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Descrição do Produto: Dorman 917-251 Engine Variable Valve Timing (VVT) Sprocket
O Dorman 917-251 Engine Variable Valve Timing (VVT) Sprocket é a solução ideal para quem busca um componente de substituição de alta qualidade para modelos selecionados da Honda. Este sprocket de VVT é um substituto direto, projetado para se encaixar e funcionar como o sprocket original, garantindo que o desempenho do motor permaneça em seu nível máximo. Fabricado em aço durável, este componente é usinado com precisão, assegurando uma performance confiável e duradoura.
Com 100% de novas peças, o sprocket de VVT Dorman não é um componente remanufaturado, o que significa que você pode confiar em sua integridade e eficiência. Cada aplicação específica do veículo passou por testes de validação rigorosos, garantindo que você receba um produto de qualidade superior. Para garantir que este sprocket se encaixe perfeitamente em seu veículo, basta inserir a marca, modelo e nível de acabamento no nosso ferramenta de compatibilidade.
Instruções de Uso:
Para instalar o Dorman 917-251 VVT Sprocket, comece desconectando a bateria do veículo para evitar qualquer curto-circuito. Remova a tampa do motor e, em seguida, o componente antigo do VVT sprocket. Certifique-se de que a área de instalação esteja limpa e livre de detritos. Posicione o novo sprocket Dorman no lugar do antigo, alinhando corretamente os pinos de fixação. Aperte os parafusos de acordo com as especificações do fabricante e recoloque a tampa do motor. Por fim, reconecte a bateria e faça um teste de funcionamento do motor para garantir que tudo esteja operando corretamente.
Características do Produto:
– Substituição Direta: O Dorman 917-251 é um sprocket de VVT que se encaixa perfeitamente em modelos selecionados da Honda, mantendo a performance original.
– Construção Durável: Fabricado em aço de alta qualidade, este sprocket é projetado para resistir ao desgaste e à corrosão, garantindo uma longa vida útil.
– 100% Novo: Diferente de peças remanufaturadas, este sprocket é completamente novo, oferecendo confiabilidade e eficiência.
– Validação de Qualidade: Cada aplicação do produto foi testada para assegurar que atende aos padrões de qualidade exigidos.
– Compatibilidade Garantida: Utilize a ferramenta de compatibilidade para verificar se o sprocket é adequado para seu veículo específico.
Perguntas Frequentes (FAQ):
Pergunta: O Dorman 917-251 é compatível com meu modelo de Honda?
Resposta: Para garantir a compatibilidade, utilize a ferramenta de compatibilidade inserindo a marca, modelo e nível de acabamento do seu veículo.
Pergunta: Este sprocket é fácil de instalar?
Resposta: Sim, a instalação é direta, mas recomenda-se seguir as instruções de uso e, se necessário, consultar um mecânico profissional.
Pergunta: O que diferencia o Dorman 917-251 de outros sprockets no mercado?
Resposta: O Dorman 917-251 é 100% novo, fabricado em aço durável e passou por testes de validação específicos, garantindo qualidade e desempenho superiores.
Pergunta: Qual é a garantia deste produto?
Resposta: O Dorman oferece uma garantia limitada que cobre defeitos de fabricação, proporcionando segurança na sua compra.
Pergunta: Posso usar este sprocket em um motor modificado?
Resposta: É recomendável consultar um especialista em motores modificados para garantir que o sprocket Dorman 917-251 atenda às necessidades específicas do seu motor.
Michael K. Stewart –
This part was an exact replacement for my Honda Accord year 2009. After following some YouTube videos on how to replace the gear I went at it. It took me only about five hours in total. This immediately took care of the cold start problem where the valves with clatter very loudly for the first few seconds of the engine running. I’m very happy with the quality of the part. I had no problems installing the gear. The doorman products tend to be higher quality than some of the cheaper Chinese knock off’s. Highly recommend.
TrashCanCass –
I purchased in July but didn’t install until sometime in August, I’ve waited to post review to see if there would be immediate problems since a few reviews said their rattling noise soon returned. As of 10/10/23 all is GOOD. If you’re a shade-tree DYI mechanic such as I be sure to look at more than one video on how to do the job correctly there are some good ones and some bad ones. Good Luck!!
UPDATE: RATTLE RETURNED IN NOVEMBER…….STRONGLY SUGGEST SPENDING EXTRA FOR OEM. BE BLESSED.
Wizbang72 –
I’m a professional technician of 25 years and rarely do I recommend an aftermarket part for this kind of application but so far so good. It was roughly a third of what the factory part costs. I have to warn DIY types that this is not the easiest install. If you accidentally click it into locked position you will have to completely remove the camshaft to unlock it and properly tighten it. Ask me how I know. Lol
Rich T –
Will update as the miles accumulate. If I get the 75k I got from the factory, I’ll call it a win despite being irritated there really is no solution to imminent failure.
Installation notes: I really blew here. When rotating it to drop on the cam locator pin, it felt like it dropped into place BUT IT DID NOT. When I torqued the bolt down it pressed the locator pin all the way into the cam with no way to get it out. Seems like this should have been a blind hole, but it is not! Plenty of room to sink the pin in flush. Too hard to drill, in fact a center punch wouldn’t even scratch it. Hoped a local machine shop could get it out, but several of them would not guarantee and the others were too busy. Local speed shop said they could, but it would take 3 weeks. I could get a punch on the back of the pin at a 90 degree through an oil hole, but that only bent/broke punches. Heat as hot as I could get it without getting it red hot and warping also resulted in nothing but bent/broke punches. On to search for replacement cam (Ugh!) …. $830 from the dealer, no dealer had one in stock in a 150mi radius, except for one but it was in stock for a car in for service. Found one on the east coast, Majestic Honda in Rhode Island, approx $600 shipped. Took 5 days to receive in Wisconsin. EXPENSIVE mistake!!! Be sure to print out Honda TSB 16-012 and read the steps out loud! Double, triple check your work before torqueing! My foolish mistake aside, with the TSB on hand it was actually a pretty easy job and took about 2.5hrs. It did not require any special tools, but you will need torque wrenches for at very least the VTEC actuator bolt (83 ft/lbs) and the cam caps (16 ft/lbs or 192 in/lbs). 18″ of 1/2″ extensions is helpful for clearing the fender when turning the crank over by hand. A .050″ Allen wrench is perfect for holding the chain tensioner in the slack position. The TSB does not mention it, but I removed the spark plugs as well so I wasn’t fighting compression when rotating by hand. No issue with reusing valve cover gasket, but if yours leaks now is obviously a good time to replace. You will need some gasket maker on hand for the chain tensioner cover as there was no gasket from the factory. I used Permatex MotoSeal 1 Ultimate. Be sure and check for a stretched timing chain while you are in there, if the lines on the cam gears point right at each other while the TDC mark on the crank pulley is lined up you should be good (all marks noted in the TSB). If you can’t get them all lined up, consider replacement. Timing chain set is about $400. Finally – if you have never done this particular job before, do yourself a favor and read the TSB through before starting, and watch a few YouTube videos – there are plenty of them. Had I done that I may have avoided my foolish and very costly mistake.
***UPDATE*** 09.29.2021 – Over 30k miles put on this so far. ZERO issues. Good chance the car will be sold/traded before my 75k expectation comes up, but I will certainly update if it fails before I get rid of it…..
Angeline Robertson –
Fixed the rattle on startup for a 2014 honda CRV.
John K Courage –
The replacement of this actuator is not for the faint of heart and requires a host of other tools and parts to make the swap successful.
The part itself seems well made and installed smoothly. The included bolt was identical to the original one that came out of the car.
Note: Don’t waste your time buying a “Used” one.
These come from the factory unlocked and must remain so until you’ve torqued down the actuator to the camshaft. I bought a used one in a lame attempt to save some money and, predictably, a locked one arrived at my doorstep some days later.
The only reliable way to unlock one of these is by attaching this part to the intake camshaft, taping off certain oil passages, and then blasting it with compressed air.
As I said, just buy a new one. Trust me, it’s not worth the average person’s time to mess around with procedures like that.
Off the top of my head you’ll need a valve cover gasket set, high temperature RTV, a flathead screwdriver, a small finishing nail (or push pin tack), a full set of metric sockets (shallow and deep), a metric wrench set (don’t forget a 23mm to hold the camshaft in place), a 1/2″ torque wrench, a floor jack, at least one jack stand, a flashlight, some kind of chemical cleaning agent, pliers (for PCV hose/clamp), and some kind of scraper to remove the old RTV gasket from the tensioner plate on the side of the engine.
ChrisFix on YouTube has a great video covering the procedure but know that reinstalling both the actuator and exhaust camshaft sprocket are surprisingly difficult to get exactly right. It’s very easy to accidentally rotate the crankshaft in the process while pushing/pulling on the chain to get everything timed correctly.
Remember, the K-Series is an interference motor. Good luck!
Ray Collins –
This idem only worked for a few months then failed.
I just had to go replace it with one from HONDA.
Marc Testani –
Funciono correctamente sin ningun problema
Michael K. Stewart –
I was being cheap and I installed this to fix the notorious K engine cold start rattle. It worked great for a week, 200 miles. It went bad and made the same noise again. I spent the $260 for the Honda factory part from the dealer and it runs perfectly. Now I had to do the same job 2x to fix the same problem. Don’t waste your time or money.
Farmer Fill –
Hondas Cam Shaft Phasers have a high failure rate.
I see a lot of them rattle badly on a cold start.
If you have any Cam/Crank relation codes, your going to have to replace the timing chain and guides at the same time.
I’d prefer buying the OEM Phaser from Honda, but they are always on back order or are days away for delivery.
This is my first time using an aftermarket part like this.
This Dorman part was also cheaper then through our parts suppliers.
I have my fingers crossed it doesn’t come back.