Finally....roller rockers for the 4L enthusiasts!

These roller rockers are available as a bolt-on/adjustable, or for reliable ultimate racing with screw in studs & proper guide plates for the application.

Your original rockers are 1.5:1 ratio, on top of being flat-tappet style, and not being a roller rocker. By installing 1.8:1 roller rockers you will gaining over 0.080 lift, at the valve, while not changing the duration at all, which will increase the air flow ratio coming into the engine, as much as a cam would do, but without the added expensive of upgrading your camshaft, upgrading your engine management system, and adding additional and costly shop rates, as many can install these themselves.

What makes these roller rockers unique, is the kits exclusive designed lifters. These lifters are the better choice, to keep the rockers properly lubricated by channeling the oil through new push rods, to the rockers providing proper top end lubrication modifying oil flow characteristics.

The stock push rods in Ford 4.0L OHV engines do not typically have oil holes. These engines rely on hydraulic lifters and a pressurized oiling system that routes oil through the lifters and up to the rocker arms via internal passages—not through hollow push rods with oil holes like some other engine designs.

You can expect upto 25 hp and 35 lbs torque gains (Flywheel) depending on other mods or tuning, could increase these figures.

*Please See Notes Tab

This kit includes:

Twelve (12) roller rockers
Twelve (12) hardened TMR pushrods
Twelve (12) special TMR lifters
Two (2) rocker mounting bars with hardware,
Pedestal & Hardware

If you're rebuilding or upgrading your 4.0L OHV, it's worth checking compatibility with your lifters and rocker setup before switching to our kit. Want help picking the right components for a build? We can walk you through it.

**Available 1.6:1, 1.7:1, & 1.8:1 roller rockers

1.8:1 Roller Rockers Kit - Ford 4.0L OHV V6

Name: 1.8:1 Roller Rockers Kit - Ford 4.0L OHV V6
Brand: Tom Morana Racing

$1,580.00

Engine / Year - *(Very Important) i.e. 4.0L / 1996

0/20

Quantity

4.0L OHV engines 1989-2001
Bolt-on is favored by many, as an alternative to a camshaft

.060" more lift at the valve

Great option for stock or upgraded cams

Avoids the expense/time of swapping your camshaft

Works well off of Factory ECU, tuning not necessary but well recommended to get the most performance and adjustment

INSTALLATION WARNING - The manufacture HIGHLY recommend soaking these rocker arms overnight in "Break-in-oil" that contains Zinc prior to Installation for the first 500-1000 miles of use. MOST synthetic oils and "On Road" petroleum based oils DO NOT contain any zinc. FAILURE TO DO THIS MAY CAUSE PREMATURE WEAR THAT IS NOT COVERED BY OUR WARRANTY

If you are not performing a full rebuild or new internals you DO NOT have to run have to run a Break-in-Oil for 500-1000 miles. Starting the engine and immediately bringing it to a moderate RPM range (around 2,500 RPM), then varying the RPM between a set range (like 1,500-3,000 RPM) for a period of 20-30 minutes , ensuring a slow, steady acceleration and deceleration pattern, all while using a dedicated break-in oil to facilitate proper wear-in of the camshaft and lifters; after the initial break-in period, change the oil and filter to remove metal debris.

Key points to remember:

Use break-in oil: Always use a specialized break-in oil with high levels of zinc and phosphorus to provide adequate lubrication during the initial wear-in process.

Start at a moderate RPM: When starting the engine, quickly bring the RPM up to a moderate level (around 2,500 RPM) to ensure proper oil flow to the camshaft and lifters.

Vary RPM range: During the break-in period, gradually vary the engine speed within a specified range (typically 1,500-3,000 RPM) to allow for even wear on the camshaft lobes and lifter faces.

Avoid sustained high RPM: Do not hold the engine at very high RPMs for extended periods during break-in, as this can generate excessive heat and wear.

Monitor engine sounds: Listen carefully for any unusual noises during the break-in process and stop the engine immediately if any concerning sounds are detected.

Change oil after break-in: Once the initial break-in period is complete, drain the break-in oil and replace it with fresh, high-quality motor oil to remove any metal particles generated during the process.

*A .PDF viewer is required to view these files.
Manufacture Warranty Information
INSTALLATION WARNING - The manufacture HIGHLY recommend soaking these rocker arms overnight in "Break-in-oil" that contains Zinc prior to Installation for the first 500-1000 miles of use. MOST synthetic oils and "On Road" petroleum based oils DO NOT contain any zinc. FAILURE TO DO THIS MAY CAUSE PREMATURE WEAR THAT IS NOT COVERED BY OUR WARRANTY

NOTE - if you have an upgraded cam, it's suggested that you go with an adjustable valve train (as longer pushrods are not available)

NOTE - it's suggested that you go with an Heavy Duty Spring Set with 1.6:1/1.7:1 ratio rockers, with 1.8:1 it is recommended and/or with aftermarket camshaft setups to prevent coil binding

NOTE - If you intend on upgrading your camshaft..make sure that cut the valve guide at least 0.100 more than stock height, to prevent your retainer from hitting the valve seal

NOTE - Your lower intake manifold gasket may need to be cut on the line where the push-rods go by, in order for them to clear

NOTE - 1.5 & 1.6 ratios don't require cutting of the intake gasket or intake manifold
Some parts or processes (anodizing) that make up this kit are made to order, lead times vary depending on order volume and availability of materials.

Please call or email ( sales@12degnorth.com ) for lead time before purchasing.

Approximate lead times

1-3 weeks

Ratio	1.5:1 = 0.00" Lift @ Valve 1.6:1 = 0.30" Lift @ Valve 1.7:1 = 0.50" Lift @ Valve 1.8:1 = 0.80" Lift @ Valve
Springs	1.6:1 = Suggested 1.7:1 = Suggested 1.8:1 = Recommended Upgraded Camshaft setups - Required Always*
Adjustable	Yes
TQ Spec	25ft lbs

1.8:1 Roller Rockers Kit - Ford 4.0L OHV V6

FITMENT:

FEATURES:

SPECIFICATIONS:

INSTALLATION:

WARRANTY:

ADDITIONAL INFORMATION:

LEAD TIME / SHIPPING