Big Bear Engine Company

05/31/2026

"They were very easy to work with, and everything has worked very well." says Todd on Google

★★★★★ They were very easy to work with, and everything has worked very well.

05/30/2026

"I purchased two 4JB1 units with PTO. I set them up on trailer setups moving 3x2 water transfer pumps. They do just fine the Hot Summer of South Texas heat." says John on Google

★★★★★ I purchased two 4JB1 units with PTO. I set them up on trailer setups moving 3x2 water transfer pumps. They do just fine the Hot Summer of South Texas heat.

05/30/2026

"Been a while since I installed the new 4bta engine. Install went well with a few modifications because of a different fuel shutoff solenoid set up. Delivery was prompt and my salesman had everything figured out correctly. Haven’t run the machine that much. Less than 300 hours. Runs very well. Did have it over heat driving up a hill empty. It’s a logging forwarder. It was empty and had no tracks on the machine. So it.." says Dennis on Google

★★★★☆ Been a while since I installed the new 4bta engine. Install went well with a few modifications because of a different fuel shutoff solenoid set up. Delivery was prompt and my salesman had everything figured out correctly. Haven’t run the machine that much. Less than 300 hours. Runs...

05/22/2026

And now for something completely different, yet somewhat similar!! What is the completely different? Well I'm glad you asked, It's the fact that we have a customer up in Canada who owns a company called Yukon Airboats, and the latest version of their airboat will be using (this is the similar part) a 6BTAA230HP 5.9 12 Valve that has been warmed up and given some love from Justin at . Justin gave the injection pump the needed parts and love with some injectors to get this 6B in the 310-325 hp range with around 1000 plus foot pounds of torque! We are so excited to see a 12 Valve 5.9 powering an airboat!!! Look at that crazy overdrive gear box that is direct drive off of the crank, that will soon have prop attached to it!!! This is awesome and we are so thankful to be along for the ride!!

05/15/2026

Scout,,, Tis the Season!!
In the passed 2 weeks we have had an influx of Scout calls... and the 4BTAA140HP extended long block that we offer is just the ticket. Finding something fuel friendly, powerful, hood line friendly and different is not easy but here at we specialize in the " different".
We have 3 going out as we speak and I cannot wait to get the pictures to share with you all as they come together!

As always, thank you for having us along for the ride!!

05/07/2026

Did you know that has marine B series Packages?! These are intended for a repower of your favorite vessel that needs some new power love!
• 4BTA200HP or 6BTA280HP “Extended Long Block” these include complete fuel systems (P-series Pump), intake and exhaust manifolds with an HX rear mounted water cooled turbo and exhaust manifold, jacket water aftercooled intake, heat exchanger cooled with sea/raw-water pump, these come with SAE #3 flywheel housing, SAE 10" / 11-1/2" flywheel, 12 or 24 Volt electrics, standard rear sump oil pan (industrial pan).
Let us help you on your summer projects now so you can enjoy them instead of getting caught working on them when the weather is good!

05/03/2026

"Patrick Garland and Nikki Garland was extremely helpful and with friendly service. I really appreciate their help getting things taken care of me and what I wanted for my F350 conversion to a "Fummings"." says David on Google

★★★★★ Patrick Garland and Nikki Garland was extremely helpful and with friendly service. I really appreciate their help getting things taken care of me and what I wanted for my F350 conversion to a "Fummings".

05/01/2026

The "soon to be released" ISB4.5e Extended Long Block Plus Rear Gear Train, High Pressure Common Rail is finding its way into some frame rails with some good partners!

This is us taking the next step in doing "repower" conversions. Adding to our awesome lineup of 4B and 6B mechanical offerings!

What it will include:
ISB4.5 Rear Gear Train engine assembly with base rating 240HP@3400rpm for repower ( Optional 290HP initially, we will see where it goes from there!) High Pressure Common Rail fuel system, 12vt electrics, rear sump oil pan.
Repower package includes viscous fan clutch and fan, starter and alternator, freon compressor, hydraulic power steering pump (remote reservoir customer supplied), chassis harness with throttle pedal, electric vacuum pump and reservoir, GM 4L80E transmission adapter and flywheel.

Here is latest customer project... Land Rover with a 4.5 surprise under the hood!!
And then we have Justin Herring at building his short bed Chevy shop truck... it will be a ripper!

04/16/2026

"I am the service manager at a diesel repair shop that also services motorhomes and RV and we had a customer supply there engine one time (we don’t usually accept this) and it was a great experience and he has been gone for about 2 years with 0 issues with the engine install. Recently we had a customer that needed an engine and so we ended up sourcing engine from big bear. They have great customer service, sense of.." says Emily on Google

★★★★★ I am the service manager at a diesel repair shop that also services motorhomes and RV and we had a customer supply there engine one time (we don’t usually accept this) and it was a great experience and he has been gone for about 2 years with 0 issues with the engine install. Recent...

04/13/2026

"Very awesome company to deal with.." says josh on Google

★★★★★ Very awesome company to deal with..