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Sidevalve heads

 
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JIMBOB
500RPM



Joined: 11 May 2021
Posts: 518
Location: Canberra

Posted: Fri Jul 23, 2020 12:31 pm    Post subject: Sidevalve heads

Here's another question for the sidey techo's.

I have two sets of heads, the finned alloy set and a standard cast set. They are both 24 stud. The cast set has the coolant inlets at the front, the alloys in the middle top.

Are the heads interchangeable on the block or are there more differences? I haven't removed the cast heads from the block yet.

Cheers and beers
Jimbob
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devilrod
Cruisin



Joined: 11 Jun 2021
Posts: 350
Location: Cranbourne North

Posted: Fri Jul 23, 2020 12:59 pm    Post subject:

My understanding is (I could be wrong) that if they are both 24 studders they should bolt straight on. Quick way to check is pull one and compare head gasket with alloy head, should also have copper head gaskets if you are really lucky, bit of copper spray and you can reuse them. As for the coolant outlets they vary depending on model and make and what they were in.
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32V8
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Joined: 15 Jul 2020
Posts: 15
Location: Perth. W.A.

Posted: Fri Jul 23, 2020 7:33 pm    Post subject:

They are inter changable on either the early 59A series engine(up to 1948) or on the later 8BA series Customline engines. However depending on which combo you choose, ie late heads/early block or early heads/late blocks there is a modification that you must do. Let me know what combo you have in mind and I will try to help you out.
Just love those flatheads!!
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JIMBOB
500RPM



Joined: 11 May 2021
Posts: 518
Location: Canberra

Posted: Wed Jul 28, 2020 2:55 pm    Post subject:

32V8, I will be running early heads on a late block. What does this require?

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Jimbob
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Flatoz
1000RPM



Joined: 02 Apr 2021
Posts: 1212
Location: Melbourne

Posted: Wed Jul 28, 2020 10:13 pm    Post subject:

need to plug the front water hole on the aussie drivers side where the dizzy is, if you look at a pair of 8BA heads they have a little area for the dizzy clamp plate to bolt too, this covers a water hole.

just need to drill and tap it to 3/8 from memory (being that it isnt too corroded) then put a plug in it, too simlpe
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32V8
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Joined: 15 Jul 2020
Posts: 15
Location: Perth. W.A.

Posted: Thu Jul 29, 2020 10:11 pm    Post subject:

Ok,early heads with the centre water outlet, fitted to an 8BA block.
You need to use a die grinder and enlarge the rear water passages in the head, to match the shape in the block. Use an 8BA head gasket to mark the water passages on the head.
You also must block up the front water passage in the head. Do this with a stainless steel plug after tapping the correct thread in the head. Be aware though that these engines have been around for a while so every man and their dog has had a go at them. There are no hard and fast rules here, just check out each section of the head/block and make sure that the holes are matched or blocked off, whichever the case may be.
32V8
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JIMBOB
500RPM



Joined: 11 May 2021
Posts: 518
Location: Canberra

Posted: Fri Jul 30, 2020 9:07 am    Post subject:

Cheers blokes, many thanks. I'll post some picks as I go through the build, so all can see where I screw this up

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Jimbob
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32V8
Rookie


Joined: 15 Jul 2020
Posts: 15
Location: Perth. W.A.

Posted: Fri Jul 30, 2020 10:42 am    Post subject:

Im building a hot flathead for a 32 coupe I am building, so stay in touch. Maybe we can help each other. I am using a 46 block, merc crank, flatattack heads etc. Will be 275 cubes. Also using a 4 speed auto and 9 inch diff.
32V8
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Flatoz
1000RPM



Joined: 02 Apr 2021
Posts: 1212
Location: Melbourne

Posted: Sat Jul 31, 2020 9:15 pm    Post subject:

32V8 JIMBOB,

might want to check the head gasket first, as with most modern gaskets the larger water holes that are at the corner of the head are only a small button hole in the gasket, which doesnt make sense I know, but might not be worth opening it up? save some time for no return in the end.
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