Parts for your 2007 Toyota Aurion-Oil seals

2007 Toyota Aurion oil seals — what they do and when to service them

Oil seals are absolutely used on the 2007 Toyota Aurion (GSV40R). Toyota’s service literature for the Aurion and its 2GR‑FE V6 and U660E automatic transaxle details multiple seals: crankshaft front and rear (rear main), camshaft seals, timing cover/oil pump seals, and transaxle drive shaft/output seals. Technical references consulted include the Toyota Aurion GSV40R Repair Manual (2006–2012), Toyota 2GR‑FE Engine Repair Manual, Toyota U660E Automatic Transaxle Repair Manual, and the Toyota Genuine Parts Catalogue for GSV40.

On this V6 Aurion, oil seals do the quiet but vital job of keeping engine oil and transmission fluid where they belong. Under the bonnet, the front crankshaft seal, camshaft seals, and timing cover/oil pump seals prevent engine oil from sneaking past rotating shafts and pressurised housings. At the back of the engine, the rear main seal stops oil from escaping at the crank where it meets the gearbox. In the transaxle, the drive shaft/output seals keep Toyota WS ATF from weeping around the CV stubs.

These seals aren’t a scheduled replacement item, they’re replaced if they leak. Smart servicing for a 2007 Aurion means watching for tell‑tales:

• Fresh oil mist around the crank pulley or timing cover
• Oily residue at the bellhousing join (possible rear main)
• ATF sling on the subframe or inner CVs (drive shaft seals)
• Burnt‑oil smell or minor drips after parking

If a leak shows up, the fix ranges from straightforward to involved. A front crank seal is typically tackled with the harmonic balancer off and careful seal installation, cam and timing cover‑related leaks can be more labour‑intensive on the 2GR‑FE due to the chain drive and front cover. A rear main seal requires separating the transmission from the engine. Drive shaft seals on the U660E are common service items and are replaced when a shaft is out.

Best practice for owners and workshops:

• Inspect for seepage at every service or tyre rotation, especially past 150,000 km.
• Use genuine or high‑quality Viton seals and the correct fluids (SAE 5W‑30 engine oil meeting Toyota spec, Toyota ATF WS for the U660E).
• Lightly oil the seal lip on install, check shaft surfaces for grooves, and seat squarely with the proper driver.
• Ensure the PCV system is clear, excess crankcase pressure can force oil past good seals.
• After any seal work, recheck for leaks once heat‑soaked and after a few hundred kilometres.

Popular questions

Does the 2007 Aurion have a rear main seal and is it hard to replace?
Yes. The rear main seal sits between the engine and transmission. Replacement is labour‑heavy because the gearbox needs to come out. It’s typically bundled with a clutch on manuals (not common on Aurion) or during major transmission work on the U660E auto. A quality seal and careful installation are key.

Which fluid should be used after replacing a transaxle drive shaft oil seal?
Use Toyota ATF WS only for the U660E. After fitting the new seal, refill and set the level at the specified temperature range using the correct service procedure. Mixing fluids or overfilling can cause shift issues and fresh leaks.

Can a blocked PCV valve cause oil seal leaks on the 2GR‑FE?
It can contribute. If crankcase pressure can’t vent properly, oil is pushed past the weakest point—often a tired seal or gasket. Checking and replacing a sticky PCV valve is inexpensive insurance against future leaks.