My wife was driving the car and she said dash lights started popping on and before she could do anything, the engine shut off.
I went to see what was going on. Car engine would spin but not crank. I suspected possibly the starter and towed it home.
When I got it hone I noticed the water pump serpentine belt had broken.
At that point I suspected possible timing chain issues as the engine has 240,000 miles but runs like brand new. Always PM all my vehicles with the best oil and parts I can buy. Mobil One Oil and Mobil One Filter.
I tore the engine down and found that the timing chains (3) were all intact. Nothing broken and chains were really not that bad. Premium quality!
Having done the tear down I figured it was a great time to replace the timing with a complete new set of chains,gears,tensioners, etc. Had all the timing marks as per stated. (I own the Shop service manual) and followed instructions to the tee double checking everything. I know I have that all right as I have turned wrenches for over 50 years.
I put everything back together using new gaskets, belts, water pump, new starter etc., nothing short changed!
After completing the repair I go to start the engine and nothing changed, still spinning but not cranking.
My question: The serpentine belt broke (it has 2). The one that broke is the water pump. I can't see how there could be any valve damage as it has timing chains which were not broken. Do you think it overheated and wasted the heads and head gaskets? I can't think of anything else it could be. Interference or non-interference engine plays no part here as it has timing chains and therefore a serpentine belt issue should not bend valves.
I went to see what was going on. Car engine would spin but not crank. I suspected possibly the starter and towed it home.
When I got it hone I noticed the water pump serpentine belt had broken.
At that point I suspected possible timing chain issues as the engine has 240,000 miles but runs like brand new. Always PM all my vehicles with the best oil and parts I can buy. Mobil One Oil and Mobil One Filter.
I tore the engine down and found that the timing chains (3) were all intact. Nothing broken and chains were really not that bad. Premium quality!
Having done the tear down I figured it was a great time to replace the timing with a complete new set of chains,gears,tensioners, etc. Had all the timing marks as per stated. (I own the Shop service manual) and followed instructions to the tee double checking everything. I know I have that all right as I have turned wrenches for over 50 years.
I put everything back together using new gaskets, belts, water pump, new starter etc., nothing short changed!
After completing the repair I go to start the engine and nothing changed, still spinning but not cranking.
My question: The serpentine belt broke (it has 2). The one that broke is the water pump. I can't see how there could be any valve damage as it has timing chains which were not broken. Do you think it overheated and wasted the heads and head gaskets? I can't think of anything else it could be. Interference or non-interference engine plays no part here as it has timing chains and therefore a serpentine belt issue should not bend valves.
Jan 26, 2019 at 1:19 PM
