On the 4.7 V8, the front timing cover gasket weeps at the Bank 1 head-to-block junction — a failure common enough that Toyota issued a service bulletin on it. We do the full reseal at your home, done once, done right.
The 2UZ-FE 4.7 V8 carries a large front timing cover that has to seal against three different surfaces at once: the block, and each cylinder head. The trouble spot is the step where the Bank 1 (driver's side) head meets the block — a junction where the gasket must bridge two surfaces that expand at slightly different rates with every heat cycle. After enough seasons of Ontario's freeze-and-bake cycle, the gasket gives up right at that step, and oil begins seeping down the front driver's side of the engine.
This isn't a rare fluke — Toyota acknowledged the pattern in a technical service bulletin. The leaked oil tracks down across the front of the block and finds the exhaust manifold, which is the burning smell owners notice at stoplights long before they ever see a drip on the ground. Because the smell precedes the puddle, the leak is often further along than it looks.
The repair is honest, labour-heavy work: the front of the engine comes apart — and on a timing-belt engine, that means the belt comes off too — the cover comes off, every surface is cleaned, and new gaskets and seal go on. That overlap is also the silver lining: if your timing belt or water pump is anywhere near due, this teardown and that one are largely the same teardown, and combining them saves you the better part of a second labour bill.
If your Toyota is doing any of these, this is the likely cause:
Oil meeting the exhaust manifold is the part not to sit on — it's the smell today and a smoke-show or worse on a long climb tomorrow. Beyond that, it's a steady drain on your oil level between changes on an engine that owners famously never check because 'it's a Toyota.' The gasket failure only widens with heat cycles, and the oil tracking down the front of the engine eventually contaminates the timing belt area — rubber and oil being a famously short marriage.
Yes — it's front-of-engine work done from above, no hoist required. It takes most of a day because the teardown is deep, but it's exactly the kind of labour-heavy, facility-light job that mobile service is built for. Your truck stays in your driveway the whole time.
The gasket costs little — the bill is the many book hours of teardown to reach it, charged at dealer hourly rates. Some shops also quote the timing belt work that overlaps it as a separate ticket, doubling up labour you should only pay once. We quote one flat price for the complete reseal — and if you bundle the belt and pump, one flat price for all of it, settled before we start.
If it's within sight of its interval, absolutely — the belt has to come off for this repair anyway, so the extra cost to fit a new belt, pump and tensioner is a fraction of doing it as a standalone job later. If your belt was recently done, we simply reinstall it correctly. We'll check your records and the belt's condition and tell you straight.
Fair question — front-of-engine leaks on the 2UZ get misread. We degrease the area and trace the leak (dye if needed) before committing to the big teardown. The TSB-pattern leak shows at the Bank 1 head-block step specifically; if yours turns out to be a cheaper fix higher up, that's what you'll hear from us.
Send it over for a free second opinion. I'll tell you straight what the job actually involves — and if their quote is fair, I'll tell you that too.
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