Not sure if anyone has posted this one yet
3UR teardown
- Thread starter tbisaacs
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2001LC
SILVER Star
This is good as any thread, I suppose. To taking about the 3UR-fe. I'm hunting for: The Good, The Bad and The Ugly > which I'll post more of here. I encourage all to add to.
In above video tear down. We see a broken cam bolt out of a Tundra w/287K miles. A USA manufactured engine. Why did the bolt break and are we seeing more of same?
What are, the failure points we're seeing in the USA or Japanese manufactured 5.7L 3UR. That result. in blown engine?
Are the 3UR built in Japan, better or worst?
In the 4.7L 2UZ-fe, it was a USA manufactures, that we know of two of them reached 1 million miles. The first was run on dinno with score 98 out of 100. The engineers that tore it down. Said nothing was wrong with it. We known, the Japanese manufactures 4.7L 2UZ to be even better than the USA made. In that USA 4.7L 2UZ-fe was known, for busting rod and the Toyota tick (piston slap).
But nothing is perfect and this engine too. The 3UR-FE has a problem with coking of the piston oil rings which caused high oil consumption. After that, the oil consumption increases over time. To avoid this problem, use only the recommended high-quality oil and watch the oil level. The 3UR-FE crankcase ventilation system sensor fails hugely often, and electronic throttle system ETCS-i is not as reliable as it should be. The problem with water pump is also found in this engine. Like other UR engines, the 3UR-FE has a leaking water pump with short life about 60,000 miles (100,000 km).
"
In above video tear down. We see a broken cam bolt out of a Tundra w/287K miles. A USA manufactured engine. Why did the bolt break and are we seeing more of same?
What are, the failure points we're seeing in the USA or Japanese manufactured 5.7L 3UR. That result. in blown engine?
Are the 3UR built in Japan, better or worst?
In the 4.7L 2UZ-fe, it was a USA manufactures, that we know of two of them reached 1 million miles. The first was run on dinno with score 98 out of 100. The engineers that tore it down. Said nothing was wrong with it. We known, the Japanese manufactures 4.7L 2UZ to be even better than the USA made. In that USA 4.7L 2UZ-fe was known, for busting rod and the Toyota tick (piston slap).
From articles linked below:
Toyota 5.7 V8 3UR-FE Engine Problems and Reliability
The 3UR-FE is the most reliable and durable engine for all UR engine family. The Toyota made over 1.3 million kilometers of durability testing for this engine. In reality, the 3UR-Fe can run more than 400,000 miles (650,000 km) smoothly with regular maintenance with using high-quality fuel and oil.But nothing is perfect and this engine too. The 3UR-FE has a problem with coking of the piston oil rings which caused high oil consumption. After that, the oil consumption increases over time. To avoid this problem, use only the recommended high-quality oil and watch the oil level. The 3UR-FE crankcase ventilation system sensor fails hugely often, and electronic throttle system ETCS-i is not as reliable as it should be. The problem with water pump is also found in this engine. Like other UR engines, the 3UR-FE has a leaking water pump with short life about 60,000 miles (100,000 km).
3UR-FE 5.7L Engine - In-Depth Look at Design and Reliability
What is the 3UR-FE 5.7L Engine? Is it good or bad? Read about Toyota 3UR-FE 5.7L Engine design and features, its the most common problems and relaibility.
www.motorreviewer.com
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Are you saying we should PM replace the water pump at 60k?This is good as any thread, I suppose. To taking about the 3UR-fe. I'm hunting for: The Good, The Bad and The Ugly > which I'll post more of here. I encourage all to add to.
In above video tear down. We see a broken cam bolt out of a Tundra w/287K miles. A USA manufactured engine. Why did the bolt break and are we seeing more of same?
What are, the failure points we're seeing in the USA or Japanese manufactured 5.7L 3UR. That result. in blown engine?
Are the 3UR built in Japan, better or worst?
In the 4.7L 2UZ-fe, it was a USA manufactures, that we know of two of them reached 1 million miles. The first was run on dinno with score 98 out of 100. The engineers that tore it down. Said nothing was wrong with it. We known, the Japanese manufactures 4.7L 2UZ to be even better than the USA made. In that USA 4.7L 2UZ-fe was known, for busting rod and the Toyota tick (piston slap).
Toyota 5.7 V8 3UR-FE Engine Problems and Reliability
The 3UR-FE is the most reliable and durable engine for all UR engine family. The Toyota made over 1.3 million kilometers of durability testing for this engine. In reality, the 3UR-Fe can run more than 400,000 miles (650,000 km) smoothly with regular maintenance with using high-quality fuel and oil.
But nothing is perfect and this engine too. The 3UR-FE has a problem with coking of the piston oil rings which caused high oil consumption. After that, the oil consumption increases over time. To avoid this problem, use only the recommended high-quality oil and watch the oil level. The 3UR-FE crankcase ventilation system sensor fails hugely often, and electronic throttle system ETCS-i is not as reliable as it should be. The problem with water pump is also found in this engine. Like other UR engines, the 3UR-FE has a leaking water pump with short life about 60,000 miles (100,000 km).
3UR-FE 5.7L Engine - In-Depth Look at Design and Reliability
What is the 3UR-FE 5.7L Engine? Is it good or bad? Read about Toyota 3UR-FE 5.7L Engine design and features, its the most common problems and relaibility.www.motorreviewer.com
2001LC
SILVER Star
No. That last bit, is repost from article linked below it.
2001LC
SILVER Star
Going deep! Common 3UR-fe issues:
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2001LC
SILVER Star
Head Gasket?
forum.ih8mud.com
Taken from above thread:
"I hope everyone is having a nice Labor Day weekend! Just wanted to update - I got my Land Cruiser back about a week ago. Runs great. The extended warranty covered a little more than half of the expense. They would only (seemingly reluctantly) cover the minimum repair (one head gasket, no machine shop work), so I covered the balance. At least the warranty coverage softened the blow. The warranty company sent an inspector to the dealership twice to confirm the diagnosis, and to determine if there was any evidence of low coolant, leaks, overheating or misuse, etc.. The warranty company stated clearly that if any evidence was found the warranty company would not cover anything. No evidence was found, the head with the blown gasket was perfectly straight, no warping. Both head gaskets were replaced, and both heads sent to the machine shop. Repairs were done at Mossy Toyota in San Diego. Their service team was good to work with. No definitive explanation of why this happened. Possibly a manufacturing defect, or assembly error on the gasket that lead to premature failure. I'm glad to have my truck back."
Blown Head Gasket?
forum.ih8mud.com
"I hope everyone is having a nice Labor Day weekend! Just wanted to update - I got my Land Cruiser back about a week ago. Runs great. The extended warranty covered a little more than half of the expense. They would only (seemingly reluctantly) cover the minimum repair (one head gasket, no machine shop work), so I covered the balance. At least the warranty coverage softened the blow. The warranty company sent an inspector to the dealership twice to confirm the diagnosis, and to determine if there was any evidence of low coolant, leaks, overheating or misuse, etc.. The warranty company stated clearly that if any evidence was found the warranty company would not cover anything. No evidence was found, the head with the blown gasket was perfectly straight, no warping. Both head gaskets were replaced, and both heads sent to the machine shop. Repairs were done at Mossy Toyota in San Diego. Their service team was good to work with. No definitive explanation of why this happened. Possibly a manufacturing defect, or assembly error on the gasket that lead to premature failure. I'm glad to have my truck back."
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2001LC
SILVER Star
Here's 1 Million mile 5.7L 3UR.
www.tundras.com
Victor Sheppard approaching 1 million tundra (Again!)
This time, a 2014 with the 5.7. https://pickuptrucktalk.com/2023/12/another-million-mile-toyota-tundra-sheppard-closes-in-again/
www.tundras.com
bloc
SILVER Star
With the not-uncommon timing chain slap issues I personally suspect that was a factor in the one with the broken cam gear bolt.
Either way, that failure mode appears to be extremely rare.
Either way, that failure mode appears to be extremely rare.
If I can get 300k out of a 3UR, I would chalk that up to be a success. Anything more than that, I would be ready for some one-off random devastating event. It’s just the nature of the beast when you’re talking about aluminum engines. That’s much better than the 100-200k max you’ll get out of Toyota’s new high stressed engines that cost 30k+ to replace just the short block.
There are plenty of cases where these 3UR engines do go 1m+ miles with regular fluid maintenance, but it’s a gamble getting there.
I would not be opening up a factory sealed 3UR and doing preventative maintenance to get there. You’ll likely cause more damage than leaving it sealed up and rolling the dice.
There are plenty of cases where these 3UR engines do go 1m+ miles with regular fluid maintenance, but it’s a gamble getting there.
I would not be opening up a factory sealed 3UR and doing preventative maintenance to get there. You’ll likely cause more damage than leaving it sealed up and rolling the dice.
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