Summary
Recochem HD Expert Classic coolant data, from Recochem's own source. HD EXPERT CLASSIC Antifreeze/Coolant is a concentrate and 50/50 premix coolant listed by Recochem. The manufacturer lists 4 OEM or industry spec codes, including GM 1825M.
What to buy
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Where to buyConfirm the specification in your owner’s manual before buying. Product examples are not a fitment guarantee.
Specifications
| Brand | Recochem |
|---|---|
| Maker | Recochem |
| Product | HD EXPERT CLASSIC Antifreeze/Coolant |
| Part numbers (as published) | 86-284, 86-474, 16-284, 16-474, 16-285, 16-475, 26-289, 26-479 |
| Sizes (as published) | 1 Gallon, 3.78 L, 9.46 L, 208 L, 55 gal, 1000 L |
| Premix or concentrate | Concentrate and Premix 50/50 |
| OEM / industry specs listed | GM 1825M, Detroit Diesel 7SE298, Navistar CEMS B-1, TMC RP-329B |
| Free-of claims | phosphate-free, amine-free |
| Not published by the maker | Chemistry, Base glycol, Colour, ASTM standards, Service life claim, Freeze point, Datasheet. Check the product label or ask the manufacturer. |
| Source | manufacturer page |
| Last checked | 22 October 2026 |
Specs and approvals listed by the manufacturer
- Meets GM 1825M per Recochem (GM)
- Meets Detroit Diesel 7SE298 per Recochem (Detroit Diesel)
- Meets Navistar CEMS B-1 per Recochem (Navistar)
- Meets TMC RP-329B per Recochem (TMC (heavy-duty truck))
Manufacturer wording: CLASSIC Conventional Diesel – recommended for use where a fully formulated heavy duty diesel coolant is required
"Meets X per manufacturer" is our shorthand for any of the manufacturer's own phrases: meets, meets or exceeds, approved, or recommended for applications requiring. It is the manufacturer's claim, not an approval by Coolant.com or by the vehicle maker. Codes are copied as published. Some sources list codes for compatibility rather than formal approval. The wording above shows which.
Alternatives that list the same spec
Other coolants whose makers list at least one of the same OEM codes as HD EXPERT CLASSIC Antifreeze/Coolant. More shared codes first. Match the exact code in your manual, and do not mix chemistries when topping up.
| Product | Same code(s) |
|---|---|
| Zerex G05 Antifreeze Coolant Zerex · HOAT · Concentrate | Detroit Diesel 7SE298, GM 1825M, TMC RP-329B |
| HD EXPERT PREMIUM Antifreeze/Coolant Recochem · not published · Concentrate and Premix 50/50 | Detroit Diesel 7SE298, TMC RP-329B |
| HD Expert EXTREME Antifreeze/Coolant Recochem · OAT · Concentrate and Premix 50/50 | Detroit Diesel 7SE298, Navistar CEMS B-1 |
| Valvoline MaxLife/Multi-Vehicle Antifreeze Coolant 50/50 Valvoline · not published · Premix 50/50 | Detroit Diesel 7SE298, GM 1825M |
| Zerex Original Green Antifreeze Coolant Zerex · IAT · Concentrate | Detroit Diesel 7SE298, GM 1825M |
| Prestone Command ESI Precharged Antifreeze + Coolant Prestone · IAT · Premix 50/50 | Detroit Diesel 7SE298, Navistar CEMS B-1 |
Compatibility notes
- If your owner's manual calls for GM 1825M, Recochem lists that code for this product. Read the exact wording above, and confirm against your manual.
- Sold premixed: pour as supplied. Do not add water unless the label says to.
Where to buy
We did not find a retailer link on the manufacturer's page that we could check. Try the manufacturer's own site: Recochem product page.
Related tool
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These make pages explain what each vehicle maker specifies. The reason each one links here is shown next to it. This is not a fitment claim, so check your owner's manual.
- What coolant GM / Chevrolet specifies (the manufacturer lists a spec code from this vehicle maker)
More from Recochem
- DIGGERS OEM Premium Green Coolant
- HD Expert EXTEND Antifreeze/Coolant
- HD Expert EXTEND WB Antifreeze/Coolant
- HD EXPERT EXTRA Antifreeze/Coolant
- HD Expert EXTREME Antifreeze/Coolant
- HD EXPERT PREMIUM Antifreeze/Coolant
See every Recochem product we list, with the chemistries and spec codes the maker names, on the Recochem coolant brand page.
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