Hey guys and girls, so I've been doing a lot of upgrade and maintenance to my 93 4.0 The first part of February I put a new rear main seal ,oil pump, pick up tube, starter and oil pan gasket on her. Had a great oil pressure ran fine. She has 175,000 miles. I was getting a lot of noise from the timing chain and I noticed that it was loose when I did the oil pan. So me and my buddy did a timing chain job. Replace the chain the gears and the seal. ( the chain was loooose)we lined up timing marks and did everything properly I believe. When I test drove it around the block it smoked white for about half a block it kind of smelled chemically. The smoke stopped and it ran fine. I drove 12 miles to my house. About halfway home I started hearing a tick. Upon inspection it sounded like it was coming from the lifters. I pulled the oil fill Cap did not see a lot of oil being splashed around. It does not seem like it's getting enough oil to top end.it doesn't seem to be missing or running bad, just ticking louder than normal for my jeep. My question is what could be causing this. Thank you in advance Roger B.