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The mkiv Supra Owners Club

Major oil change/clearout


Alex

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Hmmm...after speaking to PaulE and reading a thread on the SXOC, I'm tempted to take my next oil change to the extreme.

 

Is it worth my while taking off the sump and having a real good poke around and clean up to make sure no crap is not getting flushed out with the oil changes.

 

Or should I give the car a "flush"with proper engine flush?

 

Or both?

 

Is it worth it? Ther car has done 110,000miles and go knows what its been through before I got it (servicing wise).

 

If I take the sump off, do I just need a new gasket to put it back on with? Is it a partucularly tricky job??

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Guest Martin F

There is no sump gasket, you just use FIPG.

 

I didn't think you could remove the sump on our cars without unbolting the cross member and some other gubbins. In which case it's a lot of work for just a poke around.

 

I'd probably recommend just using an engine flush. Have done this before on the MKIII and no harm came of it. But inversely i don't know if it did much good either.

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Alex,

 

Just a word of warning, you may do more harm than good flushing oil in a high mileage car.

 

Quoted

 

"In an old engine you really don't want to remove all the deposits. Some of these deposits help seal rings, lifters and even some of the flanges between the heads, covers, pan and the block, where the gaskets are thin. I have heard of engines with over 280,000km that worked fine, but when flushed it failed in a month because the blow-by past the scraper ring(now really clean) contaminated the oil and screwed the rod bearings."

 

I wouldn't do it...

 

Gaz.

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Gaz,

 

I too thought that, but ours is a modern engine which is much better. This quote AFAIK can be applied to less modern engines.

 

And at the end of the day what's to stop the crud shifting one day and starting a leak anyway...

 

Either I'll highlight a problem or have nothing to report...you never know my engine could be pretty clean.

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Not that I'm saying its the way to do it but... The guy that did my first oil change works on Ferraris for a living. I wanted him to flush the engine first and he said it was better to flush it through with some normal clean engine oil.

He emptied all my oil, filled it up with Shell Helix, ran it for a while and then emptied it all again!!! - Talk about waste of oil! - Still, I didn't pay for it! :)

 

I don't know if that's better or not, but apparently that's what they do with Ferraris:conf:

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The problem as I see it is that I don't know what's happened servicing wise before I got the car....

 

The oil IMO turns black far too fast.

 

I think the best way to handle this is to remove the sump if I can...see how grotty it is inside.

 

If I can't I guess I'll try multiple flushes...with normal oil...possibly some really thin stuff to get in all the nooks in the few minutes I idle it through the system for.

 

Would it be ok to try and use a magnet on a stick to gently look for metal fragment in the sump (through the sump plug whole)...assuming I can't get the sump off.

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