28 PM
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BMWX5CHI BMWX5CHI is offline
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Quote:
Originally Posted by ard View Post
Are you replacing with an OE cat? Doenst look like cutting involved. Get it up in the air and start taking parts off!



How long did it take that 'bad misfire' to kill your cat????
I was driving home and the horrible misfire started. I was around 5 minutes away from my house so I drove her home. The crankcase vent was making a high pitched whistle. I ended up replacing the valve cover, gaskets, breather hose, sparkplug seals, OFH gasket, oil cooler gasket, ignition coils, spark plugs, replaced the flange on a thermostat hose (# 11537541992) that started leaking after removal with a Reins aluminum flange. (# CHC0609) Also cleaned out the crankcase with seafoam spray and did a hot oil change w/ fresh Mann filter. Used all OEM parts except for the hose flange which is OE. I think I should be good with maintenance for a while
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2011 BMW X5 35d Deep Sea Blue Metallic w/ 3rd row
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(Gone But Not Forgotten) 2008 BMW X5 3.0si Alpine White III

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