ACDelco RC98 Radiator Cap
(15 PSI)
Price as of 2026-06-21. Check Amazon for the current price.
Quick Decision
Price Intelligence
- Budget:$4–$9
- Mid-range:$9–$13← You are here
- Premium:$13+
Is This Right For You?
- •Those who want a top-rated option — in the top 4% of caps by rating
- •ACDelco loyalists — the brand spans 46 products in our database
- •DSkoiph 19106-RNA-A48 Radiator Coolant Reservoir Overflow — 43% cheaper at $6 (Score A)
- •Ford Genuine F3AZ-6766-B Oil Cap — higher rated at 4.8/5 ($11)
📊 Based on data analysis of 192 products in this category.
Mubboo Score: B+
How we calculate the Mubboo Score
Quality (45%): customer rating, normalized to a 10-point scale
Popularity (35%): review volume vs the category leader, log-scaled
Value (20%): price position vs other caps
Computed from live Amazon rating, review count, and price across 192 caps available to US consumers · last refreshed 2026-06-21.
How It Compares
This Product ACDelco RC98 Radiator Cap | Most Popular ROVIKE Fuel Cap | Best Rated Ford Genuine F3AZ-6766-B Oil Cap | Best Value DSkoiph 19106-RNA-A48 Radiator Coolant Reservoir Overflow | |
|---|---|---|---|---|
| Price | $10.47 | $7.87 | $11.21 | $5.99 |
| Rating | 4.7/5 | 4.4/5 | 4.8/5 | 4.6/5 |
| Reviews | 2,192 | 11,988 | 1,438 | 1,058 |
| Mubboo Score | B+ | A+ | A- | A |
What People Say
Synthesized from 40 reviews · 100% verified purchases.
Ensure exact fit by checking vehicle compatibility charts, as some caps may not seal properly and could trigger the check engine light. Compare prices locally, and verify if tether attachment meets your needs.
- Easy installation and perfect fit
- Resolves check engine light or EVAP error codes
- Secure seal and contamination prevention
- Good value for money
- Durable construction
- Inconsistent fit across vehicle models
- Sealing issues causing check engine light to stay on
- Tether piece may not attach properly
- Price may be higher than local stores
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About ACDelco
- 46 products in our database
- Average rating: 4.7/5 across all products
- Price range: $4.27 – $181.99
- Categories: belts-hoses-and-pulleys-automotive, caps, Car Batteries, electrical-system-tools, engine-cooling-and-climate-control, engines-and-engine-parts-automotive
If not the RC98 Radiator Cap, consider these
Featured in Our Reviews
Bottom Line
ACDelco RC98 Radiator Cap earns Mubboo Score B+. Priced at $10 — a mid-range option, below the category average of $14. Rated 4.7/5 from 2,192+ reviews. Strong buy if: those who want a top-rated option, acdelco loyalists.
Frequently Asked Questions
Is the ACDelco RC98 Radiator Cap worth buying in 2026?
It earns a Mubboo Score of B+, with a 4.7/5 rating from 2,192 reviews — better than 96% of caps we track.
How much does the ACDelco RC98 Radiator Cap cost?
It is currently $10.47 — mid-tier pricing for caps.
How does the RC98 Radiator Cap compare to other caps?
The category's most-reviewed alternative is the ROVIKE Fuel Cap (4.4/5, 11,988 reviews, $7.87). The RC98 Radiator Cap carries a Mubboo Score of B+ vs A+.
Sources & References
Products available through US retailers. Prices in USD. Sales tax varies by state and is not included.
Mubboo may earn a commission on purchases made through affiliate links. This does not affect our Mubboo Score, product rankings, or editorial judgments. Prices are accurate as of the last sync (2026-06-21) and may change.