Sludge

[John Larson]

On 5/30/2013 4:24 AM, Grant Lenahan wrote:
> I happily use it for up to 7 3/4 qts.
>
> Has removed varnish or other build up from noisy lifters for me
>
> I have never had a heavily sludged motor, so i dont have experience with the nightmares Cody warns of
>
> Grant
> On May 30, 2013, at 4:40 AM, Al wrote:
>
>> I would use one quart Rislone, new filter, plus oil to top off. Check the dipstick for color change, apply to Kleenex or white paper towel. If it get real dirty before your mileage goal. Change all and do again.
>>  From Rislone site:
>> How much Rislone Engine Treatment do I install?
>> One bottle of 100QR Rislone Engine Treatment 1 quart (32 oz.) is designed to treat 4 to 6 quarts of oil, this allows you to replace a quart of motor oil at oil change time. You can also use it to “top off” your system between oil changes. Do NOT overfill. For larger systems, stationary engines and diesel trucks, use at 20% of engine oil capacity. For severely dirty engines, use two quarts of Rislone Engine Treatment and change the oil after 100 miles of driving.
>>
>> Al
>> Honolulu
>>
>>
>
The term "sludge" may be leading this conversation astray.  As was 
mentioned earlier, the composition of the sludge is far different than 
the "glop" or "mud" that many of us think of when we hear that word.  
Upon examination of the material that usually coats the pickup screen, 
we find a hard crystalized coating, which breaks up into grains of 
flakes when you attempt to dislodge it.  Unless it's a relatively minor 
problem,  most cleaners aren't even gonna come close to dissolving it.  
Immersing the pickup in carb dip (illegal for shops in many states to 
even have that on site) "might" break it up, but you can't just dump a 
couple of gallons of that stuff in the engine and let it sit overnight, 
'cause it'll remove layers of bearing material, eat all the plastic, 
rubber, and sealant, and do other bad things.  And the smell is both 
toxic and unbearable. Given time, it will eventually eat through the 
metal container in which it's sold.

John