Why is it that my lifters become noisy when hot?
The engines fine when I fire it up when cold but it becomes noisy and the lifters tap when hot . This is opposite to what most peoples experience of noisy lifters is!!
The engines a 2.0 16v Ecotec and I'm using 10/40 semi.
After an engine rebuild (which included a new oil pump) in July '02 I had to take it back three weeks later as it became noisy. It was found that the big end size of three of the con rods was too big and they were resized and a new head, sump and rocker gaskets were fitted.
In January of this year I took it back for the same problem and the garage replaced the oil pump, main and big end bearings and fitted new hydraulic lifters.
BUT IT'S STILL NOISY
The warranty's up in two days time and I'd like to sort this out once and for all.
What could it be as its driving me crazy!!!