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Gmc Li3500 Distributor Felt Washers

Gmc Li3500 Distributor felt washers

Starting at low prices, AutoBuffy stocks multiple distributor felt washers from top OE-quality brands. This small oil-saturated felt pad sits at the base of the distributor shaft, lubricating the shaft bushing and preventing premature wear. When it dries out or disintegrates, the shaft wobbles, ignition timing becomes erratic, and hard-to-diagnose misfires follow.

Signs your Gmc Li3500 needs a new distributor felt washer

  • Erratic or wandering ignition timing that won't hold an adjustment
  • Engine misfires or rough idle that worsens as the engine warms up
  • Distributor shaft feels loose or has noticeable side-to-side play when checked by hand
  • Visible dry, crumbled, or missing felt material around the distributor shaft base
  • Increased distributor bushing wear, scoring, or metallic debris in the oil near the distributor
  • Intermittent spark or no-start conditions tied to distributor shaft movement under load

Which distributor felt washer should you buy for your Gmc Li3500?

The most important factors are correct outer diameter, inner bore diameter, and thickness — a washer that is even slightly undersized will not retain oil or support the shaft properly. Material density also matters: a firmer, higher-density felt holds more oil and outlasts cheaper, loosely woven alternatives.

OE-specification felt washer
Best for
Restoring a daily driver or keeping an original tune-up kit complete
What you get
Exact original dimensions, pre-oiled dense felt, correct fit without modification
High-density aftermarket felt washer
Best for
Performance builds or engines that run hot
What you get
Denser felt composition that retains lubricant longer under elevated heat and RPM
Tune-up kit with felt washer included
Best for
Full distributor service in one purchase
What you get
Felt washer bundled with cap, rotor, and points — saves separate sourcing and ensures matched service intervals
Bulk/uncut felt stock
Best for
Rebuilders or restorers needing a custom size
What you get
Raw felt sheet you cut to exact dimensions — lower cost per piece but requires precise measurement and cutting

Replacing the distributor felt washer on a Gmc Li3500

Easy⏱ 30–60 minutesDistributor hold-down wrench or socketNeedle-nose pliers or pick toolTiming lightClean engine oil for pre-soaking the new washerMarker or paint pen for alignment marks

Before removal, mark the distributor body position relative to the intake manifold and note where the rotor points so the distributor can be reinstalled in the same orientation. Pull the distributor, remove the old felt washer from the shaft base using a pick or needle-nose pliers, soak the new washer in clean engine oil, and seat it firmly in the recess. Reinstall the distributor aligned to your marks, then verify and adjust ignition timing with a timing light before returning the vehicle to service.

Frequently asked questions

How much does it cost to replace distributor felt washers on a Gmc Li3500?
The part itself starts at low prices on AutoBuffy. Because the felt washer is accessed during a standard distributor service, labor is minimal if you are already removing the distributor. DIY replacement is straightforward and keeps total cost very close to the part price alone.
How often should the distributor felt washer be replaced on a Gmc Li3500?
Replace it at every major distributor service or whenever the distributor is removed. As a general guideline, inspecting it every 30,000–50,000 miles is reasonable. If the felt appears dry, compressed, or fragmenting rather than supple and oil-saturated, replace it immediately regardless of mileage.
What happens if you run a Gmc Li3500 without a distributor felt washer?
Without the felt washer, the distributor shaft bushing runs dry and wears rapidly. This causes shaft wobble that shifts the reluctor or points gap unpredictably, leading to unstable ignition timing, misfires, and eventual scoring of the distributor housing bore — a significantly more expensive repair.
Do I need to retime the engine after replacing the distributor felt washer on a Gmc Li3500?
If the distributor is removed to access the felt washer, yes — you will need to retime the ignition after reinstallation. Mark the distributor body and intake position precisely before removal. If you access the felt washer without fully pulling the shaft, timing should not be disturbed.
Should I oil the felt washer before installing it on a Gmc Li3500?
Yes. Soak the new felt washer in clean engine oil for a few minutes before installation so it is fully saturated. Many replacement washers arrive dry. Installing a dry felt washer defeats its purpose and will accelerate shaft bushing wear from the moment the engine starts.
Is the distributor felt washer the same part as the distributor shaft bushing on a Gmc Li3500?
No. The felt washer is a separate oil-retention pad that feeds lubricant to the shaft bushing. The bushing is the metal sleeve the shaft rides in. They work together — a worn or absent felt washer will cause premature bushing failure, but they are ordered and replaced as distinct components.

More parts for your Gmc Li3500

Engine Cooling Fan Switch ConnectorSteering King Pin SetAlternator DiodeDistributor CapAuxiliary Engine Cooling Fan AssemblyAutomatic Transmission Oil Cooler HosePre Heat HoseEngine Oil Cooler Mounting Kit

Distributor felt washers for other Gmc models

Gmc I3500Gmc C25Gmc TruckGmc G1500Gmc PB3500 VanGmc PM253