D Series Performance Oil Pump Spring
This spring replaces the factory oil pressure relief spring, and has about double the spring rate. In turn, this will allow your oil pump to produce higher oil pressure at mid to high rpm, because the relief valve will open later and will open less when it does, thus wasting less oil flow. Having high oil pressure in the high rpm range can be absolutely vital for preventing engine failure and wear in performance modified engines. This is especially relevant to an engine with smaller bearing surfaces on the crankshaft and camshaft, such as D series engines.
- 2X STIFFER SPRING: The higher spring rate is more effective than the OEM spring, because it increases seat pressure, decreases the rate that the relief valve opens at, and it makes shimming twice as effective.
- SHIMS INCLUDED: You will also receive three 1 millimeter thick shims, to allow for a wide range of customization of maximum oil pressure.
- GUARANTEED FITMENT: Both the spring and shims are guaranteed to fit any D series oil pump without any modification, or your money back. This includes all D15, D16, D17 engines, as well as OEM, ACL, and other aftermarket oil pumps.
- ONE OF A KIND: As far as we have seen and researched, no aftermarket D series oil pumps include a stiffer spring, despite this being a common practice in race/performance applications. By not increasing the oil relief valve seat pressure, those high flow pumps miss out on their full potential.
- LIFETIME WARRANTY: Should your high pressure spring ever fail for any reason (not that we expect it to) it will be replaced at no expense to you.
*Note* - The spring you receive will be slightly shorter than the OEM spring. Regardless, our spring has a higher spring rate, and a higher seat pressure, even when installed with no shims. The reduction in length actually allows for easier install and maintains full range of motion of the relief valve even when excessively shimmed.
No Play Industries is a small, veteran owned & operated company, that sells custom automotive parts. We strive for honesty and intelligent engineering. Trust is important, and we wish to grant that to the customer, both in product and practice. Please feel free to contact us with any questions.