Hello, I have a 2003 Tiburon 2.0L with 143,000km on the engine, recently over the last 2 weeks, after I changed the oil, and air filter, I have been noticing the engine idling rough, if i turn on the A/C it goes away. also there seems to be a lot of valve noise, some at idle, but mostly when it rev's up or down past 2000 - 1200 rpm, its been getting louder and more noticeable. This valve noise also goes away when the A/C is on.

I have tried putting in some ejector cleaner and some Premium fuel, I'm thinking that it could possibly be fuel filter or something, since I didn't notice the valve noise with my last full up until after I got to 3/4 of a tank.

Also I have yet to replace any of the belts

Anyone got any ideas???

Any help would be appreciated.

Dear jschof,

143,000 km and yet to replace a belt!!!! Danger, danger. Your symptoms sound very much like skipped timing, caused by broken rubber teeth on the timing belt, caused by exceeding the change interval on the timing belt. Pull the upper timing cover on your Beta engine. If broken rubber teeth are not immediately evident, slowly rotate the engine crank pulley Clockwise by hand as you inspect.

Beware that broken timing belt teeth happen about 100 km before total belt failure.
This is such a high damage penalty from a broken belt, just replace the timing belt...it is a no brainer for the decision to replace! Once you have replaced your own belt on the Beta the first time, the second time takes you only 20 minutes.

If your timing belt breaks with the engine running, you WILL have catastrophic engine damage, at least USD $2,500 or more. CDN is probably way more.

Byron

HI, Thank you for the reply
I checked the Timming belt, there are no missing teeth and it seems tight, It do agree it should be changed.
The other belts are a little loose, Should i be changing the water pump, idler pully, and tensioner pully at the same time? Also would it hurt not to put the AC belt back on??

Thanks