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Tuesday 7am - 5pm Wednesday 7am - 5pm Thursday 7am - 5pm Friday 7am - 5pm Saturday 7am - 3pm

Devil Dog Auto & Diesel

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United States
Farmington, NM
Devil Dog Auto & Diesel

Suspension, gas engines, electrical repair, a/c, hydraulic, Diesel engines, brakes, drive axles, general maintenance.

10/17/2026

It’s important to get your vehicle oil levels checked periodically.
We had a vehicle towed in. Driver reported vehicle just stopped moving. Come to find out the 4X4 pinion shaft had twisted off. Once it twisted off the differential ring gear pulled the internal pinion shaft in then shoved it through the top differential housing. Attached are a few photos. As you can see the differential housing is busted open on top. It popped the axle tube rivets as well. It had some oil. But not enough for lubrication.
When you vehicle is serviced. Do you know if your differential/s, transfer cases, manual transmissions are checked for proper oil levels?
Focus on the moment & drive safe.

06/28/2026

We will be closed July 3rd - 5th to celebrate our great country’s 250th birthday. We will reopen on Monday July 6th. Thank you to all active military and veterans for your service to our country protecting our freedoms. ❤️🇺🇸

05/22/2026

We will be closed Saturday May 23, Monday May 25 and Saturday May 30

05/16/2026

A passing through guy calls regarding his 20’RAM fixing to go into limp mode. 30 minutes later he walks in & sees my T-shirt. He wasn’t happy. He: you a TRUMP fan. Me: 100% this is TRUMP country. He said ok. He leaves. I bet they don’t even known why they hate the man so much.
He’ll be stranded along side the road when his Dodge truck reaches the end of the line of limp mode. All I said was, “have a good HOT day.”

01/02/2026

Some thing’s we at Devil Dog run into. Yes it’s been awhile. We did a new 5.9 Cummins engine swap. Owner wanted an upgrade. Upgrade known as “Boss Hoss” air intake. (View the video)
Another is a Lincoln Classic weld machine. Weld machine came in not running. Diesel injection pump assy as seized up. Replaced the diesel fuel injection pump & timed. Machine has not ran over 4 years. We cleaned out the fuel tank. It had more issues than just the injection pump. It kept going into shutdown. The electric fuel pump & injection pump shut off soleniod was hooked up in series. Reconnect them parallel. Furthermore, found the alternator was not charging. But it would stay running when alternator was disconnected. Reconnect it & it shuts down. Then we found out the amperes gauge was hooked up backwards.
This next issue was just due to observation. I’ve seen it happen on off road equipment. The fan blade was installed backwards.
Heres a DIY. Found diesel fuel injectors electrical harness loose connection. However it has 3 injectors out as well. Plus a turbo wastegate issues . All contributing to low power.
We also found a SUV turbo that was damaged due to “lack of maintenance.” It happens to diesel pickups as well. We had one the owner went out & started hisdiesel pickup. When he came out to leave. The engine was locked up.
Oil sludge will do a lot of damagd to your engine - gas or diesel.

12/18/2025

Merry Christmas!!!

Dec 24th - We will be closing at noon
Dec 25th - Closed all day
Dec 31st - We will be closing at noon
Jan 1st - Closed all day.

Be safe. Enjoy time with your loved ones.

11/07/2025

We will be closed 11/11/25 in observance of Veterans Day.

10/27/2025

Thought I’d share something interesting. You ever had a coolant system repair on your Duramax. Then you find out the engine vibrates. It never did that before. Some of these cooling system repairs require the crankshaft dampener be removed. This is basic stuff most service people know. The dampener is keyed or pinned. But humans do make mistakes. A Duramax has a pin in the crankshaft where the crankshaft dampener slides over the nose. The dampener is a snug fit where it does not require a puller to remove it. The crankshaft dampener is held in place with one center bolt. As you see in the photos the dampener was not positioned properly and was drawn on by force. This caused the dowel pin to shear. You can see the light surface gouge. As much torque is applied to the center mounting bolt. The dampener can still rotate slightly without a pin. This created a torsional vibration. Under a heavy load the crankshaft can & will TWIST in two. The positioning of a crankshaft dampener is critical.
We ended up drilling the broken pin out. Believe me. These pins are hardened. Now the question is where did the pin that sheared off go? As small as this pin is it can do costly engine damage.
If your Duramax engine is vibrating. There has to be a reason. It did not vibrate before. It just had coolant system repairs. Afterwards it started vibrating.
Drive safe & focus on the moment.

10/03/2025

Our hours are changing temporarily.

We will be closed on Mondays and open all day Saturday. We apologize for the inconvenience this may cause.

09/01/2025

Let’s talk about diesel air intakes. All those nice colored intakes piping is eye catching. Look whats mounted at the end. These filters are only good inside your garage. These filters do more damage to your diesel engine. More than you realize. This is not for a dusty environment. Ive seen more engine failures due to these filter configurations.
Visualize this. That air filter is plugged up. What happens? You have seen this. A straw in a beverage with ice. You draw that drink & ice blocks the tip of the straw. You try hard to draw your drink. What happens to the straw? Yes it collapses. So when the air filter is plugged. What do you suppose happens? Just like the straw. Something has to give to equalize pressure. Due to pressure differentials what gives? The weakest link gives. What is the weakest link when the air intake connection fail to give. The turbo seals become the weakest link. Engine oil enters the low pressure of the air intake. Now you have engine oil being expelled into the turbo discharge. Where does that route too. Engine oil with hot air now enters the intercooler mounted in front of the radiator. The high discharge temperatures dissipates to the atmosphere via the intercooler. Anyone know the approximate temperature is when the air leaves the turbo discharge horn? This is basic knowledge. All diesel techs should know this.
So when the air filter is plugged like the one you see in the photo. Small dirt debris enters your intake. A mixture of engine oil & dirt debris flows down stream. It’s gritty mixture of OIL & DIRT. Is that what you want entering your $16k+ engine? Looks are deceiving. Look at these photos. This is the inlet & outlet of a intercooler. This not only causes low horsepower. It damages your engine. If you use these filter. WASH THEM. If not you’re better off with OEM filter configurations.

Address

7975 E Main Street
Farmington, NM
87402

Opening Hours

Tuesday	7am - 5pm
Wednesday	7am - 5pm
Thursday	7am - 5pm
Friday	7am - 5pm
Saturday	7am - 3pm

Website

http://Www.devildogauto.com/

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