Stephen Edelstein - Contributing Writer. Kirk Bell - Senior Editor. Ford patents retractable exhaust tips. Motor Authority Newsletter Sign up to get the latest performance and luxury automotive news, delivered to your inbox daily! Sign Up Today! Follow Us on Instagram motorauthority. Car Tech Features View All. Chicago Detroit.
When placed at an angle for the boxer configuration, injectors have to work extra hard to send fuel jetting into the engine at the proper rate. This extra effort can result in rapid wear of the injectors' moving parts. When the injector starts to wear down, it will develop a constant ticking noise. If this problem goes on too long, the injector will eventually fail and cause lean conditions, which could overheat and damage your engine internals.
Due to the unique layout of the boxer engine, the exhaust pipes coming off the manifold are exposed to excessive temperatures.
These temperatures can break down the metal materials quickly, resulting in an exhaust leak. The exhaust coming out of the resulting holes often makes a rhythmic ticking noise. When this problem starts to develop, you might even notice a slight smell of exhaust in the cabin area. In addition to making a racket and smelling bad, the leaking exhaust could also cover the engine bay in a thick layer of dirty soot.
More than likely the piston tops are hitting the vavles. The Porsche doesn't sound like this View Quote Porsche 6 cylinder boxer engine. View Quote This. Equal length headers make the car sound more like you'd expect.
View Quote Subaru boxer sound. It's actually just the turbo cars because there is a long downpipe from one side of the engine to the turbo, so you have one cylinder bank having to run an extra 2ft or so to get to the tailpipe. The mazdaspeed3 has a similar sound when modded because the oem turbo manifold has the turbo right next to cylinder 4 so 1 has a longer run.
This usually goes away with an aftermarket turbo manifold since they usually get made symmetrical or close to it. The Porsche doesn't sound like this Porsche 6 cylinder boxer engine.
Subaru also makes a six cylinder boxer. Sure, if you like the sound of souped up lawn mower. View Quote Weren't you just in another thread white knighting brodozers?
Especially the newer ones. View Quote Funny you say that. I'm not a Scooby fan. But I see way more flat billed faghat wearing Bros driving jacked up mall crawling brodozers than subarus.
View Quote No they dont. View Quote. Weren't you just in another thread white knighting brodozers? I'll give you a hint. I'm not a brodozer proponent and I concur with the brodozer proponent, whether or not he said it in jest. View Quote lol. Way over my head. Yes, Clarkson is a brodozer proponent.
How did I miss that?! Read it in a Clarkson voice. The new engines, especially the four-cylinders, are extremely efficient so they have very low friction. Because of that, this process assists the engine behavior at start up to help them warm up. When the engine coolant temperature is approximately degrees Fahrenheit or below, the ignition timing map in the ECU is changed to retard the engine timing. This timing change is done in order to quickly heat up the exhaust catalyst to reduce emission gases.
This change causes part of the combustion process to occur as the exhaust valves are opening in the cylinder head. The release of the high-pressure combustion gasses entering the exhaust system causes this noise. Depending on several different inputs into the ECU, such as engine coolant temperature and throttle opening angle, this noise could occur until the engine coolant temperature reaches the desired temperature.
The timing change logic is slightly different from model to model. This slight difference means that some vehicles have different noises. The noise is not harmful to the engine or exhaust system.
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