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Since I got time and intake manifold removed, so I did intake valve cleaning again and this time VERY FAST.
Only 2 hours all these took and some only need B&G Air Intake Cleaner & Valve Cleaner liquid I had from 1st job + STP carburator cleaner, using lint free cloth as wipe.
Some cylinders need the 3M very fine brown scotch brite, like below :
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Back in 2022, for reference. Cylinder 1. Below :
ABOVE is Left side valve, Aug 2022, 35,000kmish.
BELOW is Right side valve. Aug 2022. 35,000 KMish
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I don't need it to be super clean.
As long as there is no build up higher/thicker than 0.2mm, I am fine. Airflow won't be disturbed.
There is no seat leak.... easy to test with boroscope and flooding the valve with cleaning chemical.
But if in a year or two will I tear down the engine....... valves will get proper cleaning and seating test and the cylinder head + piston carbon be cleaned
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Slideshow: A one-of-one U.S.-spec Mercedes-Benz SLR McLaren Roadster became even rarer after a factory-backed transformation at McLaren's headquarters.
