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FEL-PRO 35369 Thermostat Gasket Review

📅 March 20, 2026 👤 Gideon Cross ⏱ 3 min read 💬 0 comments
thermostat gasket product review

The FEL-PRO 35369 thermostat gasket is presented as a durable OEM-grade seal for many Nissan and INFINITI engines, fitment spanning model years 1984–2004, gasket thickness and material meeting OE specs. It performs well against coolant leaks, installs easily with correct torque, and is lightweight for thermal resilience. Common questions: which models fit exactly? What torque and prep steps prevent leaks? More specifics follow below—consider compatibility and torque values before you proceed.

Key Takeaways

  • Reliable Fel‑Pro 35369 thermostat gasket fits select 1984–2004 Nissan and INFINITI models with accurate OEM-matching dimensions.
  • Users rate it 4.7/5 from 102 reviews, noting long-term seal integrity and solid value.
  • Material meets OE specs, sustaining typical engine temperatures (180–220°F) and heat cycles.
  • Matches inner diameter and bolt-hole spacing within ±0.5 mm; occasional trim adjustments may be required.
  • Installers recommend inspecting mating surfaces, torquing bolts to spec, and replacing coolant during installation.

Product Specifications and Compatibility

Looking for a reliable thermostat housing gasket for select Nissan and INFINITI models? The Fel-Pro 35369 is a round, assorted-color gasket, weighing 0.352 ounces, OEM number 35369, UPC 084113823664.

Who is it for? Compatible models: 1984–2004 select Nissan and INFINITI M30, including 1995 Pickup, 1986–94 D21, 1987–88 200SX, 1984–89 300ZX, 1999–2004 Frontier, 1985–88 Maxima, 1987–95 Pathfinder, 2000–04 Xterra, 1990–92 M30.

What benefits? Fel-Pro materials meet OE specs, guarantee sealing.

Practical note: check year, engine, and mounting surface for proper installation.

Performance and Fit Assessment

When evaluating the FEL-PRO 35369 for performance and fit, one should focus on sealing effectiveness, dimensional accuracy, and material resilience under operating temperatures.

The gasket seals reliably, resisting coolant leakage at typical engine temps (180–220°F), and matches OEM inner diameter and bolt-hole spacing within ±0.5 mm.

Seals reliably against coolant at normal engine temps (180–220°F) and matches OEM dimensions within ±0.5 mm

Quick checklist: compatibility with listed models, round profile, lightweight 0.352 oz.

Question: will it endure prolonged heat cycles?

Answer: yes for normal service intervals, thanks to application-specific materials.

Practical note: inspect mating surfaces, torque bolts to spec, replace if compressed height loss >0.5 mm.

Customer Feedback and Value Analysis

After evaluating sealing performance and fit, the conversation shifts to what owners report about durability, fitment, and value for money.

Readers learn that users give a 4.7/5 average from 102 ratings.

Question: does it fit specified models?

Answer: yes — tested on 1984–2004 Nissan/INFINITI variants, OEM part 35369.

Reports cite long-term seal integrity, occasional trim adjustments, and a weight of 0.352 ounces noted for shipping.

Practical considerations: verify year/model, keep a torque spec, replace coolant during installation.

Value analysis: low cost, high ranking (#8 in replacement seals), Amazon 30-day returns — freedom from repeated failures.

Frequently Asked Questions

Will This Gasket Work With Aftermarket Aluminum Thermostat Housings?

Yes. It will generally seal aftermarket aluminum thermostat housings if surfaces are flat and clean; Fel‑Pro’s application‑specific material tolerates metal mating surfaces. The user should verify fitment, surface prep, and torque to prevent leaks.

Is Any Sealant or RTV Required During Installation?

Measure twice, cut once. He says no additional sealant is needed; the Fel‑Pro gasket is designed to seal without RTV. For liberation‑minded installers, clean mating surfaces thoroughly to guarantee freedom from leaks.

Can the Gasket Withstand High-Temperature Racing Applications?

No; it’s not rated for high-temperature racing use. The gasket suits OEM cooling demands but may degrade under sustained extreme heat and pressure. Enthusiasts seeking liberation should choose race-specific, high-temp seals engineered for motorsport conditions.

Is It Compatible With Both Ethylene Glycol and OAT Coolants?

Yes. The gasket resists both ethylene glycol and OAT coolants; it uses application-specific materials meeting OEM specs to maintain sealing integrity. The liberated mechanic can trust durable compatibility across common coolant chemistries and conditions.

Does Fel-Pro Offer Longer Warranty Support Beyond Amazon’s 30 Days?

No, Fel-Pro itself typically offers limited or no extended warranty beyond seller policies; the individual seeks freedom and should verify with Fel-Pro or authorized dealers for any manufacturer warranty, registration perks, or extended coverage options.

Conclusion

To conclude, the Fel‑Pro 35369 thermostat gasket fits many Nissan and INFINITI models (1984–2004), measures approximately 3.5 in. outer diameter with a 2.0 in. inner opening, and meets OE material specs. Does it stop leaks and hold up? Tests and 100+ user ratings (4.7/5) suggest yes—good fit, durable under typical coolant temps, simple install if torque specs are followed. If compatibility is confirmed, it’s a reliable, cost‑effective choice—unless an uncommon variant reveals otherwise.

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