Super nice and knowledgeable professionals with great customer service. Legit gear heads.This is my 1st job with them, Ill let ya know how it works out.

These guys are great to work with! Very knowledgeable and make things right even if the vendors send the wrong parts. Upgraded my camshaft. Melling sent the camshaft incomplete and R n R upgraded me to a comp cam for no charge. Melling dropped the ball for sure, but these guys made it right. Diffidently recommend them for engine work.(Jon Hershberger)

Yes they know what their doing. Connecting rod clearance a piston? Install rod bearings correctly? Wrong connecting rods, didnt deck the block, didnt use a deck plate to bore the block for the pistons. But as Rich will tell you, were all a bunch of idiots. Building an engine that could kill someone, you make your own choice to use them or not.

At RNR the quality and standards that they uphold are unchallenged in the entire valley. I love the work they have done and how they pay attention to every small detail. Great things take time and can’t be rushed. They use the most up to date equipment out of all the shops in the immediate area. From a CNC Mill to an automatic hone, RNR has it all. I can never say enough about the quality of work these great guys provide!

Absolutely amazing. Robert and his crew are very knowledgeable and have answered every question I have had. Their work is immaculate and my engine looks brand new. I definitely will be coming back and sending my friends his way.

Awesome guys to deal with, really knowledgeable and top notch quality. Very pleasant experience having my Diesel engine machined. They took the extra time from their day to explain what I needed and why it was the best option. Would highly recommend to anyone in need of a machine shop. I’ll be coming back for all my engine work. Thanks RnR

After telling Rich and Robert my make, model,year, and engine information; they quoted $1650 (plus tax) to bring in long block and pickup long block (with 7 day turnaround). While bringing it in; they mentioned that mine was standard with roller cams which they clearly already knew (b/c it comes standard). After not hearing back for 5 days; I called and they said they would clean and measure engine parts in the next day and contact me back. No calls until I called the middle of the following week (10 days later). Still no information. He said he was sitting down to write up my file and send me information. Nothing arrived that day; next day (13 days, now) I got estimate with >25% increase on original estimate (which was made knowing my make/model/year/engine). ((reminder; this was a running engine with good core and no broken/missing parts)). Now they wont meet their original estimate! There is no difference in the engine as quoted/inspected! AND NOW they want to charge me nearly $200 for cleaning and measuring and not doing the machine work. I would rather they met their original quote or I will be contacting the BBB and other authorities.

Really happy with the engine work RNR Custom Engines performed! Upon my initial visit to the shop, Robert and Richard took the time to walk me around their shop, and show me the machines and the process they would use to complete the work on my engine block. I decided to have them clean, bore, deck, and clearance my block for a stroker crank and new rods and pistons. The work took a little longer than anticipated, and they are not lowest-cost shop compared to others I visited in the valley. But the quality of workmanship, as well as their commitment to providing great customer support, even after the work was done was well worth the time and money. If you are looking for an honest shop to do quality work, this is the engine shop to use in Phoenix.

They have repaired more than one engine for me and it was done right the first time. Straight forward old school type of guys. If you want quality and integrity give them a call. Best in the biz as far as I am concerned!

These guys were great to deal with and stand behind their work. You get what you pay for and RNR is worth paying a few extra bucks to get quality work and support. With their open door policy I was able to watch my engine get built!

Good guys

Best experience ever! Long story but short I broke a cam cap bolt inside of my head. I tried using a ez out but I broke two drill bits in the process. And adding to that I drilled the hole all crooked so then i said to my self Ill let the pros deal with it. So I took it to RNR and they quoted me $400 just to get everything fixed with extracting out two broken drill bit and re-aligning the hole then tap it on top of that line hone the cam caps. I was like gosh that a lot but then the gentlemen asked if I can source another head I say I can for $200 and then on top I asked if I can get the head decked and vat he said $120 (this was my choosing). He said to save you a little money thats the way I should go. Thats what I did. Honestly these guys are very honest and knowledgeable in engine building. These will be my go to guys for a every long time with any engine work I need. Thanks RNR you have a happy customer!

This honest and ethical family-run business has worked on my cars and engines for over 10 years. Cant say enough good things about them. Check out the video of my rebuilt Olds 455 on their website. They were able to dial in the fuel injection on their run stand.

Robert and Richard are extremely knowledgeable, amazing craftsmanship. If you are looking to have machine work done or a complete engine build RNR Custom Engines is the place to go. They have state of the art CNC machines, including a CNC engine block center that with make you engine perform better than the manufacturer ever thought they could .

I have had multiple engines built and machine work done over the last 20 years they have always done a good job

I had the motor pulled and delivered it to RNR for over haul. The 1970 Dodge 360 had seen better days. The valves were worn and required replacement, One piston the Pin was worn and a rod had to be replaced. The valve Train was complete worn out and was replaced.When the assembly of the motor started I happen to be there. I spent the last 12 years being a Quality Test Engineer. I watched as the motor was being put to gather. The process stopped when the mains bearing Clearance was barley out. The block was the line honed or bored. I had to leave.What I watched was craftsmanship at it finesse. These Guys strive to put out the best product.The motor was installed for me at Ace Auto Repair. I then did my best to put a few miles on the car before i took it to California to the Mopar Spring Fling.On the way to the show I lost a Rod Bearing. I brought the car home and stopped by RNR to let them hear the Motor to determine the Issue as I was not totally sure of the problem.RNR pulled the motor replaced the Crank shaft and the Rods and reinstalled the motor free of charge. They even held up finishing the job to allow me to change out the power steering box.I you are looking for a Class Act in the Motor Rebuild Sector of our world Talk to these Guys as I feel they are the best that I have had the pleasure to do business with.

They have always been super flexible, from the simple to custom parts. When a half dozen machine shops in the valley wouldnt touch my dragbike parts, these guys came through for me in a big way.

RNR has built several motors for me. Good guys and they stand behind their work.

Worst experience ever! Took forever,engine had no power and then seized. They broke my block,replaced it with junkyard block,didnt sonic test,which I had indicated as an absolute must . Never again.

Awesome people they looked at my head and could of easily said oh it needs this and that but instead of that they where honest and saved me a lot of money well worth going to them

Don’t do business with a company that employs people who can’t drive... especially a mechanic