Airbag

so it over heated AND jumped time due to a weak tensioner ? ... something doesnt sound right

did the water pump seize ? maybe i missed part of this thread but the first question i would ask is why did it overheat..

GTA_Driver

So that will solve your passenger size 30-30-0 compression. And you got 0 compression on all cylinders on the driver's side?

You don't bend valves if the car overheats. If the valves are bent, something caused it. Weak tensioner?

Check the status of the driver's side head. Once all the valves are fixed, do a full timing belt service - replace tensioner, idler pulley, thermostat, water pump - the works.

jseklund

I don't claim to understand cars completely, but I don't believe 1 bent valve will cause lack of compression on 3 cylinders. If the timing was off enough for the other valves to be open on the compression stroke, they probably are bent too - but maybe not enough to see. How did you determine the other valves are still good? Visual? Or did you fill the valley with liquid and test if the valves leak?

I also apologize - I did not realize you had no compression on the driver's side. This could make things a little more interesting in regard to a new engine being more cost effective....

mlake

Motor torn down, the motor over heated due to the line going to the coolant bottle broke . Guess timing jumped due to no coolant on impeller for resistance . Just my theory water pump is not seized . Got valve ordered 7.99 lifter 15.00 not to bad yes I did fill all chambers with water let sit for four hours never leaked down .

mlake

Drivers side head that had zero compression . Held four hours and never leaked down .

jseklund

Just a thought - when I did this I also ordered the gasket for the valley pan - it rarely leaks, but since I was in there and the car had some mileage on it, I figured I may as well do it right. I would also replace all the timing belt parts while you are in there - the job is good for 75,000 miles roughly, so why tear it down again?

Never worked on that engine - but it looks like a good time for O2 sensors too...I don't know how you got the exhaust off the head while it was still on the car...must have way more room than the 2.7T.