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Its worth a shot mate.

I had a friend at work, had a 20valve Toyota motor, that was rebuilt.

The place that installed it filled it up with Mobil 1, fully synthetic from the start. It wouldn't make ANY power, just blue smoke!! Shows how good synthetic oil really is as a lubricant, as nothing bedded in at all

After much bitching with the workshop without getting anywhere, his old man drained the oil, ad replaced it with some cheap mineral oil from Kmart, it was about 10bucks for 5litres. filled it up, new filter etc, and took it for a 4 hour drive, loading it up as much as possible e.g 5th gear up hills, high revs, downhills in low gear high revs etc. Next day, same thing, 4 hours of non stop driving, as much varying the revs as he could.

It started to come good

Two weeks later with the same oil in it, after about 2000km of driving, it was back to normal, and smiles all round

I'd try it mate, serioulsy it should help. I'd get some cheap mineral oil, new filter and give it a shot. It it starts to come good, keep going with it until its better, and then maybe run some Nissan 7.5-30 semi-synth for a few changes

Just seems to me that the bores/rings never had a chance to bed in, especially with the synthetic oil used to run it in. A big no-no

My 2c anyhow......

Chris

Well I guess I've got nothing to lose and it buys me some time to save some money ( yeah right ! )

Still, I do want to hear more from anyone else with regards to these pistons and rings so I can get well balanced optinion. At the moment I'm not sure if I could recommend them to someone building an engine.

give it a try mate, long weekend coming up and all should mean you can rack up some serious kms. Chances are it will help, and for the cost ( 'bout 20 bucks worth of oil, and maybe $80 in petrol depending on kms) its well worth the effort

Also stay away from leeting it idle to warm up, turn the key and drive normally as soon as it starts, it might help the process a little quicker (no boost though until warmed up)

Chris

Look, there's nothing wrong with arias pistons and rings - provided they are fitted correctly and run in correctly.

By the sounds of it the guy who put the full syunthetic oil for the run in didn't know WTF he was doing. U NEVER use synthgetic oil for the run in.

Try chris32's option, and if that doesnt work u may have to go for a re hone on the cylinders.

Arias are good pistons (most piston companies are supplied their rings by wiesco) so dont believe the BS someone is feedig you.

  • 2 weeks later...

Actually, I was so disheartened by the whole issue that I've only just started trying to sort things out. What I have done ( you ready for this ?? ) is poured 1 litre of Kero into the engine oil ( engine at operating temp ) and let it idle for 10 minutes. Watched the engine temp rise slightly, heard the engine making less than purring noises and watched the idle drop slightly. I would imagine this level of anxiety would be something like watching a family member being tortured :D

Anyway, I drained the sump and oil cooler then replaced the filter and filled her up with 30W mineral oil and have since put about 200kms on it. Will keep going till I've clocked up 1000kms and then do a comp test to see what's happened ( if anything ).

Next I'm going to try the sand in the cylinder's trick, then flush with MEK ( Methyletherketone ) and stuff a banana skin down each plug hole to build compression :D

Eg. I'm going to pretend I own a holden ( joke.....)

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