2024 GX Engine Recall? (11 Viewers)
- Thread starter cartermatthews
- Start date
Sorry to hear that. Did you ask why timing chain guide broke? I am more concerned on this engine now. There was a suspicion about engine oil pressure that certain engine components didn't get enough oil lubrication. Timing chain guide will break if there is not enough lubrication. The metal chain will break plastic guide easily if there is not enough oil.
You have to keep receipts (of oil, filter, gaskets), mileage, and date of oil changes. At least that’s what I read on Lexus warranty page.
$5k-7k over the MSRP we paid (will depend on miles when we trade/take delivery of '26 but we only have 13k miles on it now). It was after recall was announced, but ours isn't showing the recall.
$5k-7k over the MSRP we paid (will depend on miles when we trade/take delivery of '26 but we only have 13k miles on it now).
It's generally not my experience that chain guides fail because of a lack of oil. The chains and guides are purely lubricated by oil flung & dripping around the engine - I can promise our engine does not use pressurized oil in any way to lubricate the chain or guides. You may be confusing the timing chain tensioner, which is powered by oil pressure, but it's a closed system - it does not squirt any oil out.
In fact, plastic guides are mildly self-lubricating. Without any oil, the metal chain will simply wear away at the plastic guide, scraping a groove into the plastic as it uses the shearing plastic to reduce friction.
In my experience, chain guides break because of poor material choice or design as the plastic becomes brittle over many years of heat cycles and interactions with oil. Same thing that happens with synthetic rubber gaskets that harden and leak over time.
There are manufacturing errors all the time - Toyota is not immune. Since I haven't heard about a rash of timing guide failures, I'd chalk it up to a fluke manufacturing issue not related to the main bearing failures we see for the V35A.
Hello everyone..I live here in San Diego..does anyone know which Lexus dealership is equipped with the software update for the transmission issues of GX550 issues? I have been checking with my Lexus tech but they dont have it yet..Thanks
I had mine sorted at Crown Lexus in Ontario, but I know Lexus in Newport Beach also had it done.
Why the discussion on transmission fixes on an engine recall thread? There's at least one thread specific to transmission issues. JSNS.
There are anti-wear additives in engine oil that diminish over time/use.
Bearing film thickness is tried and true for protection against bearing wear.
You want bearing surfaces in the hydrodynamic lubrication range where there is a layer of oil separating metal. Ref: Stribeck curve
Turbo engines run hotter than non-turbo engines and will most likely shear your viscosity in a couple of thousand miles.
When your oil’s viscosity shears down, your oil moves towards mixed lubrication range (some metal-metal contact), then eventually boundary lubrication range (metal-metal contact).
This YT video ELI5 it better:
If switching to a -30 weight, then consider one with a high HTHS to resist shearing (not all -30 weight oils are the same). Change it every 5k/6mos.
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