Dodge B150 Engine Valve Cover Gasket Set: A Complete Guide for 1981-1987
Stop that burning oil smell and keep your B150's engine clean with the right valve cover gasket set.
- The most common cause of leaks is old, hardened gaskets combined with warped valve covers from overtightening.
- Confirm if your B150 has a Slant-6 (1 gasket) or V8 (2 gaskets) engine before ordering.
- For a durable, reusable seal, choose a modern rubber gasket with a steel core.
- Do not overtighten the valve cover bolts; they only need to be snug. This is critical to prevent new leaks.
Is Your B150's Valve Cover Gasket Leaking?
After decades of heat and exposure to oil, the original valve cover gaskets on your 1981-1987 Dodge B150 have likely become hard, brittle, and compressed. This leads to oil leaks, which are the most common issue for this part. The problem is often made worse by the van's original stamped steel valve covers, which can warp around the bolt holes if they've been overtightened in the past, creating an uneven surface that's hard to seal. This is a very common repair for these classic Dodge vans.
Symptoms of a Failing Valve Cover Gasket
The signs of a bad valve cover gasket are hard to miss. You don't need to be a mechanic to spot them.
- Burning Oil Smell: This is the most obvious symptom. Oil leaks from the valve cover and drips directly onto the hot exhaust manifold, where it burns off, creating a distinct and unpleasant smell inside and outside the van.
- Visible Oil Leaks: You'll see fresh, wet oil stains on the side of the engine, particularly around the valve covers. Over time, this attracts a lot of dirt and grime.
- Low Engine Oil: A steady leak will cause your engine oil level to drop over time, requiring you to top it off more frequently.
- Rough Running or Misfires: On some engines, if the leak is severe, oil can seep into the spark plug tubes. This can foul the spark plugs and cause the engine to misfire or run poorly.
Check Your Engine First!
The 1981-1987 Dodge B150 was available with different engines, most commonly the 225 Slant-6 (an inline-six) and the 318 or 360 V8. A Slant-6 has one long valve cover and needs one gasket. A V8 has two valve covers and needs a set of two gaskets. Always confirm your engine type before ordering to avoid getting the wrong part.
Choosing the Right Aftermarket Gasket
For a vehicle of this age, aftermarket gaskets are the standard. OEM gaskets are likely discontinued and not necessary. The key is choosing the right material and brand for your needs. There are several types available, and Mopar owners have strong opinions on each.
Gasket Material: Cork vs. Rubber vs. Steel Core
- Good (Cork or Basic Rubber): Traditional cork gaskets are very affordable and can seal well on imperfect, as-cast surfaces if not overtightened. Basic rubber gaskets last a bit longer than cork but can also fail from age and heat. Brands like Mr. Gasket often fall into this category. They work, but may not be the most durable option.
- Better (Cork/Rubber Composite): Brands like Fel-Pro offer cork-and-rubber composite gaskets (often blue) that combine the conformability of cork with the durability of rubber. These are a solid, reliable choice for a stock daily driver. Victor Gaskets (Reinz) is another reputable OEM-level brand offering quality rubber and composite gaskets.
- Best (Steel Core Rubber): For the best possible seal and reusability, look for a modern rubber gasket with a steel core. The steel insert prevents the gasket from getting distorted when tightened and makes it much more durable. These are often reusable, which is great if you need to adjust your valves. Brands like Cometic Gasket and Edelbrock often offer these premium options, which are excellent for a leak-free, long-term repair.
Pro Tip: Flatten Your Valve Covers
Before you install your new gaskets, take your old steel valve covers and lay them on a flat surface. Check the area around each bolt hole. If they are dimpled downwards from being overtightened, use a small hammer and a block of wood to gently tap them flat again. This single step is the most important trick to getting a perfect, leak-free seal.
| Part Type | Price Range |
|---|---|
| New Aftermarket Gasket Set | $32.29 - $70.36 |
| Estimated Shop Labor | $120 - $250 |
Frequently Asked Questions (FAQ)
Is it hard to replace the valve cover gaskets on a Dodge B150?
No, this is a great job for a DIY mechanic. Access is generally good, especially after removing the engine cover ('doghouse') inside the van. The job requires basic hand tools like a socket set and a scraper. The main steps are removing the cover(s), thoroughly cleaning the old gasket material off both the cylinder head and the valve cover, and carefully installing the new gasket.
Should I use sealant on the new gaskets?
Many mechanics recommend using a thin layer of RTV sealant or weatherstrip adhesive to glue the gasket to the valve cover itself. Let it set up before installing. This holds the gasket in place during installation. It is often recommended to install the gasket dry where it meets the cylinder head, or with a very light film of grease, to make it easier to remove in the future without damaging the gasket.
Are there any recalls for the valve cover gaskets?
No. There are no recalls or Technical Service Bulletins (TSBs) from Dodge or the NHTSA for valve cover gasket issues on the 1981-1987 B150. Any leaks today are simply due to the age and normal wear of the original parts.
How tight should I tighten the valve cover bolts?
Do NOT overtighten the bolts. This is the number one cause of new leaks. The bolts only need to be snug enough to create a seal. The exact torque spec is very low (around 40-50 inch-pounds, not foot-pounds). Using a 1/4-inch drive ratchet, tighten them until they are just snug, working from the center bolts outward.
Technical Specifications
Gasket material can be cork, rubber, cork-rubber composite, or rubber with a steel core. The set will contain one gasket for Slant-6 engines or two for V8 engines.
We Have This Part in Stock
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.
- Dodge B150: