Engine Failure problems of the 1998 Toyota Sienna

Engine light came on in my 1998 Toyota Sienna on i75 in atlanta GA while visiting friends, was able to get to median before it died. Had it towed to independent mechanic who verified sludge build up. Called Toyota about engine failure. Was told to take van to a Toyota dealership in SC (where we live) towed the van home took it to dealership who also verified sludge build up. Was told by Toyota that they were aware of the problems in their engines but was not going to pay for engine replacement because we did not have receipts proving that oil/filters changes were made. We changed our oil every 3000 miles without fail. If we didn't engine would have died sooner. Toyota did say that we could pay for repairs $9000 and then submit receipts for review and may be reimbursed for repairs. Still fighting with Toyota, have made complaint with bbb. Police were called to the scene, I was alone with 4 children.

My car's engine failed at 20,000 miles. The dealer said it was due to sludge, based on my not changing the oil often enough. I had changed the oil every 6000 miles, not every 3000 miles. The dealer, jim coleman Toyota of bethesda MD stated that I was at fault and that Toyota would do nothing for me. First coleman flushed the engine, at a cost of 1000. When this repair only held for 2000 miles or so, I was told I needed to replace my engine. I did so at ernie's, a top-rated repair shop in bethesda (consumer check list)at a cost of 5600, considerably less than Toyota's price of 7500. I have faithfully changed my oil since that time on or before the 3000 mile mark. The engine has again failed due to sludge build-up!!! I am now expecting that Toyota will replace the engine at no cost to me, but I am concerned that there will be some catch to this. . .