Chevrolet Blazer Engine Mount Guide: 1969-1988 Models
Stop excessive engine vibration and clunking by choosing the right new engine mounts for your classic K5 Blazer.
- For 1969 V8 models, verify you have updated, interlocking safety-style mounts due to a historical recall.
- Choose polyurethane mounts (like Energy Suspension) for off-road, towing, or high-performance use for superior durability.
- Always replace engine mounts in pairs and consider replacing the transmission mount at the same time for best results.
- When replacing mounts, inspect the frame crossmember for cracks, a known issue on these trucks.
Is Your Blazer's Engine Shaking or Clunking? It Could Be the Mounts
The engine mounts on your 1969-1988 Chevrolet Blazer work hard to keep your ride smooth and stable. Over time, the rubber in the mounts can dry out, crack, or get soft from oil leaks. When this happens, the engine can move too much, causing noise and vibrations you can feel in the cab. Replacing them restores stability and makes your truck feel solid again.
Historical Recall for 1969 Models
A major recall was issued by GM in 1971 for many 1965-1969 V8 models, including the Blazer. The original engine mounts could fail, allowing the engine to lift and cause the throttle to stick open. If you own a 1969 model with a V8, it is critical to inspect your mounts and ensure they are the updated, interlocking safety style or a modern equivalent.
Symptoms of a Bad Engine Mount
Worn-out engine mounts will give you clear warning signs. Here’s what to look and listen for:
- Excessive Vibration: You'll feel a lot of shaking in the steering wheel, floor, or seats, especially when the truck is idling in drive.
- Loud Noises: Hearing a “clunk” or “thump” from the engine bay when you accelerate, shift gears, or turn the engine off is a common sign. This is the sound of the engine moving and hitting other parts.
- Visible Engine Movement: Have a friend watch the engine while you have the truck in drive with the brake held firmly. If you lightly press the gas and the engine lifts up or shifts noticeably, a mount has likely failed.
Choosing the Right Aftermarket Engine Mount
For a classic vehicle like the 1969-1988 Blazer, aftermarket parts are the most common choice. You have two main options: standard rubber or performance polyurethane.
Tier 1: Standard Rubber Mounts
Brands: Anchor, DEA, Westar, Pioneer
These are direct replacements for the original factory mounts and are the most affordable option. They are designed to provide a smooth, quiet ride just like the originals. However, online forums show that the quality of these budget-friendly brands can be inconsistent. Some owners report they fail much faster than the originals. Pioneer is sometimes mentioned as having a slightly better finish than other value brands. These are best for stock vehicles with light, daily-driver use.
Tier 2: Polyurethane Mounts
Brands: Energy Suspension
Polyurethane is a much stronger material than rubber. Energy Suspension is a well-known brand that offers polyurethane mounts for the K5 Blazer. These are an excellent upgrade for trucks used for off-roading, towing, or that have high-performance engines. They are highly resistant to oil and chemicals that can destroy rubber mounts. The trade-off can sometimes be a slight increase in felt vibration, but many K5 owners find the added durability is worth it.
Pro Tip: Check Your Shells
Some polyurethane mounts from brands like Energy Suspension are inserts designed to fit into the original metal mount shells. Forum users have noted that some cheap aftermarket rubber mounts use a stamped metal shell that is not compatible with these inserts. If you plan to use poly inserts, make sure you have good-quality original or aftermarket shells.
| Part Tier | Brands | Price Range (Per Mount) |
|---|---|---|
| Standard Replacement (Rubber) | Anchor, DEA, Westar, Pioneer | $14 - $30 |
| Performance Upgrade (Polyurethane) | Energy Suspension | $35 - $55 |
Note: Prices are estimates and can vary by retailer and specific part number.
Frequently Asked Questions (FAQ)
How many engine mounts does my Blazer have?
Your 1969-1988 Blazer has two engine mounts, one on each side of the engine. It also has one transmission mount at the back of the transmission. It is highly recommended to replace the transmission mount at the same time as the engine mounts.
Should I choose rubber or polyurethane mounts?
If your Blazer is a stock daily driver and you want the quietest ride, standard rubber mounts are a good, affordable choice. If you use your truck for off-roading, towing, or have a modified engine, polyurethane mounts from a brand like Energy Suspension will provide much better durability and control over engine movement.
Is it hard to replace engine mounts myself?
Replacing the engine mounts is a job that a DIYer with the right tools can do. It requires safely supporting the engine with a floor jack and a block of wood, then unbolting the old mounts and installing the new ones. It's important to work safely and have a helper if possible.
Are there any other problems I should look for?
Yes. On these older trucks, inspect the engine crossmember where the mounts attach to the frame. Some owners have reported finding cracks in the crossmember, especially on the passenger side, after years of heavy use. Also, fix any engine oil leaks before installing new mounts, as oil will soften and destroy the new rubber.
Technical Specifications
Most 1969-1988 Blazers use a two-bolt or three-bolt clam-shell style mount that bolts to the engine block and the frame's engine crossmember. Polyurethane replacements are often sold as inserts for the original metal shells.
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The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- 🛍️ Shop This Part
- Is Your Blazer's Engine Shaking or Clunking? It Could Be the Mounts
- Historical Recall for 1969 Models
- Symptoms of a Bad Engine Mount
- Choosing the Right Aftermarket Engine Mount
- Tier 1: Standard Rubber Mounts
- Tier 2: Polyurethane Mounts
- Pro Tip: Check Your Shells
- Frequently Asked Questions (FAQ)
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