S/B Chevy Oil Pan Gaskets, 1969-79 Blocks, One-Piece, 305 327 350 400 SBC

Description

S/B Chevy Oil Pan Gaskets, 1969-79 Blocks, One-Piece
Small Block Chevy Steel Core 1pc Oil Pan Gasket
Left Hand side (57-79) dipstick
For 2-piece rear main seal blocks
''69-''79 blocks
One-piece Pan Gasket'
Thick Font Pan Seal
Do I need a thin or thick oil pan gasket?
A "thin seal" is about 1/4 in. thick.
A "thick seal" is about 3/8 in. thick.
Which pans use which gaskets?
The OEM oil pans made between 1955 and 1974 used the "thin seal."
The OEM oil pans made in 1975 and later used the "thick seal."
Most aftermarket oil pans use the "thick seal."
Even though there is a clean break in the year ranges, it's best to double check by measuring. Measure the height and width of the area of the oil pan shown below.
Why does it matter?
Either way, if you use the wrong type of gasket, it will cause an oil leak.
If you use a thin seal when a thick seal is required, it will leave a gap around the timing cover.
If you use a thick seal when a thin seal is required, it will pull up on the corners of the front of the oil pan
Height
Width
Gasket Type Required
2 1/4 in.
5 1/2 in.
Thin Seal
2 3/8 in.
5 3/4 in.
Thick Seal