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I am wondering about feedback on the 2.4L Forte motor.... is this motor currently in any other cars, and if so, has it been reliable? Any complaints?
 

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2.4l

Yea, this motor is used in the Kia Optima. As far as I know, there haven't been any issues with this motor. A good friend of mine has worked for Kia for almost 3 years, and he told me that those 2.4s are solid without any issues.
 

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No mechanical problems on our new one but they are very thirsty in my opinion. Averaging between 22.5-24.5 per tank. 75/25 city hwy
 

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No mechanical problems on our new one but they are very thirsty in my opinion. Averaging between 22.5-24.5 per tank. 75/25 city hwy
Are you sure it's not because you're driving a little harder in your "New" car?! lol!:D
 

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mitsubishi and chrysler both use modified versions of the theta as well and pay royalties to hyundai as the developer of the motor
 

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Yea, this motor is used in the Kia Optima. As far as I know, there haven't been any issues with this motor. A good friend of mine has worked for Kia for almost 3 years, and he told me that those 2.4s are solid without any issues.

That is what I like to hear, the last thing I want is to spend a whole bunch of hard earned money and then have nothing but problems with the car - I hate dealing with car dealerships and especially the garage repair shops.
 

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Believe it or not but the good track record of this engine was one of the reasons I picked the Forte. No more laughing at Kia cars anymore...they are reliable, sporty and every other car brand should be jealous.
 

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2021 Forte GT w/GT2, Currant Red, SXTH Element Intercooler Kit, Evilla Exhaust, Takeda S2 Intake
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2021 Forte GT w/GT2, Currant Red, SXTH Element Intercooler Kit, Evilla Exhaust, Takeda S2 Intake
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Sorry what is VIS ??? Velocity/Variable intake system ...That i don't know..
Yea, Variable Intake System...intake changes form a long runner to a short runner intake. Long for low speed operation, short for high speed operation.
 

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I heard some negative things about the Kia 100,000 mile warranty relative to owner
responsibility for some items--notably the timing belt. The confusion came from the
requirement that the timing belt be changed at 60K if there was wear. If this was not done and the belt failed at 80k, the warranty was void. The rational was that this was not part of the normal wear and tear on the engine! Now KIA engines are what I learned are intrusive which means that if the timing device fails--all hell breaks loose. Toyota has a non-intrusive engine where if the timing device breaks--it just breaks and nothing else is damaged--this would seem to be the better design. However, all is well
as the new Kia forte has an all aluminum engine without a timing belt. It has a chain
and needs no attention for 100k so the whole subject is moot. It took about half an hour and three technicians at the local Kia dealer to ferret out this information. They were not being secretive--they did not seem to know. I am concerned as I do not think this sort of information is particularly exotic or arcane. On the other hand it is the first year for the car. The engine is from Hundai and is derived from something called the "THETA" family. The same basic engine is licensed to Mitsubishi and Chrysler and apparently there are no real issues unresolved. I feel better.
 

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I heard some negative things about the Kia 100,000 mile warranty relative to owner
responsibility for some items--notably the timing belt. The confusion came from the
requirement that the timing belt be changed at 60K if there was wear. If this was not done and the belt failed at 80k, the warranty was void. The rational was that this was not part of the normal wear and tear on the engine! Now KIA engines are what I learned are intrusive which means that if the timing device fails--all hell breaks loose. Toyota has a non-intrusive engine where if the timing device breaks--it just breaks and nothing else is damaged--this would seem to be the better design. However, all is well
as the new Kia forte has an all aluminum engine without a timing belt. It has a chain
and needs no attention for 100k so the whole subject is moot. It took about half an hour and three technicians at the local Kia dealer to ferret out this information. They were not being secretive--they did not seem to know. I am concerned as I do not think this sort of information is particularly exotic or arcane. On the other hand it is the first year for the car. The engine is from Hundai and is derived from something called the "THETA" family. The same basic engine is licensed to Mitsubishi and Chrysler and apparently there are no real issues unresolved. I feel better.
"Intrusive" vs. "non-intrusive" means "valve interferece fit vs. non-interference valve fit" in relation to the valve position at the top of the piston stroke. If the timing belt (or chain for that matter) gives up the ghost and breaks on an interference fit engine, the intake and exhaust valves will not be timed to all be closed at the top of the piston stroke, in which case one or more pistons will strike an open valve resulting in mass destruction of the valves, possibly bent or broken camshafts and crankshaft and tops of the pistons and connecting rods. Not good. On a non-interference engine, the valves are recessed into the head so that if the belt or chain breaks, even if a valve is open at the top of the piston stroke, there is enough clearance in the recess that the piston won't strike the valve even if the valve is open. That is why it is so critical on engines with timing belts AND interference fits to have them maintained, changed and checked OFTEN because if they DO break, you will basically have to buy a new engine or have said engine completely rebuilt. So why not build ALL engines with a non-interference fit valvetrain? The reason that manufacturers use belts instead of longer lasting chains is for two reasons---they are much quieter than chains; the second reason is to save space. In order to have a non-interference fit valvetrain, the head has to have a higher profile to allow for the extra valve clearance--so less engine displacement (smaller engine, less horsepower) under the hood is the result. The great thing about the Hyundai/KIA Theta engine is that Hyundai engineers somehow figured out a design to make a multivalve VVT (variable valve timed) engine almost as quiet using a chain drive. It is (and was) one of the major deciding factors in my decision to buy Hyundai/KIA products with this engine--my Forte 2.4L for example. I traded an 08' Optima that uses this same engine for the Forte. I had zero issues with the Optima and is a surprisingly quiet chain valvetrain timed engine. No worries about having to spend $600-1000 USD every 60,000 miles to replace a timing belt is a no brainer. Perhaps someday the Japanese makers will learn to reverse engineer this valvetrain design from Hyundai-----
 

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2021 Forte GT w/GT2, Currant Red, SXTH Element Intercooler Kit, Evilla Exhaust, Takeda S2 Intake
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too bad its chain driven..NO Belt
No, that's GREAT! With a belt you must replace it 40-60K miles depending on manufacturer. That's a lot of dough to do! Chains last longer and there is less possibility of slipping -- at least until 100K miles.
I'll take a chain drive system over a belt anyday...been there done that...LoL!
 

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I've driven a 2.0 for that last year, now I have a 2.4. The 2.4 seems the smoothest running engine I've ever owned. They really did a good job mapping the drivetrain out this time. No hesitations crisp, smooth shifts, I am really happy with my SX.
 

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The engine in the Forte is the same as in the Lancer, Mitsubishi calls it the 4B11 (2.0L) and 4B12 (2.4L). They have a great record in cars such as the Dodge Avenger and Dodge Caliber. They make good power for their size and are responsive to performance parts and good maintenance. If you keep up on oil changes and belt replacements this engine will go a long time.
 

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The engine in the Forte is the same as in the Lancer, Mitsubishi calls it the 4B11 (2.0L) and 4B12 (2.4L). They have a great record in cars such as the Dodge Avenger and Dodge Caliber. They make good power for their size and are responsive to performance parts and good maintenance. If you keep up on oil changes and belt replacements this engine will go a long time.
I thought this was discussed before and that the Hyundai engine is not the same as the Mitsu engine -- It is an engine that Hyundai recently came up with? I'm sure this will be discussed once more...I don't feel like searching for the info again.
 
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