![]() ![]() The tensioner.unless it is leaking.I can't see it going bad. CHINESE CRAP built to "OEM SPECS" is a damn lie. Pulleys should be all OEM or OEM manufacturers. ![]() Well worth the $150.ĭemand an Aisin water pump and Japanese parts. If the tranny cooler in the radiator goes.you'll need a new transmission. It is a $150 part from Advance for a lifetime warranty. The belt can go.and no damage to the pistons/valves/internals.Īgreed on replacing the radiator. You have a Timing Belt and old-school drive belts for the engine accessories. Those with more 4Runner experience can chime in and fill in the blanks and correct me. Unless the pump is leaking or performing poorly, I'd leave it alone and just mess with the serpentine. I found cussing helped significantly because there's not a lot of room to work in there.Īs for replacing the water pump and the serpentine at the same time. I helped her replace the serpentine, so I do know it's something you can do if you're handy. It shredded while she was driving, and messed up the power steering pump. I have a neighbor up the street that took her 4Runner in for service to a shade tree mechanic for an alternator job and they didn't seat the serpentine fully on the pulley. I don't know the recommend schedule to change the serpentine belt, but they're pretty inexpensive and without the history it might be a good comfort to know you have a new one. Google what to look for and you'll see pictures, which is better than writing it down here. Nonetheless, is there a particular problem you're having? You can check the serpentine belt easily enough just looking at it. And the battery won't be charging with a broken belt, so you might get to your destination and have a dead battery. If it breaks, you lose the use of that equipment under the hood, with the water pump being the one that will strand you from overheating. The serpentine takes power from the engine to drive other equipment, like the water pump, steering pump, alternator, and AC. The serpentine belt you see on the front of the engine is a different animal. Again, I don't know Toyota's that well yet, so someone else will need to speak up on timing belts. Timing belts generally just fail, so keeping a service schedule on the timing belt is a good idea. Of course, I'm assuming you have a timing chain and not a timing belt. Ok under load, not so good while trying to hold a speed. That's the symptom of a loose, old, stretched timing chain. If I punched it, the chain took up slack and ran great. It ran fine while accelerating, but when I reached speed and maintained it, the engine would buck and sputter. I had an old (1989) Dodge truck that would not hold engine timing. I'm brand new to 4Runners (2020 ORP)a and coming from a 2004 Jeep Wrangler Unlimited with 237000 miles on it, so I'll limit my input to general vehicle maintenance.įirst, if you have a loose/worn timing chain you'll generally know it by engine performance. ![]()
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