|02-20-2005, 12:39 AM|
Join Date: Feb 2005
T4R V8 reliability
I've read some stuff on this forum about how the V8 in the 4Runner isn't as reliable as the V6. Why is this? I hope I didn't make a bad purchase by going with my 05 SR5 4x4 V8.
|02-20-2005, 12:48 AM|
Join Date: Sep 2004
Location: Seattle Area
That's the first I've heard of it.
|02-20-2005, 12:50 AM|
Join Date: Sep 2003
Location: So. CA
That's the first I've heard of it too.
|02-20-2005, 12:52 AM|
Join Date: Jan 2004
Location: New Jersey
I don't remember reading anything about the V8 being unreliable. There was discussion about how Consumer Reports gave the V6 a bad reliability rating only because of a fuel system recall. To my understanding, that has since been corrected. None of the 4Runner engines are unreliable. The V8 is especially bulletproof and extremely reliable. They even use the same engine in the Lexus GX470. I don't think you should have any second thoughts about buying a V8 4Runner. I have 18,500 miles on my V8 and it has given me no problems at all. I just give it the routine oil changes and this thing runs amazing.
|02-20-2005, 12:55 AM|
Join Date: Nov 2002
Location: Eastern USA
He/she probably means the thread where a few people think that the new '05 VVTi-V8 will be less reliable due to increase technology in the engine.
|02-20-2005, 01:08 AM|
Join Date: Feb 2005
toyo v8 are tanks. the only bad thing i could say about them is why ....why did you put the starter in the valley of the heads.
|02-20-2005, 03:01 AM|
Join Date: Dec 2004
Endless engine discussions
But not much discussion of the other big lump of metal, fluid, and technology that sits right behind it.
|02-20-2005, 03:14 AM|
Join Date: Jul 2004
Location: New York
Yeah, I've also heard that the V8 engine is very unreliable for a Toyota engine.
I think it is mostly due to lightweight aluminum casting used throughout the block and heads.
Also, the timing belt, which is prone to breakage, should be replaced by a chain.
THe silica-filled intake valves have been known to fail under high-rpm operation.
If I were you, I'd trade in that V8 before it's too late and replace it with a V6 version.
BTW, I'm just kiddingI'm sure the V8 is just as reliable as any other Toyota engine these days. If you drive a Toyota, reliability should be the last thing you worry about.
|02-20-2005, 03:47 AM|
Join Date: Dec 2004
The V8's don't have a timing belt.. it has a timing chain.
As far as reliability.... the V8 has proven itself over and over again. Why do you think its in half of the toyota and lexus suvs? because its proven to be reliable. I would say the V8s are more reliable than the V6s, but we have one of each.
|02-20-2005, 04:29 AM|
Join Date: Sep 2003
Location: So. CA
Nope, V8's have timing belts.
|02-20-2005, 04:38 AM|
Join Date: Jul 2004
Location: New York
Belt or chain... who cares? Didn't you see where I said I was kidding? I just made all that up as a joke anyway.
Either way, it's a Toyota engine, so it will be one of the most reliable vehicles available.
|02-20-2005, 06:50 AM|
Join Date: Apr 2004
I think he is talkin about the piston slap he will get if he leaves it out in the cold. I would get rid of it before it starts!!! Plus resale on the V8's is really bad because of the timing belt and piston slap.
|02-20-2005, 08:01 AM|
Join Date: Dec 2002
My engines running great, it did not hold to well after the rebuild but they decided to replace it and my 2nd engine runs better then my 1st
|02-20-2005, 01:30 PM|
Join Date: Dec 2004
when you joke.. you need a .... or a :P ...
Sorry.. I keep getting our two T4R mixed up. V6=chain, V8=belt
|02-20-2005, 11:59 PM|
Join Date: Jul 2004
Location: New York
There is a in my post.... you've just gotta read it first
|Rate This Thread|
The 4Runner is among the best off-road-ready SUVs in this price range. Despite retaining a body-on-frame construction, the 4Runner rides better than some car-based SUVs. While its cabin is very roomy and quiet, the 4Runner doesn't provide the nimble, carlike handling of car-based models. Still, it is sound and secure. Side- and curtain-airbags are standard.
There are 2 recalls on this vehicle. Learn More.
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2003-2009 Toyota 4Runner: gas mileage, model years to avoid, problems to watch out for, maintenance
March 15, 2020The 4Runner is one of the best truck-based SUVs. It rides comfortably on the road and is capable off the road. The 4-th generation 2003-2009 4Runner comes with rear- or four-wheel drive and offers a standard 236-hp 4.0L V6 or an optional 260-hp 4.7L V8.
Gas mileage:The EPA has rated the 2007-2009 V6 four-wheel drive 4Runner at 16/20 mpg city/highway with the estimated range of 391 miles on a tank of gas. The V8 is thirstier; the EPA-estimated mileage for the 2008-2009 V8 four-wheel drive 4Runner is 14/17 mpg or 345 miles on one tank.
2007-2009 4Runner Ground clearance and towing capacity:The 4x2 models offer 8.7 inches, while the 4x4 models have 9.1 inches of ground clearance. Towing capacity is rated at 5,000 lb. for the V6 4Runner, 7,000 lb. for the 4x4 V8 4Runner and 7,300 lb. for the 4x2 V8 trim levels.
Model years to avoid:The NHTSA website shows a large number of complaints about the 2003-2005 model years. The most troublesome concerns are about the rust damage of the frame. As of March 2020, the number of complaints for the 2006-2009 4Runner is much smaller.
Does the 2003-2009 4Runner have a timing belt or timing chain?The 4.0L V6 1GR-FE engine has a timing chainthat doesn't need to be replaced in regular intervals and can outlast the engine with proper maintenance. That said, a timing chain (plus the tensioner and other hardware) might need to be replaced at a much higher mileage if it's stretched.
The 4.7L V8 2UZ-FE engine has a timing beltthat must be replaced every 90,000 miles.
What to watch out for when buying a used 4-th gen. Toyota 4Runner?When taking the vehicle for a pre-purchase inspection, ask a mechanic to check the frame, crossmembers and undercarriage components for rust damage. Some rust damage areas could be hidden behind the skid plates. Trucks from the region with high road salt usage or high-humidity are more likely to have rust. If the frame shows considerable rust damage, the vehicle should be avoided. Other underneath items that are known to go bad include lower ball joints, brake calipers (they tend to stick), CV axleboots, spare tire lowering mechanism and the X-REAS suspension. The X-REAS suspension could be troublesome at higher mileage, we recommend looking for the 4Runner without this option. A loud ticking noise from the 4.7L V8 when it's started cold might be an indication of a leaking/cracked exhaust manifold which will require expensive repairs. A low coolant level or white smoke from the exhaust could be signs of a blown head gasket, which is one of the known problems in the early 4.0L V6 engines at higher mileage. Early signs of a leaking head gasket in the 1GR-FE engine include occasional misfiring (often, cylinder 6) and loss of coolant. Your mechanic can do the cooling system pressure test or check for presence of exhaust gases in the cooling system to check for a leaking head gasket. It might also be a good idea to scan the engine computer (ECM) for previously stored trouble codes (e.g. code P0306 for cylinder 6 misfire). Generally, if there is a smoke from the exhaust when the engine is started, the vehicle should be avoided. A low oil level could also indicate that the engine consumes oil. All 4WD system functions must be tested, as the 4WD actuator tends to stick if not used for a long time. Watch out for any of the warning lights staying on with the engine running.
Spark plugs:Spark plugs (conventional, non-platinum) must be replaced every 30,000 miles. The Iridium−tipped spark plugsare replaced every 120,000 miles. You can find the recommended spark plug type in the owner's manual for your truck that you can download at the U.S. Toyota Ownerswebsite. The owner's manual for the U.S. 2008 4Runner, for example, indicates that the 4.7L V8 is fitted with iridium−tipped spark plugs.
4WD maintenance:The 4WD 4Runner has a transfer case and front and rear differentials. The oil in all three units must be checked regularly and changed if dirty. The drive (propeller) shaft needs to be greased at least at every other service. If the grease dries out, it may cause a "clunk" felt in the driveline. Other parts of the 4WD system, including front CV axles, need to be inspected periodically for leaks and other problems. The transfer case actuator tends to stick if not used for a long time. Rustproofing:If the frame is still in good shape, rustproofing can help preserve it.
Engine oil capacity:
1GR−FE V6 engine (with filter): 5.5 qt (5.2 liters)
2UZ−FE V8 engine (with filter): 6.5 qt (6.2 liters).
One of the common problems with the Toyota 4Runner is a failed A/F (air-fuel ratio) sensor also known as a front (upstream) O2 sensor.
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Currently, Toyota only offers the 4Runner with a V6. But the 4th-gen 2003-2009 Toyota 4Runner also offered a V8. The 4th-gen Toyota 4Runner has had some notable issues, rusting frames being particularly egregious, but the later 2007-2009 models are just as off-road-capable as new 4Runners. YouTube team Throttle House called the 4th-gen 4Runner’s V8 one of Toyota’s most reliable engines—but is it really?
Why the 2003-2009 Toyota 4Runner V8 can be problematic
The 4th-gen 4Runner’s 4.7-liter V8 wasn’t a model-exclusive engine. According to Canadian Gearhead, the engine was also used in the Tundra, Land Cruiser, and Sequoia. And while it does a fairly sterling reputation, its one fault, as some Expedition Portal forum users put it, is cracking its exhaust manifold.
The issue, according to Canadian Gearhead and CarSpec, is with the 4.7-liter V8’s catalytic converters. Catalytic converters need to be warmed up properly in order to lower emissions. So, as Toyota 4Runner owner forum users explain, to help the V8 comply with emissions standards during cold starts, Toyota incorporated a secondary converter into the exhaust manifold.
However, according to Tundra World and Expedition Portal forum users, this design forced engineers to make the metal there thin. Thus, as the metal heats and cools, it expands and shrinks, eventually cracking. This causes a leak and catalytic converter failure, causing, as many forum users and CarComplaints reports have cited, a horrible sulfur smell.
How often does this happen?
Although this doesn’t happen to every single Toyota 4Runner with a V8, Consumer Reports claimed this was a fairly common problem. Canadian Gearhead even said that there are “two different types of Toyota 4.7s: the ones that already have cracked manifolds, and the ones that are about to have cracked manifolds.” One owner reporting to CR even went so far as to call it a defect.
CarComplaints notes that the issue was enough of a problem for Toyota to issue an official technical service bulletin. The Toyota 4Runner’s V8 was enough of a hassle that the automaker stopped offering it in the 5th-gen SUV. And none of the other trucks or SUVs that had the 4.7-liter V8 offer it in the US today.
Can the Toyota 4Runner’s V8 problems be fixed?
Part of the Toyota TSBs appears to have been, according to Toyota 4Runner owner forum users, simply replacing the cracked manifolds with OEM ones. However, while the parts did fit, they had the same design flaw. Eventually, they’d crack again. This is also the most expensive solution, as many Toyota 4Runners with V8s are out of warranty.
It is possible for a skilled mechanic to simply weld the crack shut. However, it appears that this is, at best, a temporary fix. The weld fixes the crack, but it doesn’t fix the problem with the metal itself.
There is another solution, though. It is possible to fit aftermarket exhaust manifolds/headers to the 4.7-liter V8. Commonly-recommended brands are Doug Thorley, Pacesetter, and Dorman. Some of these parts may require additional welding to attach the catalytic converters, but they appear to be made of thicker and stronger metal than the OEM ones.
However, these parts are not 50-state emissions-legal. Especially if you live in California, this solution may not be feasible. That being said, it does appear that Dorman, at least, offers CARB-compliant aftermarket Toyota 4Runner V8 exhaust manifolds.
One additional caveat about aftermarket exhaust manifolds: according to Expedition Portal owner forum users, Toyota modified the manifold design for the 2005 and 2006 model years. Make sure, if you’re going to install an aftermarket unit, that it will fit your engine.
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Reliability 4runner 2004 toyota v8
Long-Term Wrap-Up: 2004 Toyota 4Runner
All good things must come to an end.Toyota 4Runner Full Overview
It was with great reluctance that we handed back the keys of our beloved Toyota 4Runner Limited. Everyone on staff voiced his desire to extend our long-term tester, but, as the saying goes, all good things must come to an end.
With every drive of this versatile SUV, our editors found more things to write in the logbook. Almost all the comments were positive, with the exception of notes from more than a few people about a couple of idiosyncrasies.
Overall fit and finish and quality of interior materials was impressive. As one editor put it: "When did the 4Runner become a luxury SUV? This Limited is at or near $40K, and the interior is better than most of the hotel rooms I stay in. Flexibility of the second- and third-row seats is amazing, and console, dash, and IP all use first-rate materials."
Surprisingly, with all this comfort, the new-for-2004 4Runner didn't give up any of the previous-generation's off-road capabilities. In the time we had it, our 4Runner saw more dirt, mud, rocks, river beds, and sand dunes than many SUVs would see in a lifetime.
The long-termer had those little things that helped make our lives easier, like its power rear window, a feature formerly common in most domestic wagons and nearly exclusive to Toyota SUVs today. On road trips where photos and video were necessary, it was invaluable.
Another item that made itself useful was the 115-volt A/C power port inside the center console. This was handy on the road for recharging batteries for cameras, radios, and even computers. The ability to keep these electronic devices functional without needing to stop was a great convenience and terrific timesaver. On the downside, though, there was only one 12-volt outlet in the front, and without the 4Runner having a multisocket adapter, we couldn't have a cell-phone and radar detector plugged in at the same time.
Another faulty issue we found was the high-floor/low-seat cushion combination in front, which forces a driver's knees to be too high, making one feel like they're sitting on a futon. Also, the runningboards seemed only good for dirtying pant legs and finding hidden rocks while off-roading.
The 4Runner received a midyear update for 2005. These changes include a new color (Salsa Red Pearl), new rear spoiler shape, and new trim levels. The SR5 gets a chrome grille, color-keyed front and rear bumper, black runningboards, and optional roofrack. The Limited also gets color-keyed front and rear bumpers, black lighted runningboards, and black roofrack. 4Runner interiors receive advanced driver and passenger airbags and an updated navigation system. Mechanical upgrades include a new five-speed automatic transmission; a new V-8 with VVT-i producing 270 horsepower and 330 pound-feet of torque; and an automatic limited-slip differential, added to the vehicle stability control system.
As far as issues or problems, the windshield cracked twice, costing a total of $1361.60 for both replacements. The only other trips to the dealer were as part of the suggested maintenance schedule.
Toyota has managed to move into the luxury-SUV market without compromises. The tradition of off-road prowess continues to thrive, with the welcome additions of an ultra-plush interior and seamlessly smooth ride. Couple that with a variety of engine and trim options, and you have a vehicle almost anyone can afford, and everyone will love. Who needs a Land Cruiser?
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