DOHC Head On SOHC Block...

[1997-Dodge-Neon]

Is it possible to put a DOHC Head on a SOHC Block?


Note: This is a 1997 Dodge Neon.

[Oldsmobile Doctor]

It will fit but the DOHC had a different PCM and trans gear as it made its power at a higher RPM. You will also need all the timing components IE belt, covers and idlers. The DOHC also used different pistons and without them the compression ratio will drop. All of this will cause a decrease in power. You will also need the intake and exhaust manifolds with throttle body plus any connectors that are different. I put a 1999 DOHC in a 1995 SOHC car and drove it to Florida twice, it will work but I had a complete donor car.

[1997-Dodge-Neon]

Somebody said the Exhaust Manifold/Header would fit it from the SOHC Head...

[Oldsmobile Doctor]

NAPA sells a different gasket for them

[1997-Dodge-Neon]

What about the Intake Manifold/Plenum Side?
Will the SOHC Intake Manifold fit the DOHC Head?

[Oldsmobile Doctor]

Sorry its different the SOHC is round and the DOHC is oval the single has o rings and the double has a gasket

[das2123]

Originally Posted by 1997-Dodge-Neon

Is it possible to put a DOHC Head on a SOHC Block? Note: This is a 1997 Dodge Neon.

Yes you can, the blocks are identical. You will need the following:

Used Parts you can get are: (from a DOHC of course)
*Head with cams and valvetrain
*Intake manifold
*Exhaust manifold (or DOHC header)
*Intake assembly (why not go with an Iceman or 3.0L intake?)
*EGR valve tube
*Pistons (you can use SOHC pistons, but you will lose compression)
*Fuel rail and injectors
*Passenger side motor mount bracket
*Valve cover
*Cam gears
*PCM for your year of car, 95, 96, or 97-99 (why not get a Mopar PCM?)
*Power bulge hood or cut the bracing out of your current SOHC hood.
*You can opt for the dual radiator fans, but I don't think you need them even if you have A/C

New parts you should get will be:
*DOHC Headgasket kit
*Timing belt/timing belt covers (if you want them)
*Timing belt idler pulley
*Plastic thermostat housing
*Upper radiator hose
*Camshaft position sensor
*Spark plug wires
*Head bolts
*New gaskets where you will need them.
*I'd also suggest changing the water pump while you are at it, along with the new timing belt and tensioner pulley

You will also need to extend the 3 CTS (coolant temp sensor) wires so that they reach it's new location.
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[jjk_52]

Originally Posted by das2123

*Intake assembly (why not go with an Iceman or 3.0L intake?)
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you can use a 3.0L intake on a 2.0L neon? will that increase power? and which 3.0l?

[das2123]

You need to find a late 80s or mid 90s 3.0L intake tube from a Chrysler vehicle. Use that intake tube to make your own Iceman like CAI.

[1997-Dodge-Neon]

OK...
1997 Dodge Neon...
SOHC 2.0L Block, 5 Speed, Stock Intake Manifold, 60MM TB, Port And Polished Head, GT35R Turbocharger, Turbo Back (No Cat Or Resonator) To HKS Hi Power Muffler...
How Much Horsepower Do You Think I'll Have?

[1997-Dodge-Neon]

JW Will The SRT 4 Turbo Manifold Fit SOHC Heads?

[das2123]

Originally Posted by 1997-Dodge-Neon

OK...
1997 Dodge Neon...
SOHC 2.0L Block, 5 Speed, Stock Intake Manifold, 60MM TB, Port And Polished Head, GT35R Turbocharger, Turbo Back (No Cat Or Resonator) To HKS Hi Power Muffler...
How Much Horsepower Do You Think I'll Have?

On stock internals...about 250-275 at the crank with an intercooler.

Originally Posted by 1997-Dodge-Neon

JW Will The SRT 4 Turbo Manifold Fit SOHC Heads?

No it will not. You will need an adapter plate.

[1997-Dodge-Neon]

What Are Those And I Get Them Where?
Know Anywhere I Can Get A Turbo Manifold Fabricated?

[1997-Dodge-Neon]

And A GT35R Turbocharger, I Thought About 300-400HP...

[das2123]

The only one I know of is called a Mattdog adapter plate. Runs about $250-$350 if i remember correctly.