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Yet another timing chain replacement thread

Started by Big_Richard, 20 December 2008, 06:38 PM

s class

My red 6.9 is bright silver alloy inside still.  Quite remarkable actually.  The blue one is quite heavily varnished - not as much as yours.  My 450SL's motor inside looks about like your photos.  I suppose it depends how the car has been maintained.  I think the 450SL has been running too rich for a long time, and I think that may have something to do with it. 

When we rebuilt the 280SE engine, we got it sparkling clean inside.  In the 200 000km since, I have used synthetic oil changed every 7500km, and despite these efforts its quite heavily varnished inside. 

I can't explain why the red 6.9 is so clean - it was a pleasant surprise. 


[color=blue]'76 6.9 Euro[/color], [color=red]'78 6.9 AMG[/color], '80 280SE, [color=brown]'74 350SE[/color], [color=black]'82 500SEL euro full hydro, '83 500SEL euro full hydro [/color], '81 500SL

WGB

Quote from: koan on 21 December 2008, 05:48 PM
Quote from: Patrick Bateman on 21 December 2008, 05:00 PM

Theres no hard layer, its just the brown colour everything inside has turned, I was under the impression this was abnormal as I've seen others that are all still silver inside. I'm guessing this is nothing to be worried about then  8)



Don't know about diesel oil, is it OK with petrol, doesn't break down or lose its lubricating properties?

koan


Oil specifically for Diesels has some extra detergent but otherwise is not much different.

I have seen inside engines where people proudly say they have never spent a penny on it - including servicing - and those engines are not only black coated with sludge but there are usually hard baked on deposits of true varnish.

Bill

pez

Diesel motor oil is simply superb.  Basically, it has double the additive package of conventional motor oil. It cleans and lubricates extremely well.  Plus, it is recently now available in semi & full synthetic versions, and even cold weather synthetic versions [5w-40] that are worth considering.

The only thing to gives thought to regarding the internal cleaning of the engine has to do with the possibility that internal grunge may be cleaned off which is keeping seals and gaskets together - for example, the oil pan gasket. All in all, I believe the risk is worth the reward - if you spring a leak, it was there before anyway, and now you need to fix it.

For truly quick internal cleaning, drain  your oil, change your filter, and fill with ATF.   Drive 500km's, and you will have a completely clean inside.  There is plenty of lubrication available in ATF, so no worries there.  You can also use the BG Motor Clean before you drain your old oil, too - it is similar in effect.  In either case, you'll then drain everything out and start with fresh oil and filter.

Big_Richard

#18
I find the thought of filling my engine with ATF a little frightening, I'm sure it has its benifits but ill stick with a short term diesel oil fill to start with and see how it cleans up ;) I have been meaning to give this a go for a long time but have never gotten around to it. This time, no excuses, ITs due for an oil change and i have my eye on a barrel of diesel oil ;)

I guess what i can do, is put in a 10litre jug of deisel oil and top up the rest of the way with 2.5 litres of ATF