S70 wont start after water pump/timing belt replacement Topic is solved

ssalak · Post by **ssalak** » 04 Sep 2016, 17:49

Hello folks: The water pump bearing seized in my 1998 S70 causing the timing belt to jump off the cam sprockets. This occurred while I was driving around 40mph. I replaced the water pump, set the cam and crank timing marks per spec and installed a new timing belt. All buttoned up now, but it will not start. Not a single pop from any cylinder. Also, when I crank the engine, the starter sounds different, like it's trying to overcome more resistance. Any thoughts on what to check are greatly appreciated!

Thank you,
ssalak

Post by **polskamafia mjl** » 04 Sep 2016, 18:04

There's no nice way to put this, but you are aware that these motors are interference motors, right?

After installing the belt but before starting the engine its a good idea to spin the crank by hand to make sure everything turns like its supposed to. What happened when you did that?

Post by **misha** » 04 Sep 2016, 18:05

Sounds like you have some bent valves.
These engines are interference engines and timing belt failure and "jumping" for more than two teeth is game over.

Post by **tryingbe** » 04 Sep 2016, 18:47

ssalak wrote:The water pump bearing seized in my 1998 S70 causing the timing belt to jump off the cam sprockets. This occurred while I was driving around 40mph

The Volvo 5 cylinder is an interference engine which means if the timing belt jump/breaks, the valves are bent. Either put in a new engine or take the head off and fix it.

Post by **rspi** » 04 Sep 2016, 20:02