Hello Folks:
Several months ago my son bought a new 2017 Jeep Wrangler JK Rubicon. It's a nice machine.
One thing he's noticed is that the 3.6 liter V6 has some fairly severe valve lifter clatter on startup (I typo'd 3.5 liter in subject line, unable to correct). It's done it since the day he bought it. This clatter only last a few seconds, presumably until oil pressure builds. It doesn't do it with every start. It never clatters with a hot motor that was recently shut off. It clatters with "cold starts", about 80% to 90% of the time. Overnight/outside temperature doesn't seem to matter. Cold starts where he lives can be 60 degree overnight "lows", so nothing extreme. But it will still clatter with a "cold start" 80% to 90% of the time.
This is a well known problem with this engine. See this link. His Rubicon sounds exactly like this one. EXACTLY.
https://www.youtube.com/watch?v=AMVNZXZJpFY&feature=youtu.be
The engine calls for 5W-20. He changed the factory fill at 1,500 miles with Mobil 1 5W-20 and used an OEM oil filter (a canister type element).
My son I were talking about this one evening and I suggested he try Redline 5W-20. My logic was that the polar nature of Redline's polyolester formulation might do a better job of keeping oil in the lifters (if that's even the problem). Using Redline, he changed the oil at 5K miles and once again used an OEM filter.
This is his daily driver and since putting Redline 5W-20 in two weeks ago the valve clatter has disappeared! The clatter is 100% gone but there still seems to be some kind mechanical noise in the valve train during a "cold start". The remaining mechanical noise it subtle enough that most people wouldn't notice it. The only reason we hear it is because we are listening for it.
Neither of us has any association or ties to Redline Oil, nor do we have an axe to grind against Mobil 1. As I said, this is a well known issue with this motor.
My question to you folks is this - why do you think Redline "fixed" the noise?
Cheers,
Scott and Jim
Several months ago my son bought a new 2017 Jeep Wrangler JK Rubicon. It's a nice machine.
One thing he's noticed is that the 3.6 liter V6 has some fairly severe valve lifter clatter on startup (I typo'd 3.5 liter in subject line, unable to correct). It's done it since the day he bought it. This clatter only last a few seconds, presumably until oil pressure builds. It doesn't do it with every start. It never clatters with a hot motor that was recently shut off. It clatters with "cold starts", about 80% to 90% of the time. Overnight/outside temperature doesn't seem to matter. Cold starts where he lives can be 60 degree overnight "lows", so nothing extreme. But it will still clatter with a "cold start" 80% to 90% of the time.
This is a well known problem with this engine. See this link. His Rubicon sounds exactly like this one. EXACTLY.
https://www.youtube.com/watch?v=AMVNZXZJpFY&feature=youtu.be
The engine calls for 5W-20. He changed the factory fill at 1,500 miles with Mobil 1 5W-20 and used an OEM oil filter (a canister type element).
My son I were talking about this one evening and I suggested he try Redline 5W-20. My logic was that the polar nature of Redline's polyolester formulation might do a better job of keeping oil in the lifters (if that's even the problem). Using Redline, he changed the oil at 5K miles and once again used an OEM filter.
This is his daily driver and since putting Redline 5W-20 in two weeks ago the valve clatter has disappeared! The clatter is 100% gone but there still seems to be some kind mechanical noise in the valve train during a "cold start". The remaining mechanical noise it subtle enough that most people wouldn't notice it. The only reason we hear it is because we are listening for it.
Neither of us has any association or ties to Redline Oil, nor do we have an axe to grind against Mobil 1. As I said, this is a well known issue with this motor.
My question to you folks is this - why do you think Redline "fixed" the noise?
Cheers,
Scott and Jim