Head gasket

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Datsun AshLee
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Head gasket

Post by Datsun AshLee » Fri May 11, 2018 8:58 pm

Hi everyone, I know this is a dumb question but I'm trying to replace my head gasket to prove to my dad that I can do it without his help!! Anyway, what side of the gasket goes against the block? The gasket I have has an orange bead of (I'm guessing) a sealant on one side and not on the other side, so does this side go against the block or the head

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Nissanman
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Re: Head gasket

Post by Nissanman » Fri May 11, 2018 10:26 pm

The gasket won't be reversible. Once you line up all the holes in the engine block with the gasket then that is the way it goes.
Nissanman, just trying to help.
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mraitch
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Re: Head gasket

Post by mraitch » Fri May 11, 2018 10:59 pm

So

Make sure thar BOTH surfaces are clean AND match.

Why are you replacing the head gaskety??

Often, head gasket 'blowing' has an impact on the water pump - depending upon wha happened.
remember, you are dealing with a cast iron block and an aluminum head.

So, perhaps,, it is just not showing your dad, but perhaps you might want to look firtrher into why this heppened in the first place.

and then there iz the intake manifold gasket????
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Datsun AshLee
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Re: Head gasket

Post by Datsun AshLee » Sat May 12, 2018 11:20 am

I found water in my oil, it was very milky. The motor still ran but leaked a little water down the exhaust side of the motor, when the head was pulled there was water on the top of the pistons.

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Nissanman
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Re: Head gasket

Post by Nissanman » Sat May 12, 2018 8:02 pm

You should inspect the water passages in the head very carefully for erosion that is evident allowing the coolant to enter the cylinders.
A new head gasket will not solve that.
Lay the gasket onto the head surface and see how much larger the head passages are compared to the gasket cutouts.
The head, if corroded, will require welding repairs.
Datsun/Nissan engines typically rot out at cylinder #4 since that is the lowest part of the engine head and any sediment will collect there. :(
Nissanman, just trying to help.
1965 SP310 Engine No. G-93326 Car No. SP310-10817
http://nissanman.shutterfly.com/117
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Datsun AshLee
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Re: Head gasket

Post by Datsun AshLee » Sun May 13, 2018 10:33 am

I am switching the heads because I have a good head from a different motor however I noticed that there was some rust down in the block where the push rods go down into and there is a little rust around the top edge of the pistons. Is this going to be a problem?

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Nissanman
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Re: Head gasket

Post by Nissanman » Sun May 13, 2018 8:37 pm

Errrk! The danger I see with rust on the pistons is that the rings may have corroded to the bores, thus causing further problems.
How long ago was this engine running do you know?
Nissanman, just trying to help.
1965 SP310 Engine No. G-93326 Car No. SP310-10817
http://nissanman.shutterfly.com/117
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Datsun AshLee
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Re: Head gasket

Post by Datsun AshLee » Sun May 13, 2018 9:12 pm

Last year

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Nissanman
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Re: Head gasket

Post by Nissanman » Sun May 13, 2018 9:23 pm

It may be OK but it has been through a winter like this hasn't it?
Mop up the water and dose up all the rusty bits with a de-watering fluid like WD-40 or CRC 556.
Have you turned the engine over at all or is it how you found it?
Nissanman, just trying to help.
1965 SP310 Engine No. G-93326 Car No. SP310-10817
http://nissanman.shutterfly.com/117
McQueen!
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Datsun AshLee
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Re: Head gasket

Post by Datsun AshLee » Wed May 16, 2018 11:27 pm

Haven't tried turning it over yet

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Nissanman
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Re: Head gasket

Post by Nissanman » Wed May 16, 2018 11:40 pm

That could be a problem if the bores have been wet and the rings have corroded.
Make sure you use heaps of WD 40 inside the bores and let soak.
Nissanman, just trying to help.
1965 SP310 Engine No. G-93326 Car No. SP310-10817
http://nissanman.shutterfly.com/117
McQueen!
He's on the road again!