Jeep 4.0 Block 4.2 Crank Stroker Parts Compatibility: The Complete Guide by Chad Golen February 19, 2026 0 Key Takeaways: Successful 4.0 block/4.2 crank stroker builds require careful matching of rods, pistons, bearings, and professional balancing to achieve reliable, pump-gas-friendly performance. Electronics integration—especially crank position sensor, flywheel, and harmonic balancer compatibility—is critical for seamless operation and trail reliability. Professional machining, dynamic balancing, and precise assembly are essential to prevent premature wear. The Jeep … Read More
Upgrade Your Jeep from a 4.0L to 4.6L Crate Motor by Chad Golen September 9, 2025 0 The 4.0L inline-six engine has long been recognized as one of the most reliable engines on the market. It was the stock engine in most Jeep CJ, Wrangler, and Cherokee models between 1971 and 2006. However, despite its reliability, it was notoriously underpowered. Whether you have an old Jeep that you need an engine for, … Read More
What is an LS Swap and Why is it so Popular? by Chad Golen July 21, 2025 0 In the world of automotive performance and restoration, few phrases generate as much excitement and discussion as “LS swap.” Motor Trend noted in 2020 that “the Chevy LS V-8 engine has become the de facto engine swap suggestion for anyone seeking to add power to their existing platform” due to the engine’s remarkable combination of … Read More
Unleashing Power: Golen Engine’s Premium LSx Short Block Engine Options by Chad Golen July 16, 2025 0 Expert Engine Builders Building LSx Short Block Legends When it comes to building a high-performance engine that delivers exceptional horsepower and torque, the foundation matters more than anything else. Golen Engine Service has established itself as a premier destination for LSx short block engines. We offer a comprehensive range of options that cater to everything … Read More
Inside Look at Golen’s 427 LSx Crate Engine: Boosted to 1000 HP by Chad Golen May 14, 2025 0 Hey everyone, Chad Golen here from Golen Engine Service. I’m excited to give you the full scoop on our 427 LSx Crate Engine that’s boosted—a real beast that pumps out over 1000 horsepower and 900 ft-lbs of torque. We’ve been building high-performance LSx crate engines for over 20 years here in Hudson, New Hampshire, and … Read More
Jeep 4.6 Cooling System by Chad Golen September 29, 2021 0 We have had quite a few customers ask about what keep this engine cool and here is a list of what you will need: Areas of the country where there is not extreme heat Stock Radiator will work in most cases (makes sure yours is in good shape) Stock Clutch Fan Stock 190 Degree Thermostat … Read More
LS1 Vs. LSx Engines: What Is The Difference? by Chad Golen March 19, 2019 0 If you’re shopping for a crate engine to drop in your classic car or street rod, an LS is often an excellent choice. A problem you may face though, thanks to the naming convention used for GM engines, is this: Do you want an LS1 or what engine builders like us refer to as an … Read More
What Makes LS Engines So Great? by Chad Golen January 22, 2019 0 When it’s time for an engine swap, the LS is a popular choice. It fits just about any vehicle and can generate lots of horsepower. Whether you’re upgrading an older GM vehicle or building something special, an LS engine might be just what you need. Here, we’ll share some information about the LS, explain what … Read More
Morel Hydraulic Roller Lifter Adjustment Procedure by Chad Golen November 18, 2018 0 Street Performance: The Street Performance hydraulic lifters are made from a cold formed body with a clipped axle and have a 6500 rpm capability. These lifters have .120″ plunger travel and have an 80% fill rate with the test oil. The lifter wheels in this series are .700″ diameter. Recommended Spring Pressure: 100-180lbs Seat Pressure … Read More
Keeping your Jeep Engine Running Cool by Chad Golen November 17, 2018 0 We have quite a few customers calling and asking about the best way to keep their Jeep engine cool when running in hotter regions of the country. Here is New England we do not seem to have a problem with this since the weather never gets too hot, in fact my 2006 Rubicon runs 210 … Read More