Oil flush after rebuild and new turbo

[Wayne]

I guess like someone pointed out earlier I have just had a full rebuild and new turbo, new oil sump was placed too with pick up pipe, I guess we all have our own reasons and opinions

I respect you have had a lot of work carried out but the cylinder block was not touched so you still run the chance of moving debris / sludge.

So no I would not have chanced flushing it.

[XMC1980]

I'm going to service the car at 1k miles from rebuild and see what compressions I get and the indication of the oil, as far as I'm concerned the car seems much more quiet and super steady on idle, Wayne it's a very documented and tested discussion about it being good/bad, although I sided with the idea of doing it I was only 90% confident with so much contradiction there is always an element of doubt.

I think the general rule should be not on a high mileage car and only on tick over?

I really would like a factual answer to this debate, I could be completely wrong but I need fact and proof to believe it.

[XMC1980]

The reason why people say it's not good is because manufacturer's need to protect themselves, statements in the owners manual are a liability issue. Why would a company say go ahead and use oil additives?
They would be on the hook for the warranty if some guy put paint thinner in there and drove around.
It is easier for them to make a blanket disclaimer like use no additives, then intoduce their own later if needed."
As far as I know, Aston Martin and Ford both use idle flushes?

[rockmonkey69]

I had my whole engine in the tank for cleaning at a machine shop after machine work was done.

[XMC1980]

I had my whole engine in the tank for cleaning at a machine shop after machine work was done.

Huh 

[rockmonkey69]

Machine shops normally have the facility to clean engine parts, it's basically a large tank designed to house heads and blocks with some strong solvents. I normally have the head sent there before I do porting work and then again after the head is skimmed to get rid of any swarf or metal filings.

The whole engine was clean after I got the parts back from the machine shop, all the channels in the entire engine were clean. I'm also skeptical about off the shelf engine flushers, I question their effectiveness, it might remove some grime but just because the oil looks cleaner doesn't mean there isn't still carbon build up that it couldn't remove. Only way to know for sure is to see with the whole engine in pieces. There are limits as to how strong the solvent used in off the shelf flushers, otherwise the engine would effectively be running on water while the flusher is in there and the seals would be damaged.

[rockmonkey69]

My head during assembly

[XMC1980]

I had this done too but I don't get the relevance to this discussion?


picture share

[rockmonkey69]

It made off the shelf cleaners redundant for me. There's no need for off the shelf cleaners when the whole engine had just been rebuilt and cleaned?