If the 1ZZ-FE is routinely maintained and not abused, it should never cause any engine problems in the 1998-2002 Toyota Corolla. With that in mind, the most common problems that you can be faced with include high oil consumption and timing-chain tensioner problems, this item leaking oil being the most common.
The reason why the 1ZZ-FE suffers from high oil consumption is due to a series of design flaws. The unit uses small pistons, which are compensated for by upsized rings. As the rings wear, excess oil starts to seep through. This was addressed by the brand with a six-year/100,000-mile warranty until the design was improved in 2005. This won't result in significant damage to the engine initially, but if you let the rings wear too much, you'll begin to lose compression. You'll know that your rings are starting to wear if you find that the engine starts consuming a quart of oil every 1,000 miles. If left unchecked for too long, the Corolla will develop problems such as a misfire, smoke from the exhaust, fouled spark plugs, and poor engine performance. Unfortunately, there is not much that you can do to resolve this issue but if it occurs, Toyota's rebuild kit permanently fixes the problem. This is a costly procedure, though.
Timing-chain tensioner oil leaks are due to a worn O-ring which is something you can expect every engine to struggle with over time as it ages and the seal starts to crack. This is a relatively small issue that is quick and affordable to repair. You'll know your ring has started to wear when you start to see oil seeping from the tensioner housing. Burning-oil smells and smoke from the engine bay may also be noticed.
The auxiliary drive belt's tensioner is known to be problematic after some time. This could be due to a worn tensioner or pulley, both of which are relatively inexpensive to fix. You'll notice that this part is on its way out when it makes a rattling or squeaking noise. This will be louder under acceleration.
General wear and tear will be encountered with the 1ZZ-FE. Rattling and vibrations are standard characteristics, but if it gets too violent, you may need to look at the rear engine mount. Rough idling is likely due to a dirty throttle-body unit or idle-air control-valve problem, which can just be cleaned out rather than replaced. This fault could bring up the P0120 or P0221 code.
After 100,000 miles, you may also encounter cold start/starter/starting/ignition problems. You'll know this is the case if you turn the key but the starter doesn't swing. Usually, this is due to a faulty starter solenoid, but in some cases, you will need to replace the entire starter.
1 zz-fe plasma-sprayed袖子,这意味着that it cannot be rebuilt by boring the sleeves if it suffers sleeve damage. It is also susceptible to warping if it overheats, so make sure that your engine and coolant levels are always perfect. Low coolant levels or cooling-system problems will bring up the P0125, P0115, or P0128 fault codes.
Mileage:Although the warranty covers the motor for 100,000 miles, you may only notice wearing piston rings closer to 150,000 miles. Timing-chain tensioner oil leaks are likely to start occurring after 150,000 miles. The accessory belt drive tensioner may start to wear after 100,000 miles. Starters may start to go faulty after 100,000 miles.
Cost:Rebuild kits for the 1ZZ-FE may cost $1,000, but if you factor in labor, you could be looking at spending over $1,500. Including the replacement o-rings, resolving the timing chain tensioner oil leaks may cost up to $150. Restoring the accessory belt drive tensioner may cost in the region of $200. Cleaning out the throttle body and idle air control valve should not cost more than $325 if you take it to a private workshop. Installing a new engine mount should cost $400. A new starter, including the cost of fitment, may amount to $550.
How to spot:Wearing piston rings will increase oil consumption. Timing-chain tensioner leaks will lead to spots of oil dripping onto the ground while parked. You may also notice a smell indicating a burning-oil problem or smoke from the engine compartment. A rattling or tapping noise from the engine that becomes more evident as you accelerate is likely due to a weakening accessory drive belt. Harsh engine vibrations mean that you have an engine-mount problem that will require the part to be replaced. A dirty throttle body unit and idle air control valve will result in rough idling. A failure to start may mean that your starter has worn out.