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Old 08-30-2009, 05:39 AM   #4 (permalink)
vtec-e
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Join Date: May 2008
Location: Ireland
Posts: 506

De Yaris - '04 yaris T2
90 day: 69.55 mpg (US)
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Hi RH77.
I didn't use seafoam or anything similar. Which is a pity because i could have done better with the car. I must look up something similar here. All i used were those bottles of cleaner that go in the fuel tank. I would question their effectiveness having seen the engine apart
My intake temps were 140 to 170f, depending on the weather and whether i was driving at night or day. Once it got to 170f i had to dump heat, which was uncomfortable given it was summer at the time!
No PCV catch can either so that may have contributed to carbon build up.
I'm tempted to check out the big end bearings but that will involve going under the car and removing the bellypan etc. which will be hard given my lack of free time. I'm keen to learn their condition as there was a rattle from the engine and i thought it was the pistons but having seen the cylinder walls i'd say the pistons are fine.

ollie
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