I want to know what are all the holes for on a engine block deck surface? I Know some are to help with putting the cylinder head on and others are to bolt the head down. But what are the rest?

  • 3
    A picture would work wonders here.
    – Zaid
    Commented Jul 13, 2016 at 1:12

1 Answer 1


The other holes are to allow coolant and/or oil to flow through the cylinder head and engine block.

The coolant is needed to help cool down the combustion chamber.

Here is an example of a Chrysler engine block with coolant holes.

Chrysler Block
(source: 440source.com)

On overhead cam engines the camshafts require oil for lubricating the journal bearings that they spin on.

  • That's what I thought. Have a head gaskets that's fits my block but covers those holes a bit. Someone told me it was okay but I knee better. Will any gasket made by Ford for L4 Engine work for every ford L4 Engine or do models have differences
    – LostPecti
    Commented Jul 13, 2016 at 1:25
  • 1
    @LostPecti that doesn't sound right. Your gasket should have provision for those holes.
    – Zaid
    Commented Jul 13, 2016 at 1:32
  • Maybe I put it on wrong. Its not coving up to much but still it should be exact.
    – LostPecti
    Commented Jul 13, 2016 at 1:33
  • 1
    @LostPecti post up some pictures in your gasket question. That will eliminate guesswork from other users who would like to help.
    – Zaid
    Commented Jul 13, 2016 at 1:34
  • @LostPecti If you place the gasket over the cover in the right position, and you are sure it is there, but still some holes are covering, check if you can open or expand the holes a bit with a piercing tool. Holes needs to be all open for gaskets and ideally perfect match. Commented Jul 14, 2016 at 16:28

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .