'38 V12 head removal.

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Bluedevil
Posts: 120
Joined: Fri Oct 05, 2018 7:07 am

'38 V12 head removal.

Post by Bluedevil » Fri Nov 09, 2018 6:24 am

Can you remove the heads from a V12 without taking the engine out. It looks tight and I have cast iron heads.

Thanks.

Bill

Dave Czirr
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Joined: Tue Jun 16, 2009 5:30 am
Location: New Jersey

Re: '38 V12 head removal.

Post by Dave Czirr » Fri Nov 09, 2018 6:30 am

Yes.

Good luck freeing up the stuck valves. I've seen several Twelve engines rebuilt but no personal experience, all I can say is to use EXTREME patience; a thorough professional valve job on a Twelve can be very expensive, $20K in one case I know of.

Bluedevil
Posts: 120
Joined: Fri Oct 05, 2018 7:07 am

Re: '38 V12 head removal.

Post by Bluedevil » Wed Mar 27, 2019 9:58 am

Success,

After a few months of Kroil soaking and gently tapered wedges, I was able to get the left head off.

Pretty good news, no ridge and only one cylinder that appeared to have a head gasket leak. Does not appear to be much if any pitting.

Was able to free up the stuck Packard script valves as a bonus.

Cast iron head looks good, now off to the other side.

Can't wait to put the new aluminum HC heads on and start it up.

Bluedevil
Posts: 120
Joined: Fri Oct 05, 2018 7:07 am

Re: '38 V12 head removal.

Post by Bluedevil » Wed Apr 17, 2019 5:39 am

Right side off. I took off the water jacket covers and it had about 3" of dirt/rust. It wasn't caked, just loose.

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