Dry Start, how can you tell?
01-19-2011, 10:37 AM
#31
JK Super Freak
A good way to tell if your dry starting other then the noise you get is to turn the key to accessory wait for the oil light on the dash to go off then start the jeep, if the oil light comes back on your dry starting. I tried a bosh filter and got dry starts every day so I switched back to a mopar and have had no dry starts so far even if it's parked on a incline. Hope that helps
Cheers
01-19-2011, 10:39 AM
#32
JK Super Freak
01-19-2011, 10:41 AM
#33
JK Super Freak
Same here. Oil drains from the heads naturally to the pan and does not go through the filter to get there. I mean, when you put in your oil through the oil hole on top of the head cover, it doesn't go through the filter....it goes through the drain holes which eventually go to the pan. The filter has nothing to do with this.
:rotfl mao2:
01-19-2011, 11:25 AM
#34
JK Junkie
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Same here. Oil drains from the heads naturally to the pan and does not go through the filter to get there. I mean, when you put in your oil through the oil hole on top of the head cover, it doesn't go through the filter....it goes through the drain holes which eventually go to the pan. The filter has nothing to do with this.
The valvetrain is the last thing to get pressurized oil to it. The (leaked down) hydraulic lifters make the most noise on a cold start. If the oil filter doesn't have a properly working anti-drainback valve, the filter will have drained somewhat. So, when the engine starts, the oil pump has to re-fill the oil filter before that oil can make its way through the bottom end bearings and finally up into the valvetrain to refill those lifters. Meanwhile, they have too much lash and are rattling around. Regardless of which filter is used, if the lifters have leaked down over time, the engine will rattle when it's started. A filter with a good anti-drainback valve just makes the rattles go away quicker.
Hope that helps...somebody.
01-20-2011, 05:27 AM
#35
JK Freak
I plugged my Jeep in last night and this morning when I started it, no knocking sounds. I wonder if it's possible that when the temperatures get really cold outside, the oil gets thicker...gels up a bit, and then that slows it from getting to where it needs to go right away. 
01-20-2011, 05:45 AM
#36
JK Junkie
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I plugged my Jeep in last night and this morning when I started it, no knocking sounds. I wonder if it's possible that when the temperatures get really cold outside, the oil gets thicker...gels up a bit, and then that slows it from getting to where it needs to go right away.
01-20-2011, 01:36 PM
#37
JK Freak
01-23-2011, 02:49 PM
#39
JK Newbie
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I was having the same noise on a cold start. I changed to the Fram tough guard today and hopes it fixes the issue. Do I need to replace the anti drain back thingee too or should this fix it?