Before the use of modern rubber gaskets, many automotive gaskets were made of cork. Most commonly, cork gaskets were used for valve covers, timing chain covers, oil pans and intake manifolds. Like rubber gaskets, cork gaskets conform to any irregularities in the gasket’s mating surfaces. However, their cork construction makes them prone to tearing if improperly installed. Fortunately, cork valve cover gaskets are generally easier to install than cork gaskets for other components.
Things You'll Need
- Socket wrench
- Rubber hammer
- Gasket scraper
- Gasket sealer
- Torque wrench
- Engine’s specifications manual
Remove the bolts holding the valve cover to the cylinder head with a socket wrench.
Tap on one side of the valve cover with a rubber hammer to break the seal between the valve cover and the cylinder head, then lift the cover off of the head.
Scrape the old gasket off of the inner lip of the valve cover and from the top of the cylinder head with a gasket scraper.
Apply a bead of gasket sealer to each side of the new gasket, then press the gasket into the groove on the valve cover. Note that some cork gaskets feature tabs that fit within slots on the valve cover to prevent the gasket from shifting. Make sure that the tabs and the slots align.
Place the valve cover onto the cylinder head, then tighten the cover’s securing bolt with a socket wrench only until the bolts are snug.
Tighten each valve cover bolt in small increments with a torque wrench until the proper torque setting is reached, as determined by the engine’s specifications manual. Tightening the bolts incrementally will ensure that the gasket seals evenly and does not tear.
- “Motor's Auto Repair Manual”; Ralph Ritchen; 1968
- “Haynes Repair Manuals: Ford Mustang V8, 1964-1973”; Chilton; 1999
How to Install P-Trap Gaskets
A P-trap is a P-shaped pipe attached to the drain of the sink. It consists of two pieces. The straight pipe that...
How to Install a Transmission Pan Gasket
Most transmission pan gaskets are made from cork. Cork gaskets will begin to leak over time because the material will actually wick...
How to Replace Harley Rocker Box Gaskets
Leaking rocker box gaskets were a particular problem with Harley Evolution engines. Harley went through four generations of lower rocker covers and...
How to Install Transmission Gasket
Tips for lining up gasket with transmission case. Remove as much of old gasket material as possible. Learn how to properly install...
How to Install a Toilet Tank Gasket
Learn how to install a toilet tank gasket from a professional plumber in this free home improvement and repair video tutorial.
How to Install a New Valve Cover Gasket
From the o-ring to silicon sealant, learn how to install a new valve cover gasket with tips from our expert mechanic in...
Replacing a Trumpet Water Key Cork
A trumpet water key cork, or spit valve, is very important for the sound of the instrument. Learn how to replace a...