Parts for your 1999 Toyota Crown-Engine mount

1999 Toyota Crown engine mount — what it does and when to replace it

Engine mounts are absolutely used on the 1999 Toyota Crown. Toyota’s Electronic Parts Catalogue (EPC) for the S170 series (models such as JZS171/JZS173/JZS175 and UZS171) lists engine mounting insulator sub-assemblies and brackets, and Toyota’s TIS repair manuals include removal/installation procedures and torque specs for these mounts. So yes — the 1999 Crown is fitted with engine mounts from factory.

On a 1999 Crown, the engine mounts (often hydraulic rubber insulators) keep the straight-six or V8 sitting at the right height and angle, soaking up vibration so the cabin stays quiet and comfortable. They also control how much the engine twists on its axis when you punch the throttle, braking or shifting. That stability protects hoses, the exhaust, the shroud under the bonnet, and keeps the driveline geometry sweet so gear changes feel tidy.

As part of regular servicing, it pays to have the mounts inspected for perishing, cracking, oil swelling, or hydraulic fluid seepage. Common tell-tales include a buzzy idle (worse in Drive with the A/C on), a thump on take-off or when selecting gear, more movement under the bonnet than normal, and odd vibrations through the steering wheel or floor. In NZ and Australia, many workshops will cast an eye over them every 20,000–30,000 km, by 150,000–200,000 km they’re often due, especially if the car’s had oil leaks or lots of stop–start use.

Replacement isn’t a big drama for a competent tech, but it does need the right approach:

• Support the engine properly (crossbar support or hoist) before loosening mounts.
• Loosen, align, then final-torque the mount fasteners at normal ride height to prevent preload and new vibrations.
• Consider doing both left and right mounts together, and check the transmission mount while you’re there.
• Use quality parts — genuine or reputable aftermarket — and fresh hardware if Toyota specifies it.

Owners who keep mounts healthy get the best of the Crown’s smooth, quiet character. If there’s a mild vibration that wasn’t there before, or the fan shroud starts kissing the blades over bumps, it’s time to book it in. A tidy set of mounts will make the big Toyota feel new again.

How long do engine mounts last on a 1999 Toyota Crown?

With gentle driving and no oil leaks, many last 8–12 years or 120,000–200,000 km. Heat, age, and fluid contamination shorten their life, so older Crowns often benefit from fresh mounts even if they haven’t done huge kilometres.

What are the symptoms of worn mounts on a Crown?

Shakier idle in Drive, a clunk on take-off or shifts, excessive engine rock, or visible cracks/seepage on the mounts. You might also notice the exhaust knocking or more vibration through the seat and dash.

Is it OK to keep driving with tired engine mounts?

For a short period, usually yes, but it’s not ideal. Worn mounts can stress hoses, the exhaust, and other brackets, and they make the car feel rough. Sort them sooner rather than later to protect the rest of the driveline.