1 2
  • Photo - Primary
  • Photo - Primary
  • Photo - Primary
  • User 4

DEI Radiator Relief Diesels - 16 oz.

DEI Radiator Relief Diesels - 16 oz.

DEI40204

$9.97
$9.97
Request Price Match
  • Fully secure checkout
  • Trusted by thousands
  • Rated and reviewed
Radiator ReliefÂ(TM) for Diesels supercharges your radiator by transferring heat more efficiently through the radiator. Similar to the original formula this proven coolant additive will reduce your operating temperature up to 30°F degrees and reduce engine wear that occurs during extreme heat. NEW Radiator Relief for Diesels is also formulated with a corrosion inhibitor that reduces mineral deposits. This is the first additive that maintains pH levels that otherwise fluctuate over time resulting in core damage.
Material Safety Data Sheet
Installation Instructions
Material Safety Data Sheet
MPN: 40204
⚠️ Proposition 65 Warning: This product may contain chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. Learn more »
DEI Radiator Relief Diesels - 16 oz.

$9.97

FAQ

When does my order ship?

Most orders ship in 1–3 days, but some items may take longer due to demand and manufacturing delays. For urgent orders, please contact us to confirm stock before purchasing.

Are returns accepted?

Not satisfied? Return any item within 30 days. See our FAQ page for details.

Buy now pay later options available?

Yes. Pay later in installments with Affirm or PayPal Pay Later.

Do we offer price matching?

We’re happy to price match any legitimate listing from an authorized dealer, as long as the item is in stock and the price is current. We cannot match outdated or incorrect discounts based on old MSRP, since those prices are often errors the competitor cannot honor.