1986 720 2.4 Head replacement

[Joecar]

My original head cracked and i need a new one. Where can i find a new head with everything on it? Or should i used the old components and install it on the new head?

[datzenmike]

I doubt you will find a bare head casting anywhere. Try to find a used Z24 head from a wrecking yard. A used replacement head should have the valves, rockers and cam in it. You don't want to put your valve train parts into a different head if you can avoid it.

[Joecar]

1 hour ago, datzenmike said:

I doubt you will find a bare head casting anywhere. Try to find a used Z24 head from a wrecking yard. A used replacement head should have the valves, rockers and cam in it. You don't want to put your valve train parts into a different head if you can avoid it.

Evergreen CH3001 Single Spark Plug Cylinder Head Compatible With 83-89 Nissan D21 720 Pathfinder 2.4 Z24 Z24i https://www.amazon.com/dp/B08K3TS4DT/ref=cm_sw_r_awdo_RWGNC6ZSQ3FYJB2ZM6E2?psc=1 would this be a good one?

[datzenmike]

Not in N America compatible. Look for one with dual spark plugs.

[Thomas Perkins]

Here's one...https://www.ebay.com/itm/284417721820

[datzenmike]

Really nice price!!!!................. (note the sarcasm font)

[Joecar]

That seems overpriced lol

[Joecar]

2 hours ago, datzenmike said:

Not in N America compatible. Look for one with dual spark plugs.

https://www.autozone.com/external-engine/engine-cylinder-head/p/nutech-engine-cylinder-head-2324/992201_0_0 how about this

[Thomas Perkins]

Stay away from Auto part engines,transmission's and heads...I know people that bought from them and transmission company's that says stay away from them.Jack,the guy that installed my Jasper engine also said he does not mess with Autozone.Cheaper is not better,I got 90,000 miles on my Jasper engine.You get what you pay for.Do it right the first time.Came with a nation wide 3 year or 100,000 mile warranty.

Edited April 9, 2022 by Thomas Perkins

[Joecar]

Where should i get my head from then

[Logical1]

I have a line on several Z heads and have more than a few myself. PM me and hopefully we can work something out! 

[Joecar]

[Joecar]

This is what it looks like

[datzenmike]

Where's the crack?

[Joecar]

20 minutes ago, datzenmike said:

Where's the crack?

I dont knowni was just told that it was cracked. Also 2 to last valve is very rusty. I dont know if it can be rebuilt or replaced. Im trying to send a picture of it but it says its oversized file

[Joecar]

[Joecar]

Just now, Joecar said:

This is what it looks like at the bottom

[Joecar]

Cause there was alot of water in the oil. When u went to drain it, it was just water then oil mixed with water 

[datzenmike]

Z24 are well known for blowing their head gaskets. If you keep driving the coolant steams and passes by the rings and get into and mixes with the oil. Probably nothing wrong with the head just a bad gasket. 

 

That said it should be checked for flatness. Wire wheel the combustion chamber clean. Easy enough to remove those two valves and brush them clean too.  $30 headgasket is way cheaper than $800 and a $30 headgasket. 

[Joecar]

2 hours ago, datzenmike said:

Z24 are well known for blowing their head gaskets. If you keep driving the coolant steams and passes by the rings and get into and mixes with the oil. Probably nothing wrong with the head just a bad gasket. 

 

That said it should be checked for flatness. Wire wheel the combustion chamber clean. Easy enough to remove those two valves and brush them clean too.  $30 headgasket is way cheaper than $800 and a $30 headgasket. 

I dont have a wire wheel. Could i possible take it to a machine shop to clean it for me? Also looking at the old gasket it looks fine too me still is held up but should probably get a new one

[Joecar]

13 hours ago, datzenmike said:

Z24 are well known for blowing their head gaskets. If you keep driving the coolant steams and passes by the rings and get into and mixes with the oil. Probably nothing wrong with the head just a bad gasket. 

 

That said it should be checked for flatness. Wire wheel the combustion chamber clean. Easy enough to remove those two valves and brush them clean too.  $30 headgasket is way cheaper than $800 and a $30 headgasket. 

I just took it to a machine shop and they said it is indeed cracked

[Joecar]

Anybody know where u can get one with the valves and camshaft included?

Edited April 10, 2022 by Joecar

[jagman]

I have two complete Z24 heads but I live in SW Virginia.  I have no idea what shipping would be from here.

[bottomwatcher]

I have taken several good complete longblocks to the scrapyard because no one wanted them. I would look for a complete long block rather than try to resurrect what you have. 

 

 

[Joecar]

1 hour ago, jagman said:

I have two complete Z24 heads but I live in SW Virginia.  I have no idea what shipping would be from here.

How much would you be asking for it? And are they still good?