Autolite 685 spark plug for the 1975 Chevrolet Impala V8 5.7L, 6.6L or 7.4L and other vehicles fires the spark that ignites the air-fuel mixture in the cylinder. This Autolite spark plug is a copper-core design with a nickel-plated shell, engineered for quick starts.
- Copper core center electrode for thermal control and resistance to fouling
- High nickel alloy center and ground electrodes for extended life
- High alumina multi-rib ceramic insulator for thermal conductivity and insulation strength
- Nickel-plated shell that resists corrosion
- Resistor design rated at 5000 ohm
Quick facts
- Part: Autolite 685 spark plug
- Fits: 1975 Chevrolet Impala V8 5.7L, 6.6L or 7.4L and other vehicles
- Condition: New
Hard starting, a rough idle or a misfire can mean a spark plug is worn. A weak ignition wire can give the same symptoms, so those signs alone do not prove the plug is at fault.
Fits
The 1975 Chevrolet Malibu V8 5.7L and the 1975 Chevrolet Camaro V8 5.7L both fit this spark plug, which covers Camaro spark plugs for that engine, and many other vehicles fit it too. This listing is one spark plug, and the 1975 Chevrolet Malibu V8 5.7L takes eight. Open the "Vehicles it fits" section to check your exact model and engine.
Specifications
Fit and size
- Thread size: M14 - 1.25 (14 mm diameter), metric
- Hex size: 5/8 in
- Seat type: Tapered
- Pre-gap: 0.06 in (1.5 mm)
- Center electrode projection: Short projection, insulator tip projection 1 mm (0.041 in)
- Heat range: 8
Build and materials
- Type: Copper
- Center electrode core: Copper
- Electrode tips: Nickel
- Insulator: Ceramic
- Resistor type: Yes, 5000 ohm
- Terminal: Non-removable nut
- Condition: New
- Warranty: Autolite 2 year limited warranty
- Country of origin: China
In the box
One spark plug. A washer is not included.
Interchange: 41-830 · HR9ACY+ · T16R-U15 · ARF2-6 · ARF3-6 · ARF4-6 · ASF3C-6 · ASF4C-6 · BR6FS-15
R45TX · 108 · RV8C6 · 8129844 · 5030 · 19157989 · 5613846 · 5613857 · 5613869 · 5614252 · 7240 · YR55 · YR55IX
Product information is for general reference and may contain errors. See our Disclaimer.
This part cross-references / interchanges with the following part numbers:
41-830, R45TX, HR9ACY+, 108, RV8C6, 8129844, 5030, T16R-U15, 19157989, 5613846, 5613857, 5613869, 5614252, ARF2-6, ARF3-6, ARF4-6, ASF3C-6, ASF4C-6, 7240, BR6FS-15, YR55, YR55IX
Frequently Asked Questions
Are these Chevy Malibu spark plugs right for the 1975 Chevrolet Malibu V8 5.7L?
Yes, Autolite 685 fits the 1975 Chevrolet Malibu V8 5.7L, which takes eight; open the "Vehicles it fits" section to check another model or engine.
Is the Autolite 685 a Chevy Impala spark plug for the 1975 Chevrolet Impala V8 5.7L, 6.6L or 7.4L?
Yes. Autolite 685 fits the 1975 Chevrolet Impala with the V8 5.7L, 6.6L or 7.4L engine, and each of those engines takes eight.
What gap and thread size does the Autolite 685 spark plug have?
This spark plug comes pre-gapped at 0.06 in (1.5 mm), with an M14 - 1.25 thread, a 5/8 in hex and a tapered seat. The heat range is 8.
Does this spark plug come with a washer?
No. This listing is one spark plug, and a washer is not included.
Which metals are used in the electrodes of this copper spark plug?
The center electrode has a copper core, and the center and ground electrodes use a high nickel alloy. The shell is nickel-plated and the insulator is ceramic.
