Hyundai Repair: 2002 hyundai sonata timing belt broke, 2002 hyundai sonata, thermal contraction

Question
Hi
I have a 2002 sonata with the 2.4 liter engine and the timg belt went now I have alot of damage.Eight valves bent,valve guides damaged,I wanted to know how to change the valve guides and I could use some help with timing marks also.I am also having trouble understanding how to set the time on the balancer belt that also broke.Any help would be great. thanks Mike

Answer
You'll need a special tool to hammer out the guides and hammer the new ones in place.  They need to be installed to a particular depth.  There's also a special tool to set this depth.  Putting the head in a freezer will help make the old guides come out more easily due to thermal contraction.  Similarly, putting the new guides in a freezer will help them contract and install easily.

You might check the pricing on a new head and aftermarket remanufactured heads.  As I recall, the cost of the valve guides (and the associated additional labor) was enough to make a new head more cost effective.  I'm not sure whether aftermarket remanufactured heads are available, but if they are, you may be able to get one already loaded with the valves and springs for a better price than you'd pay just for the parts you need.

As you look at the crankshaft sprocket, there will be a small sprocket in front of a spacer plate, which will be in front of a larger sprocket.  There will be a notch in the spacer plate that will align with a pointer on the oil pump case.  When you remove the spacer to service the balance shaft belt, you'll see a dot on the larger sprocket which aligns to the pointer in the same position as the notch would.  On the balance shaft sprocket, there will be a dot or line which will line up with a cutout on the rear of the oil pump case.  The mark should be at 9 O'Clock when aligned.

Also, when doing the timing belt on this engine, it's important to realize that the front balance shaft sprocket (the one driven by the main timing belt) turns in a 3:2 ratio with the balance shaft.  When aligning the marks on this sprocket, turn the sprocket a little bit away from alignment.  If it tends to return, you have it set correctly.  If it tends to continue turning in the same direction, you need to rotate it 360 degrees.