The scope of work is large: the front bumper, radiator, all the accessories, and most of the emissions control system on the engine are removed simply to gain access to all the timing cover bolts. The solution? Replace the failed flexible gasket with more carefully applied flexible gasket and the issue shouldn’t reoccur. This is normal, however over time the flexible gasket that seals these surfaces together is subjected to more stress at this location, potentially leading to leaks. Slight irregularities in machining of these parts can lead to small differences in their surfaces in regards to depth (ie. This is much more cost effective, considering that a typical head gasket repair can cost upwards of 2,000. AutoZone carries a variety of head gasket sealants starting from just 15. ![]() The issue is fairly simple: where the engine block, cylinder head and timing chain cover all meet they form a T shaped junction. In this article, we will explain what a head gasket leak is, how it differs from a blown head gasket, how to identify a leaky gasket, and what you can do about it. Save Like 1 1 - 18 of 18 Posts Mike Murrell 2 I've been lucky. While the problem is similar, the repair of the GX460 is done in the vehicle as opposed to the teardown of some Toyota V6 engines that can also have issues. ![]() Similar to other timing cover oil leaks we’ve written about, the 4.6 liter 1UR-FE V8 engine in the Lexus GX460 can develop oil leaks where the timing chain cover meets the cylinder block and cylinder head.
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