This page lists 12 ignition parts for the 1989 Excalibur Phaeton, across 3 part types, covering both the 5.0L 305cid V8 and the 5.7L 350cid V8. Every part shows its brand, manufacturer part number and fitment notes.
The ignition system on the 1989 Excalibur Phaeton delivers spark at the right moment — plugs, coils, wires, distributors and ignition modules. All 12 listed parts are Spark Plug (9 parts), Distributor (2 parts) and Distributor Mounting Gasket (1 part).
The 1989 Excalibur Phaeton was sold with both the 5.0L 305cid V8 and the 5.7L 350cid V8. Every part on this page is engine-specific. Each part shows which engine(s) it fits.
7 brands supply ignition parts for the 1989 Excalibur Phaeton, led by NGK (3 parts), UNITED MOTOR PRODUCTS (2 parts) and ACDELCO (2 parts), plus 4 more brands. Quality grades include Copper / Nickel, Iridium and Platinum.
A "Popular" badge means the source catalog flagged the part as frequently chosen for the 1989 Excalibur Phaeton. 2 parts have it, including NGK 6945 (Spark Plug) and ACDELCO 2 (Spark Plug). Each part number opens a page with every vehicle that part fits.
Distributor
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| UNITED MOTOR PRODUCTS Fits: 5.7L 350cid V8 | 9366 | 🇺🇸 US | Premium QualityHigh-Performance Engineered, with Aluminum Housing & Brass Cap & Rotor | View on Amazon |
| UNITED MOTOR PRODUCTS Fits: 5.7L 350cid V8 | 99366 | 🇺🇸 US | with Electronic Spark Selectionwith Vertical Distributor Cap Towers | View on Amazon |
This table covers the distributors that route spark.
UNITED MOTOR PRODUCTS supplies both parts for the 1989 Excalibur Phaeton.
Part numbers include UNITED MOTOR PRODUCTS 9366 and UNITED MOTOR PRODUCTS 99366.
Distributor Mounting Gasket
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VICTOR REINZ Fits: 5.7L 350cid V8 | 711350200 | 🇺🇸 US | Inside Diameter: 1.280 In | View on Amazon |
This table covers the gaskets that seal the Distributor Mounting. Typical signs include seepage at the joint, a burnt-oil smell, or a leak that appears only after a long drive. Clean both flanges and torque in the sequence the notes or the manual call for.
One part is listed for the 1989 Excalibur Phaeton — VICTOR REINZ 711350200.
Spark Plug
Summary: Notes include pre-set gaps of 0.035", 0.040", 0.045" and 0.060". Replacement brands in this table include NGK, ACDELCO and MOTORCRAFT.
Copper / Nickel
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| NGK Popular Fits: 5.7L 350cid V8 | 6945 | 🇺🇸 US | V-PowerPre-Set Gap: 0.060" | View on Amazon |
| ACDELCO Fits: 5.7L 350cid V8 | CR45TS | 🇺🇸 US 🇨🇦 CA | GM Original EquipmentConventional | View on Amazon |
| CHAMPION Fits: 5.7L 350cid V8 | 406 | 🇺🇸 US | Copper PlusPre-Set Gap: 0.04" | View on Amazon |
| MOTORCRAFT Fits: 5.7L 350cid V8 | SP425 | 🇺🇸 US | Copper | View on Amazon |
| MOTORCRAFT Fits: 5.7L 350cid V8 | SP425X | 🇺🇸 US | NickelSpark Plug Approximate Resistor Value: 2,000 | View on Amazon |
Iridium (lasts up to 4x longer than Copper / Nickel)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| NGK Fits: 5.7L 350cid V8 | 7559 | 🇺🇸 US | Iridium IXPre-Set Gap: 0.060" | View on Amazon |
| SKP Fits: 5.7L 350cid V8 | SP1010 | 🇺🇸 US | Tapered Ground Electrode with Platinum Chip | View on Amazon |
Platinum (lasts up to 2x longer than Copper / Nickel)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ACDELCO Popular Fits: 5.7L 350cid V8 | 2 | 🇺🇸 US 🇨🇦 CA | GoldRapidfire | View on Amazon |
| NGK Fits: 5.7L 350cid V8 | 3207 | 🇺🇸 US | G-PowerPre-Set Gap: 0.060" | View on Amazon |
This table covers the spark plugs for this engine. Typical signs include misfire under load, rough idle, or a flashing check-engine light. Verify the gap even on pre-gapped plugs, and replace coil boots that come off a high-mileage engine.
9 Spark Plug parts are listed for the 1989 Excalibur Phaeton, from NGK, ACDELCO, MOTORCRAFT and 2 other brands. NGK 6945 carries the "Popular" badge.
In the Copper / Nickel grade, MOTORCRAFT, NGK, ACDELCO and 1 other brand supply 5 parts: grouped under the catalog's "Copper / Nickel" designation — the notes column spells out what sets them apart. A representative part number is NGK 6945.
The Iridium (lasts up to 4x longer than Copper / Nickel) section lists 2 options from NGK and SKP — grouped under the catalog's "Iridium (lasts up to 4x longer than Copper / Nickel)" designation — the notes column spells out what sets them apart. NGK 7559 is listed in this group.
In the Platinum (lasts up to 2x longer than Copper / Nickel) grade, ACDELCO and NGK supply 2 parts: grouped under the catalog's "Platinum (lasts up to 2x longer than Copper / Nickel)" designation — the notes column spells out what sets them apart. A representative part number is ACDELCO 2.
Listed part numbers: NGK 6945, ACDELCO CR45TS and CHAMPION 406, plus the other parts above.
Buying Ignition Parts for a 1989 Excalibur Phaeton
On this vehicle, the ignition system delivers spark at the right moment — plugs, coils, wires, distributors and ignition modules.
- Match the engine first. Every ignition part here is engine-specific; each row shows which engine(s) it fits.
- Read the notes on each row for position, trim and spec qualifiers before you order.
- Where labor overlaps, replace plugs and wires (or coil boots) as a set — one weak cylinder makes the whole set feel bad.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: Spark Plug and Distributor .
Frequently Asked Questions
How many ignition parts fit the 1989 Excalibur Phaeton?
Our catalog currently lists 12 ignition parts for the 1989 Excalibur Phaeton across 3 subcategories and 7 brands, covering both the 5.0L 305cid V8 and the 5.7L 350cid V8. Each part is matched to the engine(s) it fits.
Do ignition parts differ between 1989 Excalibur Phaeton engines?
Yes. Every ignition part on this page is engine-specific. Each row shows which engine(s) it fits — use the filter at the top to hide the rest. If you're unsure which engine you have, check the emissions label under the hood or the 8th character of your VIN.
What are the signs of ignition problems on a 1989 Excalibur Phaeton?
Common symptoms include misfires under load, rough idle, flashing check-engine light, or poor starting in damp weather. If you notice any of these, identify the affected subcategory above and cross-reference the part numbers listed.
What spark-plug gap is listed for the 1989 Excalibur Phaeton?
Notes on this page include pre-set gaps of 0.035", 0.040", 0.045" and 0.060". Still verify against spec — even “pre-gapped” plugs should be checked before they go in.
What should I replace at the same time?
Where labor overlaps, replace plugs and wires (or coil boots) as a set — one weak cylinder makes the whole set feel bad.
What do the market flags (US, CA, MX) on each part mean?
They show the market for which the manufacturer published application data for that part — where the vehicle was first sold, not where the part was made. If your 1989 Excalibur Phaeton was originally sold in the US, the safest choice is a part marked for the US market.
How do I make sure a part fits my 1989 Excalibur Phaeton?
First match the engine — each row shows which engine(s) the part fits. Then gap matters even on “pre-gapped” plugs — verify against spec, and replace coil boots when they come off a high-mileage engine. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 1989 Excalibur Phaeton
Ignition Parts for Other Excalibur Phaeton Years
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