Hi I have an IS200 SE 1999
It started making a rough engine knocking sound recently that is most noticable when accelerating to about 3-4 thousand rmp.
A while back (April 2009) I took the car for a service at toyota. They changed oil but screwed the new filter over the old filters seal (which obviously got stuck in place when they removed it) On the way home doing about 60 down a single carriage way I lost all the oil from the engine, I drove home about 1 mile with very low oil pressure (car stalled a couple of times)
Anyways I took the car to Lexus Plymouth last week and the tech said I had very low compression pressures, he said one was as low as 110 psi the others a little more the minimum the Work Shop manual says is 142 but shoul be 182 or more with a difference between each cylinder of no more than 14 psi.
I thought the engine was done based on what the Lexus Tech said (a couple of thousand to repair). But I measured the compressions myself and got the following readings;
From front of car back,
170 psi
195 psi
200 psi
200 psi
200 psi
195 psi
So it would seem I have a fault only on one cylinder. I did the "wet" test adding a small amount of oil to the low pressure cylinder and the pressure increased to 210 psi so this would suggest worn rings/bore.
However I would assume that if one cylinder was worn the others should show similar symptoms. There is also no oil on the spark plug, they are all in good condition with tan/brown/grey colour.
Any comments/help/advice very welcome.
Thanks.