Engine Knock?
Hi-Rev Motorsports
Joined: Aug 2009
Posts: 4,898
Likes: 65
From: Northern Indiana
you can... I just buy the little bottles of the Lucas ZDDP and add it in with my oil...
in which I use Castrol Syntec or better... used Royal Purple last time but back this time...
Mobil 1 is good too I used that in the wifes van...
and my engine is clean on the inside and with Synthetic I change my oil every 25,000-30,000 miles...
in which I use Castrol Syntec or better... used Royal Purple last time but back this time...
Mobil 1 is good too I used that in the wifes van...
and my engine is clean on the inside and with Synthetic I change my oil every 25,000-30,000 miles...
Dodge+Ford = always ready
Joined: Apr 2011
Posts: 8,376
Likes: 112
From: Montana
you have a common issue... main rattle....
What happens is simply this. when you shut the engine off the oils slowly drains back from the oil pump and pick up tube and galleries back to the oil pan... this is simply called drain back...
Oil filters have Anti-Drainback valves but in the last couple years unless you buy a 10.00 oil filter the drainback valves are made of cardboard and quickly fail....
chances are if you use either a Fram Racing or a bosch distance plus or K&N it would stop.... or you can buy a 100.00 anti-drainback check valve and install it.
main rattle is common on fords and has been since the inception of time... they have no bypass/anti-drainback in the block like Chevy's do....
you will notice it more now with added main and rod bearing wear... beings in the last 5 years they have totally taken all the ZDDP out of the oil it doesnt matter how often you change it the oil has NO lubricity... and if you havent been adding ZDDP on every oil change the bearing are wearing faster than normal...
the dry start ups is what kills them... the Zinc and phosphate in the oils is what help protect the bearings during a dry start up...
OR... buy an Accumulator and install it.....problem solved
The ONLY oil that currently has a fair amount of ZDDP in it is Brad Penn oils... formerly Kendal oil
What happens is simply this. when you shut the engine off the oils slowly drains back from the oil pump and pick up tube and galleries back to the oil pan... this is simply called drain back...
Oil filters have Anti-Drainback valves but in the last couple years unless you buy a 10.00 oil filter the drainback valves are made of cardboard and quickly fail....
chances are if you use either a Fram Racing or a bosch distance plus or K&N it would stop.... or you can buy a 100.00 anti-drainback check valve and install it.
main rattle is common on fords and has been since the inception of time... they have no bypass/anti-drainback in the block like Chevy's do....
you will notice it more now with added main and rod bearing wear... beings in the last 5 years they have totally taken all the ZDDP out of the oil it doesnt matter how often you change it the oil has NO lubricity... and if you havent been adding ZDDP on every oil change the bearing are wearing faster than normal...
the dry start ups is what kills them... the Zinc and phosphate in the oils is what help protect the bearings during a dry start up...
OR... buy an Accumulator and install it.....problem solved
The ONLY oil that currently has a fair amount of ZDDP in it is Brad Penn oils... formerly Kendal oil
Senior Member
Joined: Dec 2010
Posts: 277
Likes: 2
From: Palmer MA
Originally Posted by mrslyfox
Sure sounds like its coming from the bottom end though... and it does go away as soon as it warms up some, cant get it to make a sound no matter what I do once she is warmed up. Gut tells me its nothing serious to worry about, but mind tells me I havent heard this sound in the previous 17 years of ownership, "something" has changed. Dont think I will be driving her cross country right now LOL
Thread Starter
Senior Member
Joined: Dec 2011
Posts: 785
Likes: 6
From: Iowa
Just got done adding the zddp, new oil, and Bosch Distance Plus filter... Took it for a good drive, got everything warmed up and circulating good, when I parked it she was quiet as could be, almost no engine noise... gonna let it cool down and crank her up. Should I see results this quick or does this take a few hundred miles or so? I think that was the earliest oil change I have ever done.. only 164 miles since I changed it, but would love to get rid of that annoying knock. If this doesnt help, going to just live with it, its not HORRIBLE, just annoying.