Valve/head specs

Neo1874 · 01-26-2005, 11:56 AM

Operation restore Cutlass is in full swing now (well the engine portion anyway). I was hoping someone could clairfy the valve specs for my heads. The casting number is 403859/ID code 6. From the specs I've found on this website and a few others the IN/EX valve's should measure 1.995/1.624 respectively, however the valves I have measure 1.88/1.56 which are the measurements for the #5 Olds ID code. No biggie I guess but I'm going to replace all the valves and lo and behold no one (summit, milodon etc...)offers valves with these specs. All that I have found are 2.07/1.71 which I figure are for BB heads. I guess my question is 2 fold. What size valves "should" I have and can my heads be machined (has anyone attempted) to accept the larger 2.07/1.71 valves?

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
79 W-30 Hurst/Olds value?	Sharkbite	Cutlass	3	02-05-2007 05:55 AM
1987 Cutlass 3.8l Carb	87CUTTY	Parts Wanted	0	11-15-2006 01:15 PM
Chevy 350 SB boltin up to tranny	t_visker	Cutlass	4	09-12-2006 07:47 AM
74 Hurst Olds numbers match, cheap	Deepsouthauto	Cars For Sale	2	03-20-2006 04:14 AM

01-26-2005, 11:56 AM	#1 (permalink)
Neo1874 Junior Member Join Date: Jan 2005 Location: WF, TX Posts: 6	Operation restore Cutlass is in full swing now (well the engine portion anyway). I was hoping someone could clairfy the valve specs for my heads. The casting number is 403859/ID code 6. From the specs I've found on this website and a few others the IN/EX valve's should measure 1.995/1.624 respectively, however the valves I have measure 1.88/1.56 which are the measurements for the #5 Olds ID code. No biggie I guess but I'm going to replace all the valves and lo and behold no one (summit, milodon etc...)offers valves with these specs. All that I have found are 2.07/1.71 which I figure are for BB heads. I guess my question is 2 fold. What size valves "should" I have and can my heads be machined (has anyone attempted) to accept the larger 2.07/1.71 valves?