Do Fel Pro Gaskets need sealant?

Asked By: Mckinley Agadjanoff | Last Updated: 19th January, 2020
Category: automotive auto shows
4.5/5 (876 Views . 22 Votes)
Fel-Pro, ASE Certified Master Technician, John Gurnig provides examples why most Fel-Pro gaskets do not require the use of sealant. In certain cases, however, it is required when mating gaskets or filling gaps.

Click to see full answer


In this regard, do intake gaskets need sealant?

Equally important, the intake manifold and head surfaces must be clean (no grease, oil or coolant film) and dry. RTV, other sealants or adhesives should not be used around the coolant or intake ports on carrier-style gaskets. New intake manifold bolts are recommended.

Subsequently, question is, do you use sealant on cork gaskets? Number 2 sealants work best on cork gaskets or paper oil pan gaskets. They are often used on neoprene transmission pan gaskets as well. Aviation form-a-gasket has the advantage of being brushable, so you can lay on a thin or thick coat to seal metal flanges, machined surfaces and solid gaskets.

In this way, are Fel Pro Gaskets any good?

Yes they are good quality. I've used a Fel-Pro stock type head gasket in my Civic twice with no problem. Once when the original gasket blew, second time I needed to remove head and replace a burnt valve.

What is the best sealant for intake manifold?

The Best Gasket Sealer

  1. ATP Automotive Re-Seal Stops Leaks.
  2. Permatex 81160 High-Temp Red Silicone Gasket.
  3. BlueDevil Products Head Gasket Sealer.
  4. 3M Ultrapro Black High Temp Silicone Gasket Tube.
  5. Permatex 80019 Aviation Form-A-Gasket No.
  6. Gasgacinch 440-A Gasket Sealer and Belt Dressing.
  7. Edelbrock 9300 Gasgacinch Gasket Sealer.

27 Related Question Answers Found

How do you stop a intake manifold gasket from leaking?

According to its maker, Bar's Leaks Liquid Copper Block Seal Intake & Radiator Stop Leak has been specifically designed to chemically repair leaks in the intake manifold and intake manifold gasket, as well as other major cooling system leaks.

Can I use gasket maker instead of a gasket?

It is fine to use the correct RTV sealant instead of a gasket if used in the right application (oil, high temp, fuel). Not, however, if the gasket thickness is required to produce a specific amount of clearance. RTV sealant is better than primitive gaskets in most applications ie.

How much does it cost to replace an intake gasket?

The average cost for an intake manifold gasket replacement is between $427 and $558. Labor costs are estimated between $334 and $423 while parts are priced between $93 and $135. Estimate does not include taxes and fees.

Should you use RTV with a rubber gasket?

Using RTV on the gaskets with fluoroelastomer coating or silicone sealing beads causes multiple issues: The sealer can chemically attack the rubber sealing beads and degrade them. RTV can act as a lubricant and cause the rubber gasket to slip out of place and split, creating an opportunity for leaks.

How do I know if my intake manifold gasket is leaking?


Another symptom of a faulty intake manifold gasket is coolant leaks. Some intake manifold gaskets also seal engine coolant, and if the gasket wears out it may lead to a coolant leak. This may produce a distinct coolant smell, along with steam, and drips or puddles of coolant underneath the vehicle.

Do metal gaskets need sealant?

Metal/Plastic Carrier Gaskets
Sealants can act as a lubricant and cause the rubber gasket to slip out of place and split. Most replacement gasket manufacturers will include instructions for installation that will outline if sealants need to be applied. Surface Finish: The sealing surfaces should be dry and clean.

Should you grease gaskets?

A smear of grease generally won't hurt and will hold the paper in place during assembly. Sometimes cheap pattern gaskets are very thin compared to original, either make your own using the right thickness gasket material or add the thinnest smear of sealant. Sometimes sealant will help with damaged surfaces.

Do you put sealant on valve cover gaskets?

Although valve cover gaskets don't necessarily need sealers or cements, it's a common practice to glue the gasket to the valve cover. There are a number of sealant choices, too. For this application, Permatex No. 1, RTVs or Permatex High Tack gasket sealant work well.

Which way do Fel Pro intake gaskets go?

When installing Fel-Pro exhaust manifold gaskets, if there is a smooth, metallic side and a composite side, the metallic side should be installed facing out, meaning toward the exhaust manifold.

What are Fel Pro gaskets made of?


Fel-Pro ® Performance MLS gaskets are composed of four to five stainless steel layers, along with proprietary polymer coatings. Strategically located sealing beads surround the combustion chamber and coolant passages, concentrating clamp load in those areas where it is most critical.

How long does it take for gasket sealer to dry?

Anaerobic flange sealants and gasket makers need about an hour to cure. Solvent-based flange sealants need to air-dry before they can be reassembled, and then they need another 10 minutes to dry before re-checking torque.

How do you soften cork gasket?

It used to be common practice to soak a dried-out cork gasket in hot water for a time to soften it and restore some flexibility before installation, but I don't recall ever oil-soaking one. Rope seals for crankshafts got the oil soak treatment pretty regularly.

What is the best RTV sealant?

Best Sellers in Gasket Sealers
  • #1.
  • Permatex 81160 High-Temp Red RTV Silicone Gasket, 3 oz.
  • Permatex 81878 Ultra Copper Maximum Temperature RTV Silicone Gasket Maker, 3 oz.…
  • Permatex 22071 Water Pump and Thermostat RTV Silicone Gasket, 0.5 oz., 0.5 Ounce.

Should I use RTV on a cork gasket?

Silicone (RTV) can be used on a gaket but only a very thin costing. It also can be used (just a dab) at the ends of the pan gasket where the gasket meets the end corks.

What is gasket sealer?


Gasket sealers are used to hold the gasket in place between the flanges, reinforcing both the joint's integrity and strength. A gasket alone is often enough to complete the join, but sealant is favoured by engineers to create a last line of defence.

Should I use gasket sealer water pump?

You don't need sealer on the pump gasket if you already put the sealer onto the pump. The gasket is good enough on the engine, you don't need to put sealer on that. If you need help replacing the water pump, a technician from YourMechanic can come to your location and perform this service for you.