Let’s name this sound!
Thread Starter
|
Rock Crawling
Joined: Jul 2019
Posts: 261
Likes: 19
From: Dallas Texas
@Carlos Man More zinc will not help and can do damage. I am not a fan of engine treatments overall, but there are some cleaners that are better than others. The risk is getting your oil pickup screen plugged with debris, which reduces oil pressure,then you need to drop the pan.
Someone had a suggestion let me see if I can find it.
Someone had a suggestion let me see if I can find it.
Rock Crawling
Joined: Oct 2018
Posts: 381
Likes: 109
From: Boiling Springs, SC
@Carlos Man More zinc will not help and can do damage.
https://www.hotrod.com/articles/pit-...nc-motor-oils/
https://blog.amsoil.com/do-older-veh...inc-motor-oil/
Scroll down to the flat tappet vs roller cam section
After break-in, we recommend using an oil with at least 1,000 ppm ZDDP in a flat-tappet engine. That way, you’re providing your expensive engine with maximum protection against wear and horsepower loss.
Camel Trophy
Joined: Nov 2015
Posts: 3,560
Likes: 834
From: Staten Island, NY
as far as i have been able to tell, rotella t4 still contains at least 1000ppm zddp. it used to be higher, but is still effective.
and then there's this, that i pulled from a hot rod forum:
and then there's this, that i pulled from a hot rod forum:
- Well known and respected Engineer and Tech Author David Vizard, whose own test data, largely based on real world engine dyno testing, has concluded that more zinc in motor oil can be damaging, more zinc does NOT provide today’s best wear protection, and that using zinc as the primary anti-wear component, is outdated technology. .
- The GM Oil Report titled, “Oil Myths from GM Techlink”, concluded that high levels of zinc are damaging and that more zinc does NOT provide more wear protection.
- A motor oil research article written by Ed Hackett titled, “More than you ever wanted to know about Motor Oil”, concluded that more zinc does NOT provide more wear protection, it only provides longer wear protection.
- This from the Brad Penn Oil Company:
- There is such a thing as too much ZDDP. ZDDP is surface aggressive, and too much can be a detriment. ZDDP fights for the surface, blocking other additive performance. Acids generated due to excessive ZDDP contact will “tie-up” detergents thus encouraging corrosive wear. ZDDP effectiveness plateaus, more does NOT translate into more protection. Only so much is utilized.
Rock Crawling
Joined: Oct 2018
Posts: 381
Likes: 109
From: Boiling Springs, SC
The articles I added and quoted, including the RPI video are SPECIFIC to flat tappet motors.
Without wasting a bunch of time, I have no idea if any of the quotes above are related to newer roller cams or specific to flat tappet as well.
I'm also no engine expert by any stretch but when a company like RPI whom specializes in Rover motors, rebuilds and warranties based on the use of High Zinc Valvoline, I'm comfortable sticking to that.
However, LOTS of people dont run high zinc oil in these Rovers and they last just fine afaik........
Mine has over 200k on it now and the PO used Castrol with a quart of cleaning additive.
I've since switched to just using the Valvoline VR1.
Was just food for thought - I know oil is a touchy subject... not suggesting theres only one answer here....... Just sharing info
Without wasting a bunch of time, I have no idea if any of the quotes above are related to newer roller cams or specific to flat tappet as well.
I'm also no engine expert by any stretch but when a company like RPI whom specializes in Rover motors, rebuilds and warranties based on the use of High Zinc Valvoline, I'm comfortable sticking to that.
However, LOTS of people dont run high zinc oil in these Rovers and they last just fine afaik........
Mine has over 200k on it now and the PO used Castrol with a quart of cleaning additive.
I've since switched to just using the Valvoline VR1.
Was just food for thought - I know oil is a touchy subject... not suggesting theres only one answer here....... Just sharing info
Camel Trophy
Joined: Sep 2017
Posts: 3,824
Likes: 1,340
From: Mission BC Canada
@NewToTheTwo ZDDP as well as oil in general is bizzare subject. No harm in bringing up ZDDP levels, I spent a lot of time reading about the subject and still can not find a definitive answer.
It is not recommended to add more in most cases, unless you exactly what your engine needs and what is in your oil of choice.
But back to @Carlos Man problem is you want a engine flush that breaks the sludge down, rather than a heavy detergent that acts like a degreaser. Try reading this blog - https://blog.amsoil.com/is-an-engine-flush-good-or-bad/ That is the type of product you want, it may not help but it is worth a try.
It is not recommended to add more in most cases, unless you exactly what your engine needs and what is in your oil of choice.
But back to @Carlos Man problem is you want a engine flush that breaks the sludge down, rather than a heavy detergent that acts like a degreaser. Try reading this blog - https://blog.amsoil.com/is-an-engine-flush-good-or-bad/ That is the type of product you want, it may not help but it is worth a try.
Rock Crawling
Joined: May 2019
Posts: 428
Likes: 57
From: Red Deer, AB
Carlos Man... If you are lucky, then this
solution will work, if not, then the liners (ouch!!!) maybe? If you have the 4.6 V8 it could get very pricey, investigate the lifters by removing a valve cover and using a mechanic's stethoscope listen to each valve lifter while engine is running. Hope you are lucky...
TReK
Joined: Jul 2017
Posts: 3,387
Likes: 488
No, it's not your timing chain.
I'll bet you a hundred the cam bearings, rod and main bearings are worn out, and they are the noise.