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Discussion Starter #1
This might be a stupid question but is it possible to upgrade the camshaft in a 200 with the 2.4l using hydraulic flat tappet cams?
 

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There are no stupid questions but are you wanting to replace your hydraulic roller with an hydraulic flat tappet??

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Randy
 

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The 2.4 has a mechanical flat tappet camshaft, I doubt anybody is going to offer a hydraulic setup do to the modifications that would have to be done to the oiling system in the cylinder head.
 

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The 2.4 has a mechanical flat tappet camshaft, I doubt anybody is going to offer a hydraulic setup do to the modifications that would have to be done to the oiling system in the cylinder head.
The Chrysler 2.4 uses hydraulic lash adjusters and a roller rocker.
Not a mechanical flat tappet.

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Randy
 

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What year is your 2.4??

Up to 2014, the 2.4 had Dual Variable Valve timing and the computer selected the cams position and overlap for max. performance and economy.

Not that it couldn't be improved upon, just no one has yet tried to implement a different cam profile to work with the VVT and computer that I know of.

2015 went even further with both VVT and variable lift.

If you want a performance 2.4, there were three, the Neon SRT 4 or the Caliber SRT 4, both with turbocharged 2.4 engines and manual transmissions or if you need an automatic, the PT Cruiser Turbo was available in both automatic and manual.

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Randy
 

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Discussion Starter #9
Okay I have a 2011 with an automatic so what do you suggest I try from your personal preferences and experiences.
 

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The Chrysler 2.4 uses hydraulic lash adjusters and a roller rocker.
Not a mechanical flat tappet.

Thanks
Randy
The 2.4 that is used in the 200 is a mechanical flat tappet. It uses different height lifters from the factory to get proper lash. I just done 2 of these heads in my machine shop and they are not a hydraulic roller, the old 2.4 yes, these,no.
 

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The 2.4 that is used in the 200 is a mechanical flat tappet. It uses different height lifters from the factory to get proper lash. I just done 2 of these heads in my machine shop and they are not a hydraulic roller, the old 2.4 yes, these, no.
Well, I certainly can't argue with you as you've had some engines apart, so I concede you are correct about the mechanical tappet. If you don't mind could you share the lash spec. and what caused you to have the engines apart in the first place ?? My fear is the lash was somehow too tight and burned a valve.
I've seen this on many Honda engines that require periodic lash adjustment and have assumed they never actually got adjusted or adjusted too tight or valve wear lessened the lash.

On the 2.4L, 200, is the rocker a roller or slider??

I appreciate the education and hope you have time to respond !!

Thanks
Randy
 

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Randy this 2.4 has no rocker arm. The cam lobes run directly on the lifter bucket "lifter" which is directly on top of the valve. The 2 heads i done was covered by dodge's warranty. One head had no compression, valves had tightened up. I done a valve job reset to correct lash and it was fixed. The valves on these heads cannot be adjusted by your do it yourselfer because of the timing chains having to be removed. The second head was my personal car 2012 15,000 miles. The coolant was cooling down about 30-40 degrees when the engine was being revved, fine at cruising speed. Faulty head gasket to blame.

Please don't ask why the car was cooling down and not heating up because the service manager and i both were puzzled. I pressure tested the head, resurfaced it and back it went. So far so good. Now to answer your lash question. I think intake was .007-.009 and exhaust was .010-.012
but don't hold me to that.

Any more questions feel free to ask.
 

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Discussion Starter #14
Randy this 2.4 has no rocker arm. The cam lobes run directly on the lifter bucket "lifter" which is directly on top of the valve. The 2 heads i done was covered by dodge's warranty. One head had no compression, valves had tightened up. I done a valve job reset to correct lash and it was fixed. The valves on these heads cannot be adjusted by your do it yourselfer because of the timing chains having to be removed. The second head was my personal car 2012 15,000 miles. The coolant was cooling down about 30-40 degrees when the engine was being revved, fine at cruising speed. Faulty head gasket to blame.

Please don't ask why the car was cooling down and not heating up because the service manager and i both were puzzled. I pressure tested the head, resurfaced it and back it went. So far so good. Now to answer your lash question. I think intake was .007-.009 and exhaust was .010-.012
but don't hold me to that.

Any more questions feel free to ask.
Okay if I was trying to mod this thing regardless money what and or how could this be done?
 

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Randy this 2.4 has no rocker arm. The cam lobes run directly on the lifter bucket "lifter" which is directly on top of the valve. The 2 heads i done was covered by dodge's warranty. One head had no compression, valves had tightened up. I done a valve job reset to correct lash and it was fixed. The valves on these heads cannot be adjusted by your do it yourselfer because of the timing chains having to be removed. The second head was my personal car 2012 15,000 miles. The coolant was cooling down about 30-40 degrees when the engine was being revved, fine at cruising speed. Faulty head gasket to blame.

Please don't ask why the car was cooling down and not heating up because the service manager and i both were puzzled. I pressure tested the head, resurfaced it and back it went. So far so good. Now to answer your lash question. I think intake was .007-.009 and exhaust was .010-.012
but don't hold me to that.

Any more questions feel free to ask.
I appreciate the up date and now understand the valve train design!
All you said was correct, apologies to the_komrade for my incorrect info.

Thanks
Randy
 
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