left or right heads

gerlof_1 · 01-10-2007, 01:30 PM

hay
are the left and right heads of a 394 the same?

Oldsfan · 01-11-2007, 05:58 AM

Right and left heads on a 394 will interchange, but they won't be drilled properly to accept the power steering and alternator/ac brackets. The head with the engine number stamped on it belongs on the passenger side.

Paul

gerlof_1 · 01-11-2007, 08:31 AM

ok,thanks.
now i will look for the numbers on the heads.

is there also a difference in low and high compression heads on this 394ci
because i have a high compression engine(red)whith low compression heads(blue)

Oldsfan · 01-12-2007, 05:39 AM

I believe high and low are the same, without looking in my parts book. I think 61 and 62 are the same, except for '61 Starfire which apparently had larger valves. I need to look in the book for interchangability between '59 and '63. Compression difference was in the gaskets and pistons.

Paul

01-10-2007, 01:30 PM	#1 (permalink)
gerlof_1 Member Join Date: Sep 2006 Location: netherlands Posts: 48	left or right heads hay are the left and right heads of a 394 the same?

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01-11-2007, 05:58 AM	#2 (permalink)
Oldsfan Senior Member Join Date: Jul 2006 Posts: 482	Right and left heads on a 394 will interchange, but they won't be drilled properly to accept the power steering and alternator/ac brackets. The head with the engine number stamped on it belongs on the passenger side. Paul

01-11-2007, 08:31 AM	#3 (permalink)
gerlof_1 Member Join Date: Sep 2006 Location: netherlands Posts: 48	ok,thanks. now i will look for the numbers on the heads. is there also a difference in low and high compression heads on this 394ci because i have a high compression engine(red)whith low compression heads(blue)

01-12-2007, 05:39 AM	#4 (permalink)
Oldsfan Senior Member Join Date: Jul 2006 Posts: 482	I believe high and low are the same, without looking in my parts book. I think 61 and 62 are the same, except for '61 Starfire which apparently had larger valves. I need to look in the book for interchangability between '59 and '63. Compression difference was in the gaskets and pistons. Paul