Quote:
Originally Posted by Ian White
beware or running unheated WVO, you may have problems with rings sticking... Im going through a similar mess now...
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Marvel MM oil results sticky rings
Origional thread also has + response
http://www.peachparts.com/shopforum/showthread.php?t=258757&highlight=Marvel
Well it loosened the carbon as the compression has increased in the two low cylinders! # 3 was 320 is now 380 and #5 was 160 and is now 340! Drove it about 20 miles hard and fast, there was some carbon coming out the exhaust! Will be taking iton two longer trips this next week: Monday I'll be going over to the coast (SLO) and the SoCa gtg on next Saturday. The trip over the Grapevine should help!
Email response about if it reduced blow-by
The blow by was reduced and also with the nice drive to San Luis Obispo my rpms are lower than they were before! Before 65@3,250 now 2,850, before 70@3,500 now 3,150? and boy does it have power... but the glow plug light is now out (starts ok but the weather is warm. The relay works, so I'll be checking the plugs) and the fuel gauge is dancing (ground?). Oh, well gives me something to do...
I kind or recommended the above use of Marvel Mystery Oil to free up carboned rings. However, if you try this be sure to blow out any excess after soaking by cranking the Engine. Do not want any Hydraulic lock.
The reason I say the above is that I recommended to a person on benzworld who had Black smoke. He took before and after compression readings and while his compression went up his Black Smoke has switched to White Smoke.
Since he did the MM Oil Soak along with 2 other things including adjusting the ADLA; I am not sure if he cracked some Piston Rings with a Hydraulic Lock or the other things he did resulted in the White Smoke.
I did the MM Oil soak on my Volvo Diesel with good results. However, I was careful to blow out any excess Oil.
The benzworld guy is going to do another compression test over the weekend to as his battery petered out on his last one leavnt 2 cylinders in question.