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I have a 2001 wrangler 4.0L inline 6. Last summer I figured out I had issues with my oil pump. So I replaced it. I also had a problem with the oil pressure dropping to zero at idle. I replaced the main bearings and that fixed that issue. So I bought this jeep used almost 3 years ago. I...

Hi all, So I have a 2001 Sport 4.0L engine with 124K miles. I bought this used last year. So initially the problem I saw was when I started the car the "check gauges" light would come on, the oil pressure read 0, then after a few seconds, the pressure would rise to 20 and the light would go...