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Thanks for posting
The most common leaks on this engine are the valve cover, the crankshaft pulley seal, the seal in the front of the head, the oil pump seal the oil pan. the engine has a timing belt not a chain, all the seals I mentioned are under the timing belt cover . The top cover half can be removed to inspect the belt and to see if there is oil on the belt and inside the cover, the water pump is driven off the belt so anytime the belt and seals are replaced the water pump should also be replaced.
Thanks for the reply, it simply means that if there are oil deposits inside the timing cover the seals I mentioned should be replaced, not just one or two but all, if there is oil on the timing belt it comes from the leaking seals. The most difficult part is to get the front crankshaft bolt off. they can be extremely tight. The plastic timing cover is held on with some 10mm size bolts, there is a front engine mount that has to be removed, the camshaft pulley is removed to get the cam seal out, the oil pump is removed to replace the shaft seal and the o-ring seal. So basically it takes some common tools like ratchet, sockets, extensions and a breaker bar and a chain wrench to grab the front pulley to keep it from turning when the bolt is removed