Auto Maintenance Services

The auto professionals at our garage know that the first step to caring for any car is routine maintenance. Our team can provide:

  • Oil and filter changes
  • 30k, 40k, 60k and 90k services
  • Coolant flushes
  • Air filter inspection and replacement
  • Belt tightening and hose replacement
  • Power steering fluid changes
  • Brake Jobs
  • A/C Repair facility

Those basic fixes will keep just about any car on the road in good working order. If you are behind on your vehicle maintenance, or if you notice a minor issue but want to avoid it turning into a major issue, let one of our general auto repair experts know about it.

Auto Electronics

Any part of general auto repair has to include on board electronics. Our professionals routinely address issues with auto electrical systems including:

  • Alternator and charging systems
  • Batteries
  • Electrical diagnosis and repair
  • Computer scanning and flashing

Suspension repair or replacement

The suspension is a part of the car that absorbs a lot of wear and tear. Even the most careful driver will eventually need to repair or replace their springs, shock absorbers and struts.  Luckily our owner has built and serviced winning race car suspension for years!

Drive-train and Drive-shaft Repair and Replacement

It makes sense that the part of the car responsible for transferring torque from the engine to the wheels will get worn down over time. As part of its full service general auto repair garage, OJ Imports can repair any drive-train and drive-shaft issue.


RX8 engines 1620510_944356492259153_1181115861709228973_n 10723533_10201944774100541_1219134973_n 294194_290281954333280_1013205595_n
These prices are for a stock rebuild on a rotary engine block. Parts used for our engine builds are mostly factory Mazda parts except for the parts most commonly recommended to upgrade from O.E such as apex seals (for performance on street/strip cars), corner button springs (as opposed to wire spring on RX7), oil control rings, and eccentric shaft oil thermostat (for better flow on cold starts). The Parts that are upgraded between RX7 and RX8 engines vary between the two, and other parts such as bearings and other components will be changed accordingly. If a core is unavailable,core charge will be added to the engine build.  All of our engines are strictly inspected up to the service limit so that we may offer a 1 year unlimited mile warranty for daily driven N/A and boosted vehicles. All though these engines will still handle some abuse for race applications; detonation, overheating, negligence and/or over boosting a non-reinforced engine (Breaking a front or rear engine plate) will not be covered under this warranty.  It is recommended that an engine intended for use in any type of racing that you use only NEW rotors, housings, and resurfaced plates! Please refer to our terms and conditions at the bottom of the main page for more info on warranties/core fee conditions/engine installation liabilities etc.
Other options to add to your rebuild
  • Engine doweling
  • Engine porting (shape and size of the intake and exhaust ports do matter as this is crucial for performance)

                                                    General Pricing Information

10836530_10202194456302440_723312435_n2004-2008 RX-8 RENESIS engines (includes 4-port 6-port and Auto 6-port)

  • $2500 + $500 core charge (if one is not available to be sent back after Rebuilt motor is installed)
  • $1500-$2500 if engine is sent in for Rebuild. (If core is completely unusable, we will sell you ours for $2500 accepting your unusable engine as the core)
  • $300 base payment is offered for engine cores offered to us for sale as a complete long block assembly (we pay shipping for these cores).
  • Engine availability varies from week to week as many orders come in, and we receive cores on a weekly basis.  Normally a 3 day turn around to get engine done from date of purchase, if longer a longer wait will occur, we will notify you at time of purchase.  SHIPPING IS NOT INCLUDED ON ANY OF OUR PRICING ON THIS PAGE UNLESS STATED! CALL US FOR A SHIPPING QUOTE.


RX-7 ENGINES – Please call for pricing as availability of these engine varies.

  • Street Port- $350
  • Monster Street Port- $500
  • Monster Street Port / Polish – $800
  • Monster Street Port / Polish / Flow – $1225
  • Bridge Port- $875 (Half bridge)
  • Bridge Port / Polish – $1200 (Half Bridge)
  • Bridge Port / Polish / Flow – $1675 (Half Bridge)
  • End and intermediate plate resurfacing – $100 ea. end $150 ea. Intermediate


Engine Rebuild Prices- Engine rebuild price is assuming that engine core has good serviceable engine plates, rotors, housings, eccentric shaft, bearings, Stationary gears, oil pump, thrust washers/spacers and oil pan/front cover etc. (If any parts are requested/recommended NEW upon order, Prices will rise accordingly and be explained to customer in detail at time of purchase/payment.)


10A- Call for pricing
12A (79-85)- Call for pricing
13B (GSL-SE 84-85)- Call for pricing
13B (86-88 N/A)- $1575
13BT (86-88)- $1575
13B (89-91 N/A)- $1575
13BT (89-91)-$1575
13B REW (93-95)- $1575
13B RENESIS (RX8 04-present)- $1500
These prices do not include shipping if necessary.  Call for Pricing on JDM engines such as 2-Rotor and 3-Rotor Cosmo






Street Port $350
Monster Street Port $500
Monster Street Port/Polish/Flow $1,225
Half Bridge Port $875
Half Bridge Port/Polish $1200
Half Bridge Port/Polish/Flow $1675
3mm rotor machining $325 ea.
Engine Reinforcement $650
Engine Balancing $225








This is a write up done by Kurt Robertson MAZDA, and is a perfect explanation for all Rotary installations!






The Mazda Rotary Engine is a very durable design if set up properly. Unfortunately if attention to detail is not done upon startup a perfectly serviceable engine (used) or a very valuable investment (rebuilt) engine can be damaged or even destroyed upon startup.

The engines built today seldom are installed by professionals and dealers, independents and enthusiasts all pose a risk of compromising the rotary within minutes, hours, days or weeks after startup if they are not aware of some very basic practices


The first rule in the install will be “you’re engine is only as good as its’ weakest point” or accessory. The second rule in your install will be, “think and plan ahead”. The third rule will be patience in troubleshooting and break in.


#1.WEAK POINTS  Even a used engine installation is quite an investment requiring a new water pump, radiator, radiator and heater hoses, belts, spark plugs, wire set and fuel filter and depending on configuration it may require fuel injectors and grommets, clutch assembly, turbo , coils and/or distributor cap and rotor.


Ask yourself, What if you put a $2000 engine into a chassis with a $4.00 heater hose that leaks. Or if you put a $3000 engine into a RX8 with old coils. . . well?


And what about engine life? usually the difference between a engine that goes 60K miles and 100K can often be linked to a lack of investment into a new radiator or accessories.


Let’s not forget to talk about the most neglected part left in a chassis, the oil cooler. What makes us think that we can have a catastrophic internally lubricated part fail in our last engine, with the old failed engine putting metallic material into the entire system and leave the oil cooler full of the previous engines failed particulates. You wouldn’t put sand in your oil filter for your new engine, but the oil cooler . . . . . . . it’ll be alright!


Your install is only as good as its’ weakest point!




  1. Battery is fully charged and is capable of 700 CCA minimum
  2. Starter is capable of 250 RPM
  3. Cooling system is topped of and holds 11-12 psi
  4. Gallon of coolant is ready for top off upon firing and after thermostat opens
  5. Spark plugs are out
  6. Ignition disabled
  7. Oil is full
  8. Crank the engine- during cranking the entire oiling system needs to undergo a visual inspection for leaks
  9. Audible verify compression- simultaneously
  10. Enable ignition and install start up plugs
  11. Timing has been statically verified and timing light has been connected to L1.
  12. Oil up chambers, ½ pint in both front and rear chambers
  13. Fuel is being delivered, is fresh and proper pressure, Fuel system is previously known to provide no drive ability problems (don’t try to dial in a newly jetted side draft on a new engine)
  14. Have second person (throttle man) start engine and hold at 3000 RPM for 2 minutes
  15. Throttle man to verify and monitor oil pressure
  16. Look under car for leaks first 10-30 seconds.
  17. Top off radiator
  18.  Throttle man @ minute 3-4 gradually lower RPMs to 2000
  19. When thermostat opens fill radiator again and seal with cap
  20. Set ignition timing
  21. Check car for coolant and oil leaks
  22. Continuously verify gauges
  23. Road test for 20-50 miles
  24. After returning to shop shut car off , let sit 10 minutes and verify restart



#3.  TROUBLE SHOOTING. Rotary engines go thru many changes within the first  500- 1000 miles or 10- 40 hours of initial start up.


A-IDLE : Set a high idle , RX8s have no Idle adjustments, so keep your idle up by using the accelerator. Do not let drop below 1200 rpm during the first 100 miles. This will help facilitate a smooth seating of all the seals in opposed to a labored 800-900 rpm which foster and develop detrimental internal wear patterns.


B- TIMING: We recommend that you initially set the car between the factory trailing and leading specs or slightly retarded to enable better start up as well as to eliminate any possibility of detonation. Again RX8s change their own timing settings. Once broke in, setting your timing for optimal performance will be setting trailing at the leading spec and the leading advanced 8-10 degrees


C –HARD START: Drive, often the hard start will disappear as the hard parts seat into the housings. During your break in it is not uncommon for the high idle to increase and change as much as 1-200 rpm per 50 miles a couple times, bring tools to lower idle as necessary , but still keep a high idle at 1200-1500 rpm


D- BAD FUEL ECONOMY- Rebuilt engines often yield very bad mileage the first 1500 miles, don’t be alarmed, this condition often clears up without any adjustments


E- HIGH OIL CONSUMPTION- It is common for all rotary engines to occasionally go thru periods where they use over a quart of oil in 500 miles, be aware of this and that this is not a normal ongoing condition


F-DIED AND WONT RESTART HOT – Rotary engines are Lipophilic (oil loving). Induce a ½ pint of heavy motor oil 30W or ATF into both the front and rear chambers. This will raise compression and often results in a restart. In the 1969-85 cars put the oil directly down each primary. The 1986-1991 cars have two nipples placed directly into the primary plenum for this from the factory, The 2004-2012 cars also have two nipples in the primary runners on the passenger side. These ports have  rubber plugs on them.



G- COMPRESSION- A compression test can be done after initial startup but will produce low numbers unless 100-200 miles have been put on the engine. A engine that has not been fired will often produce very disappointing numbers due to wash down, startup procedures, unseated seals and cranking speed.


H- 500 MILE SERVICE- This may be done any time before 1000 miles. Drain the oil into a clean wide and shallow drain pan and inspect. The darkened oil should possess a slight gold shimmer. Small and large flakes and or chunks are not normal and are indications of an impending failure. Gold shimmer, red rag material, silicone, gasket material and light sludge are what are normal and need to be removed by discarding this break in oil and refilling it with 10/40W  between 500-1000miles


I-CONSISTENCY- Whether it is a good run during the first 500 miles, or an attention to clearing codes and wiping RAM (random access memory) be consistent. The norm in rotary engines is to throw the baby out with the bath water. A techie will often condemn a block and a motor head will often blame the computer, fuel or ignition system. It can often be both or neither, but cannot be concluded until a good basic startup and break in has been performed.


J- ELECTRONICS- “Mazda States in their FWM” – This is not a perfect product and neither is an EFI system. In a controlled laboratory setting a technician will often have the task of performing something multiple times. Residual voltages, induced milliamps, spikes and such, will very often create fault codes. Clear the DTCs (diagnostic trouble code) start the car and read pending codes (real root problems). Do it again, 2 out of 3, 3 out of 5 and yes even 5 out of 7! Wash your hands, use a note pad and do your electronics work as an “electrical worker”. Now with all that said make sure the “mechanic” in you plugged everything properly and give the harness a good old fashioned wiggle test just in case.


K-WASHED DOWN- If the fuel system is supplying too much fuel and creating a rich condition it will often times drop the compression. It may drop the compression to a value below an acceptable range. Consistent cranking on a washed down engine will cause excessive wear due to the poor lubricating qualities of gas.


L-REALITY- I have owned and driven cars for years that were so cantankerous to break in I felt like torching them and walking away. Many times after a few days of work I had a very stable vehicle. Some of these cars ran like crud for 1200 miles/40 hours and then settled down, ran great and provided many years and 80K miles of enjoyment.

Not a week goes by where I don’t have someone say” I have a rotary car with a new engine in it that nobody can get running”.



M- CRANKING SPEED- Mazda has always known that a weak area of their rotary product is start up. In the 1969-70 R-100 the cars were extremely hard to start right off the show room floor. These and the 1970-1973 RX2 and RX3s had a starter the size of one third of the engine. They weighed in at 30 pounds, had a gear reduction and sat on top of the motor for easy access. The 2004 RX8 underwent a upgraded starter shortly after bring introduced. They went from a unit that spun at 180 rpm to a unit that would turn the engine at 220-250 depending on battery. If you are experiencing a hard start look closely at your starter options- for the amount of teeth and KW power have changed throughout all the models for all years.



N- CONCLUSION- Thru out rotary car production, Rotary Engines have been plagued with no public education, constant design changes in production and a hyper sensitivity to ignition and fuel variances. The goal of this installation pamphlet was to help inform you of  a few of the many variables which can and often do discourage a rotary owner.


O- TRAINING – Due to a lack of rotary technicians and my 30 years of experience Kurt Robertson Enterprises has embarked on a training program offered annually in June called the Wankel Workshop.

This is not just an event or drive in, but much more. It includes a 8- hour formal training class , a 8-hour hands on training and product updates. Offered in order to preserve and educated the future use of these very unique designs, enrollment is limited.

Contact us on the web or phone Roberta Robertson at 503-349-9194 for more information on this training.








Diagnostic Services

We take care for your vehicle

Is your vehicle just not feeling like it use to, or just acting weird? Was your warning light on your dashboard blinking yesterday and now it is just on? Bring it by OJ Imports and let us diagnose it today!


Will scan your computer for free of any charges, breakdown the issue or issues for you and then schedule everything accordingly. Today’s vehicles do have complex inter-related systems, hence on-board computers continuously monitoring and storing information concerning the performance of these systems. A warning light comes on because the computer has sensed a signal from one of the many systems or components that has gone outside of its normal operating specifications.

So many different warning lights these days do you know why yours is on? Come by and we will check it out in most cases for free. Diagnostics are usually handled at an hourly rate that is specific to the issue at hand at most auto repair shops. We typically include most diagnostics for free of any charges with any of our services. We typically do not require an appointment, but you can give us a call to schedule accordingly.

List of Services:

  • $75 Diagnostic Fee
  • $75 per hour labor rate
  • $35 for coolant pressure test
  • We do not charge diagnostic fee when it is visual or audible inspection.
    Example: suspension, brakes , oil leaks, noises, steering, etc.