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Tempest Aviation Spark Plug UREM40E

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Overview

MASSIVE ELECTRODE SPARK PLUG

Aviation Spark Plug With the most automated manufacturing processes and the most innovative spark plug in the aviation industry. Made in USA.

High Conductivity Copper Core Center Electrode copper, co-extruded inside a nickel alloy sleeve ensures outstanding heat and electrical conductivity while the nickel sleeve offers high resistance to corrosive combustion gases.

High Alumina Ceramic Insulator high mechanical strength, superior dielectric properties, proprietary protective glaze, provides high performance to conquer severe operational conditions. "Clean Collar" massive electrode "V" tip focuses heat to reduce fouling and enhance heat range control.

Proprietary Glass Center Seal 21st century 'fired in' resistor replaces the multipart screw, spring, carbon pile stack up used in competitive plugs and known to suffer from resistance value instability that can cause misfires, wasted fuel, engine roughness.

Nickel Finish environmentally preferable electrolytic nickel provides outstanding durable finish, superior corrosion protection, and extreme wear resistance.

Nickel Ground Electrodes aviation grade nickel electrode design focuses on minimizing sparking voltage requirements while maintaining specification gaps to ensure large, stable 'flame kernels' for on-time ignition and complete combustion.

Vacuum Infused Center Electrode proprietary, vacuum infusion process seals electrode/insulator gap providing stable heat range and superior center electrode cooling (heat flow to the insulator).

Hot-Lock Assembly intense pressure and heat create positive, zero-leakage, shrunk in seal between insulator and shell to contain the hot, high pressure combustion cycle gases.

Harness Wire Contact smooth, uninterrupted, oxide treated spring contact surface offers enhanced corrosion resistance, is chemically bonded to the fired-in resistor providing the ultimate harness/spark plug termination integrity and energy transfer.

Application Guide

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Reviews

like these better than champion

Jason B Verified Purchase

TEMPEST SPARK PLUG UREM40E

November 23, 2022

It works

Tracey M Verified Purchase

TEMPEST SPARK PLUG UREM40E

October 18, 2022

Carlton R Verified Purchase

TEMPEST PLUG UREM40E 12 PK

October 11, 2022

They spark great, I feel fortunate to have gotten them.

William S Verified Purchase

TEMPEST SPARK PLUG UREM40E

September 24, 2022

A good, basic, hard to find at the moment product essential for every engine. Buy some to have in stock due to shortage and supply line issues.

Peg B Verified Purchase

TEMPEST SPARK PLUG UREM40E

May 31, 2022

Very good spark plugs, been installing them for years now

Carrizozo A Verified Purchase

TEMPEST SPARK PLUG UREM40E

April 12, 2022

These Tempest plugs were ordered as replacements for my current plugs which are getting worn. The current batch has given me flawless service

Art H Verified Purchase

TEMPEST PLUG UREM40E 12 PK

February 5, 2022

So far, so good. Nicer finish than Champion.

William S Verified Purchase

TEMPEST PLUG UREM40E 12 PK

January 27, 2022

Great product with good pricing.

Washington P Verified Purchase

TEMPEST SPARK PLUG UREM40E

December 16, 2021

One spark plug was unusable out of the package. The threads were distorted.

A&p S Verified Purchase

TEMPEST SPARK PLUG UREM40E

October 21, 2021

Q&A

Please note, Pilotshop's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Pilotshop assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.

Q: Does Tempest provide the copper gasket on the UREM40E? Or purchased separately?

Each Tempest spark plug will come with one copper gasket. Any additional gaskets must be purchased separately.

Q: Is the Tempest UREM40E the equivalent of the Champion REM40E? I hope so as I have just ordered 8 UREM40E's?

Yes, the Tempest UREM40E is a direct replacement for the Champion REM40E. Both with work in the same applications.

Q: What size copper gasket is required with the Tempest UREM40E plugs, 14 or 18mm?

18mm

Q: The Champion chart calls for a REM40E in a Continental W-670 while Tempest calls for a UREM38E. Why does Tempest call for a colder plug in the same application?

The heat ranges actually overlap each other. You can use either one.

Q: What size is the UREM40E? 5/8 or 3/4 ?

5/8 inch.

Q: Is a fine-wire plug available for the UREM-40E?

UREM38S is the fine wire version of UREM40E.

Q: Does the Tempest UREM40E gap come pre-set?

Yes, these will come pre-gapped within a certain range. The end user will need to verify with their application on what gap they are actually needing. The massive plugs are gapped .016" to .021" and the fine wire are .017 to .021".

Q: Are Tempest UREM40E spark plugs identical in dimensions as the Champion REM40E? The cowling has bump outs for the spark plugs so the dimensions are critical for proper clearance.

Yes, the physical dimensions are the same for both brand plugs.

Q: Are these Tempest UREM40E plugs considered "Long reach" spark plugs?

These are not. UREM37BY would be considered long reach.

Q: Are all the Tempest spark plugs direct replacements for the Champion plugs minus the leading U on the part number. ( is a UREM38E, a direcct replacemet for the Champion #REM38E?)

Yes, they are equivalent applications and interchangeable.