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4age oversized valves replacement
Posted: Sat Nov 07, 2015 2:12 am
by speedmaster
Is there any OEM oversized valves from other engines that fits 16v and 20v? I know some trucks can use 16v springs and valve seals.
Re: 4age oversized valves replacement
Posted: Sat Nov 07, 2015 10:58 am
by yoshimitsuspeed
speedmaster wrote:Is there any OEM oversized valves from other engines that fits 16v and 20v? I know some trucks can use 16v springs and valve seals.
Search the MR2OC for using 3SGTE valves. I don't know the details but I know it has been done.
Re: 4age oversized valves replacement
Posted: Sat Nov 07, 2015 12:50 pm
by sirdeuce
I've heard tell of using 7mgte valves, but some mods were necessary. Take all the info with a grain of salt though. People that tell of the journey to cross over parts are a bit shy when it comes to the results.
Re: 4age oversized valves replacement
Posted: Mon Nov 09, 2015 9:56 am
by oldeskewltoy
O/S valves are only half the story.... you'll need O/S seats installed into your head so you can accommodate O/S valves.
Ferrea, Supertech, and SI Valve (likely a few others) all carry an O/S 4AGE valve, a set is usually under $300
Re: 4age oversized valves replacement
Posted: Mon Nov 09, 2015 10:03 am
by yoshimitsuspeed
oldeskewltoy wrote:O/S valves are only half the story.... you'll need O/S seats installed into your head so you can accommodate O/S valves.
Ferrea, Supertech, and SI Valve (likely a few others) all carry an O/S 4AGE valve, a set is usually under $300
Supertech recommends running the stock seats.
Don't ask me how this works out to be better but it's what they told me.
I don't go to Supertech much anymore.
Re: 4age oversized valves replacement
Posted: Mon Nov 09, 2015 1:46 pm
by oldeskewltoy
yoshimitsuspeed wrote:oldeskewltoy wrote:O/S valves are only half the story.... you'll need O/S seats installed into your head so you can accommodate O/S valves.
Ferrea, Supertech, and SI Valve (likely a few others) all carry an O/S 4AGE valve, a set is usually under $300
Supertech recommends running the stock seats.
Don't ask me how this works out to be better but it's what they told me.
I don't go to Supertech much anymore.
20V? or 16V? or did they specify both.... just wondering because the O/S option on 20V is "only" 1mm(intake only maybe??), while the O/S option can, and typically is 2mm on 16V
16V with O/S seats....

Re: 4age oversized valves replacement
Posted: Mon Nov 09, 2015 6:32 pm
by yoshimitsuspeed
Pretty sure I was inquiring about the 16v but it was a long time ago so I won't make any promises.
Re: 4age oversized valves replacement
Posted: Thu Nov 12, 2015 1:18 pm
by NH-hillbilly
supertechs oversize valves are 2mm bigger ex. and 1.5mm bigger intake. Regardless of what they say, (been there done that) you most certainly need a larger seat installed to run these valves in a 16v head.