I installed a timing belt on my 03 kia sedona. a piece of the cover broke off and caused the cam to jump 6 teeth. i reset the timing am now getting code p300 p303 and p305. guess it is time to replace the cylinder head?

If you find a belt with stripped cogs, it indicates that something in the cam drive system has jammed or stuck, overloading the belt and causing it to shear teeth or jump time. The most likely culprit is the camshaft, which may have seized due to engine overheating or lack of lubrication (low oil level or loss of oil pressure). Check the coolant level, oil level and maintenance records of the vehicle. Toyota has been recommending 7,500-mile oil change intervals for some of its vehicles - which has lead to oil sludging and other engine problems. Changing the oil and filter every 3,000 miles or every three to six months is still the safest recommendation.

Oh yes... If the timing belt broke or slipped the valve timing with be off causing the open valve to come in contact with the piston. Before you jump to conclusions take the upper cover off so you can check to see if the belt broke.

Before you spend a dime on parts for that engine, you have to find out if it is a free running engine or intermittent. Meaning the valves will hit the pistons when the belt breaks. If you drove it more than two inches after it broke, It might be shot, You will have to take the rocker cover/s off to check the cam/s and see if they are ok, Get the cover off the front, You will need a tensioner , and belt, the belt should have marks on it to mate up with the cams and crank, The marks will only line up when the cams are in position, you will have to spin the engine by hand to TDC, then turn the cams over to their marks, then put the belt on, making sure they align, Pull the pin on the new tensioner, you will be all set. The marks have to align, if the engine didn't get damaged, go ahead and do the belt, but, if it was damaged, You will need a bunch of stuff, mainly a new engine. The pistons could be shot, the cams broken, valves bent, etc. Not worth fixing, you can buy an engine for less than that. I had an engine go 11 miles before the cam broke in 3 pieces. never heard a thing. Hope this helps.

have your mechanic check valve timing and test the cam and crank angle sensors also check the wiring to the coils

it is under the timing cover at the front of the engine. under the cam belt pulley

no gas is usually the fuel pump / injectors / fuel pressure regulator.. The timing belt wont cause you to have no gas!!.

Most "common" cause is and engine misfire that causes unburned fuel to enter the converter and overheat/melt the catalyst. The converter is covered by 8yr/80,000 mile warranty for defects, and may be covered thru Kia. On a positive note we have a 2005 sedona shuttle van a work with 250,000 miles on it and qoing strong.

The recommended interval for changing the timing belt is in the owner's manual. Generally, this is every 60,000 miles.

Charlie

P.S. I found the data on the internet and, it is indeed 60,000 miles.

It's a bit of work for most unless you are a mechanic. I changed my 2003 kia (v-6) Is your a v6? CAUTION: be careful not to lose your timing marks on you dual overhead cams. They will spin a bit when you remove your old belt, due to the tension on the valve springs, so first, turn your crank pulley to the timing mark at top dead center. Also be careful for the timing cover. These are made of really cheap carbon fiber material that will erode upon handling....Again, unless you feel very confident in you mechanical abilities, don't try it....I will soon replace spark plugs on our piece of junk, and I'm not looking forward to that either., but I'm sure for the dealers cost of over $300, I can do it myself, even though I have to remove the whole intake assy.

Check to see if you have spark, Check the timing belt to see if it is broke or jumped teeth there are marks that need to be alligned on the pulleys.

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