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The mkiv Supra Owners Club

My Engine (Bottom End)


terribleturner

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Well it's a mess with loads of burnt oil, twisted and bent metal and now it's in pieces. It also seems that when my car has been in a garage getting work done they have put the wrong type of oil in, so a good reminder to everyone to look after their oil with regular changes and to know what goes in and that it's the right stuff.

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Well i have always put Silkoline in as im paranoid about the right oil, but it seem mineral oil had been added at some stage, and i have a feeling on at least 2 occasions with 2 garages. One place i've never really been happy with their work and so havn't gone back and the other just wouldn't have thought about it i recon.

 

As for the bent bit, not sure the name of the part but the bit at the bottom of the piston had warped/bent and would joint up at this point (picture).

ferrari%20piston.jpg

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good luck matey mines all rebuilt after a simalair thing and running like a sewing machine ,200 miles to go before number 2 tubby gets to play, and i get to flick my newley connected ecu chip thingy on

 

So by that are you not using the entire rev range to run it in?

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Hi All,

 

Well you have seen the pics and have heard what James had to say and the engine died due to oil pump failure ( Not complete Failure but full of sludge )

 

From what we have discovered it seems that there has been a build up of sludge in the engine this has been on going for a long time and could be due to a number of factors, wrong oil , high engine temps, filter failure ECT.

 

The damage has been quite extensive and has taken out No:4 big end and ovaled the rod cap, the crank journal on No:4 has also been badly damaged along with the piston which has been slapping the bore and taken a chunk out out the 2nd compression ring, as you might imagine the gudgine pin has also failed.

 

The rest of the engine components have suffered due to the amount of swarf running through but will be fine once cleaned and polished.

 

The Crank, rods,pistons and head are now with the engineers we use and we expect to here back today as to what can and cannot be saved.

 

The block is fine and depending on the report from the engineers will only need a flex hone.

 

Must say that we have seen the inside of many Supra engines but the state of the inside of this one ranks high in the Oh my God stakes.

 

Just goes to show that unless you really keep on top of things it will turn round and bite you on the ass.

 

Still couple of weeks and James will be low flying again :D

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Do you reckon another ten minutes and the engine would have seized entirely???

 

To be honest it is hard to say, I have known engines to keep running for another 50 miles in that condition.

 

One thing for sure is that any sort of high boost run would I think have caused N0:4 rod cap to have parted company with the crank and well it takes no imagination to know what would have happend then:bang:

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Have you got a pic of the fecked rod and cap? If the cap was coming off the rod then it implies that the bolt was stretching due to some upwards load. Maybe intermittent sticking of the piston as you mentioned there was some ring damage?

 

As for the sludge, this concerns me. That's two bottom end failures in as many months - both apparently caused by sludge blocking up the oil suction pipe or pump.

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As for the sludge, this concerns me. That's two bottom end failures in as many months - both apparently caused by sludge blocking up the oil suction pipe or pump.

 

Likewise with FTOs'. Since January this year I know of 5 other FTOs with big end failures [not including mine], all Mivecs :shock: :taped:

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