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Tech Area => General Buick Tech => Topic started by: ~JM~ on July 09 2021, 04:14:28 PM

Title: New Int/Exh Valves & Over-Sized Valves?
Post by: ~JM~ on July 09 2021, 04:14:28 PM

136K miles & the heads are off. Thinking about replacing the valves while I have it apart. Seeking advice on make, material & type of valves to use.

Is there much of an option for larger valves? Doesn't look like there is much room between them.

How often are valve stem seals installed on the exhaust valves?

Title: Re: New Int/Exh Valves & Over-Sized Valves?
Post by: Steve Wood on July 09 2021, 05:17:58 PM

here are a couple of threads from the past.  Not much benefit, if any, over stock valves...

https://www.turbobuick.com/threads/porting-heads-go-big-valves-or-stock-size.204690/

https://www.turbobuick.com/threads/porting-heads-go-big-valves-or-stock-size.204690/

Title: Re: New Int/Exh Valves & Over-Sized Valves?
Post by: ~JM~ on July 09 2021, 06:13:20 PM

Thanks. I'm not having much luck with my searches. The points brought up on the exhaust side interest me. I've been looking at the head casting & feel the exhaust side looks very restrictive.

Title: Re: New Int/Exh Valves & Over-Sized Valves?
Post by: ~JM~ on July 09 2021, 06:14:52 PM

Vertical pics are the ones that do not turn out well. Same pic as above but turned horizontal.

Title: Re: New Int/Exh Valves & Over-Sized Valves?
Post by: ~JM~ on July 09 2021, 07:06:35 PM

  :rock:

Title: Re: New Int/Exh Valves & Over-Sized Valves?
Post by: nocooler on July 09 2021, 10:33:32 PM

I forgot how shitty that exhaust port is

Title: Re: New Int/Exh Valves & Over-Sized Valves?
Post by: ~JM~ on July 10 2021, 05:19:12 PM

https://youtu.be/aMmgG0iaCI4?t=1415

Title: Re: New Int/Exh Valves & Over-Sized Valves?
Post by: ~JM~ on July 10 2021, 07:00:29 PM

https://youtu.be/As36dt7waBw