Low Oil Viscosity Causing Lifter Noise?

[OVERKILL]

Originally Posted By: LeakySeals

Where you getting stoddard add from. Is that the Pale oil?


Pale oil is what I'm referring to as bright stock (may not be the correct term for it). Stoddard solvent is from one of the PDS's on MMO we had floating around on here IIRC.

 

[LeakySeals]

Originally Posted By: OVERK1LL
Originally Posted By: LeakySeals

Where you getting stoddard add from. Is that the Pale oil?


Pale oil is what I'm referring to as bright stock (may not be the correct term for it). Stoddard solvent is from one of the PDS's on MMO we had floating around on here IIRC.


OK thanks, must be the "Fine White Mineral Oil".
http://en.wikipedia.org/wiki/Stoddard_solvent

I've only seen Stoddard oil listed in name on Techron complete fuel system cleaner MSDS.

 

[OVERKILL]

Originally Posted By: LeakySeals
Originally Posted By: OVERK1LL
Originally Posted By: LeakySeals

Where you getting stoddard add from. Is that the Pale oil?


Pale oil is what I'm referring to as bright stock (may not be the correct term for it). Stoddard solvent is from one of the PDS's on MMO we had floating around on here IIRC.


OK thanks, must be the "Fine White Mineral Oil".
http://en.wikipedia.org/wiki/Stoddard_solvent

I've only seen Stoddard oil listed in name on Techron complete fuel system cleaner MSDS.


http://householdproducts.nlm.nih.gov/cgi...as=TblChemicals

Marvel Mystery Oil - 20-30%

 

[Merkava_4]

Originally Posted By: Phishin

Is the rattle causing damage or is it just annoying?


The collapsed lifter will eventually destroy the corresponding lobe on the camshaft.

 

[SteveSRT8]

So true. I am always amazed at all the ways people analyze their oil. Smelling, tasting, feeling, etc., do not yield quantitative results!

 

[crainholio]

Originally Posted By: Phishin

and for the guy who just posted above, no, this truck doesn't have hydraulic valve train...I don't think. It's old school.


The factory engine for your truck had hydraulic lifters, but whether they were flat-tappet or rollers I'm not certain. If you've adjusted the lifter preload incorrectly you'll want to correct this promptly.

Every GM V8 I've worked on that used stud-type rockers liked zero lash plus 3/4 turn of preload, but that was in marine applications where the engine was turning high RPMs for most of it's service life. A street use engine may like 1 full turn of preload, but I would not recommend any more than that.

If your lifters are adjusted properly, then Rotella T6 as mentioned above is a good next step. Get the MMO out of there, it's done its job and then some.

 

[LeakySeals]

Originally Posted By: Phishin

I'll just dump the oil and refill with T6 15w40. And knock off the MMO treatments. But it sure did knock some junk loose.

As far as I know the T6 full synthetic only comes in one flavor. 5w40. The rest are synthetic blends or dino (T5,T3). I would use the T6 5w40 on your rig, 15w is way too thick at startup, where most engine wear occurs.

 

[antiqueshell]

Originally Posted By: TFB1
I'm of the opinion dumping a load of MM into M1 is ruining perfectly good oil... The M1 by it's self would do a great job of cleaning if only given some time...


x eleventy billion.

Get that snake oil out of there, it has no business being in any engine less than 40 years old. LOL

 

[UNC017]

Originally Posted By: Phishin

and for the guy who just posted above, no, this truck doesn't have hydraulic valve train...I don't think. It's old school.


You're confusing hydraulic lifters with roller lifters. The smallblock chevy had hydraulic lifters pretty much from day 1 in the 1950s, except for certain high-performance versions. But it was very late to the game in getting converted to roller lifters, at least for truck applications. Chrysler and Ford rollerized their smallblock valvetrains in the 80s, but Chevy held out a while longer.