Cold start knock - JKowners.com : Jeep Wrangler JK Forum
 
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post #1 of 7 Old 12-08-2011, 07:16 AM Thread Starter
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Cold start knock

Does anyone else experience cold start knock?
Yesterday it was about 26*F on the dash thermometer and I had cold start knock for about 5 seconds.

I am not looking for a lesson on what causes this so much as if anyone else experiences it.

2011 Rubicon
Teraflex leveling kit
Smittybilt XRC Flares
17x9 Mickey Thompson Classic II's
35x12.50-17 Goodyear MTR
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post #2 of 7 Old 12-08-2011, 09:53 AM
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Check out the oil filter drainback threads. I'd say that is the most likely cause..

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post #3 of 7 Old 12-08-2011, 11:36 AM Thread Starter
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Thanks, very likely that's what it is. It's only happened once since my oil change (last weekend with a wix filter). If it happens again I'll get a filter from the dealer.

2011 Rubicon
Teraflex leveling kit
Smittybilt XRC Flares
17x9 Mickey Thompson Classic II's
35x12.50-17 Goodyear MTR
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post #4 of 7 Old 12-09-2011, 11:12 AM
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I've had good luck with Carquest filters. Also I'm running 5w30 synthetic. I had start up knock using K&N oil filterand Fram regular orange but the Fram tough guard was OK. Ive been running the carquest filters for the last 3 oil changes and nothing.

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post #5 of 7 Old 12-10-2011, 08:17 AM
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Had it and switched to Fram Tough Gard and its all better now and we have had some cold mornings here lately and she doesn't knock no more

2011 Mango Tango Rubicon Unlimited
2.5 Teraflex coil lift with shock adapters, poison spyder brawler light bumper with skid, xrc 8 comp winch
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post #6 of 7 Old 12-10-2011, 09:39 AM
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Napa has a filter that i have had good luck with its the napa platinum filter from wix. i belive its a synthetic fiber for use with synthetic oils i also use penzoil ultra 5/20 with 8k intervals

seems to work for me i dont have a know neither does my wifes 2009

09' RUBICON UNLIMITED ( WIFES )2.5" lift, Bilstein shocks, 4.88 gears, 35" toyo m/t, 17" raceline wheels, fabtech front bumper, vision x tungsten lights, intake, modified borla exaust,

11' RUBICON UNLIMITED 4" TERAFLEX LCG, SPEED BUMPS,FRONT AND REAR DRIVLINES,37" GOODYEAR MT/R KEVLAR,17" ADDICTS,5.38's, MODIFIED XHD FRONT BUMPER, WARN CTI, WARN REAR BUMPER, INTAKE, MBRP OFFROAD EXAUST AND A WHOLE LOT MORE
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post #7 of 7 Old 12-10-2011, 10:00 AM
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I had a bit of knocking as well, but just recently switched from a fram tough gaurd to a Bosch filter and don't think I will run anything else. No More knocking

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