typer2k1
New Member
- Joined
- June 27, 2012
- Messages
- 6
- Reaction score
- 1
- Year, Model & Trim Level
- 2002 Explorer 4.0 V6 4X4
Hey guys,
I've been on this site looking around and getting ideas on how to fix my father in law's Explorer. He initially had an issue with the timing chain, at first you would hear the chain rattle on start up. I told him it should be fine, the chains rarely go out(dumb me, i know). Then one day he said the noise got really bad. I went over to his house, he started the truck and it was horrible.
I towed the truck to my house, started looking for ideas what it could be. StreetRod with his informative posts really helped me out. I finally took the plunge and dove into this thing. I found the driver side tensioner and guide was destroyed, there were peices of metal under the valve cover, the chain was so loose it was slapping everywhere, not sure if it skipped a tooth or not. the front tensioner and guide had hardly any wear, the balance shaft tensioner was broken, and the rear chain guide was broken as well. Needless to say, i had to pull the motor.
I made sure the timing marks were right on, i purchased a timing tool kit from Ebay. the little nipple on the drive side cam lobe was right near the pick up sensor, the passenger side camshaft slot was parallel with the head mating surface, and the crank pully was at 0 degrees TDC. I replaced all guides, tensioners, and chains. I purchased new jackshaft front and rear bolts, new crank pulley bolts and torqued everything down to specs.
Last weekend, i had everything put back together, cranked the motor and she started, however it was running a bit rough and i could hear a tapping coming from the driver side valve cover. I thought it may have a bent valve, so i ran a compression test and got readings of 150 across the board. Now when i installed the intake manifold i didn't change the gasket, i was planning on starting the truck and spray carb cleaner around various areas to see if the engine surges this weekend, but do you think a vacuum leak could be causing the tapping sound i hear from the valve cover? I know this could be causing the idling issue. Do you think i could have bent a valve, broken a valve spring? I need to get this thing done soon, this Phoenix heat is only gonna get worse from here on. Any help and thoughts would be greatly appreciated guys, thanks!!
2002 Explorer Sport
4.0 V6 4X4
I've been on this site looking around and getting ideas on how to fix my father in law's Explorer. He initially had an issue with the timing chain, at first you would hear the chain rattle on start up. I told him it should be fine, the chains rarely go out(dumb me, i know). Then one day he said the noise got really bad. I went over to his house, he started the truck and it was horrible.
I towed the truck to my house, started looking for ideas what it could be. StreetRod with his informative posts really helped me out. I finally took the plunge and dove into this thing. I found the driver side tensioner and guide was destroyed, there were peices of metal under the valve cover, the chain was so loose it was slapping everywhere, not sure if it skipped a tooth or not. the front tensioner and guide had hardly any wear, the balance shaft tensioner was broken, and the rear chain guide was broken as well. Needless to say, i had to pull the motor.
I made sure the timing marks were right on, i purchased a timing tool kit from Ebay. the little nipple on the drive side cam lobe was right near the pick up sensor, the passenger side camshaft slot was parallel with the head mating surface, and the crank pully was at 0 degrees TDC. I replaced all guides, tensioners, and chains. I purchased new jackshaft front and rear bolts, new crank pulley bolts and torqued everything down to specs.
Last weekend, i had everything put back together, cranked the motor and she started, however it was running a bit rough and i could hear a tapping coming from the driver side valve cover. I thought it may have a bent valve, so i ran a compression test and got readings of 150 across the board. Now when i installed the intake manifold i didn't change the gasket, i was planning on starting the truck and spray carb cleaner around various areas to see if the engine surges this weekend, but do you think a vacuum leak could be causing the tapping sound i hear from the valve cover? I know this could be causing the idling issue. Do you think i could have bent a valve, broken a valve spring? I need to get this thing done soon, this Phoenix heat is only gonna get worse from here on. Any help and thoughts would be greatly appreciated guys, thanks!!
2002 Explorer Sport
4.0 V6 4X4