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| exhaust valves https://www.slantsix.org/forum/viewtopic.php?t=44376 |
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| Author: | Pallazzo [ Wed Apr 06, 2011 3:32 pm ] |
| Post subject: | exhaust valves |
Hi, i need to buy 6 exhaust valves for my slant six 225, in the motor manual says that the valves are diameter 9,423 to 9,448 mm, but the valve that i have in my hands is a little bit more than the standard, 9,82mm, i don´t know is deformed by use or is this measure correct, need help to know what measures of valves exist? then buy the correct valve, thanks |
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| Author: | terrylittlejohn [ Thu Apr 07, 2011 1:45 am ] |
| Post subject: | |
you sure of those measurements? a 1.78in =45.21mm, stock vavles were 1.62in and 1.36in. |
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| Author: | GTS225 [ Thu Apr 07, 2011 3:50 am ] |
| Post subject: | |
Looks like he's referring to stem diameter. Roger |
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| Author: | Pallazzo [ Thu Apr 07, 2011 4:54 am ] |
| Post subject: | |
yes, i´m sure of the measurement, because i use a micrometer to measure the rod, in order ascendent, the head diameter is 34,417mm, rod have 9,82mm, and at the end of the rod where touch the valve regulator have 9,448mm, then i need to know wich measures of bigger valves do exist? |
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| Author: | 4speed [ Thu Apr 07, 2011 7:44 am ] |
| Post subject: | |
I am guess ing that you are asking about the valve stem? Some times machine shops will drill out valve guides to clean them up and use over size valve stems to bring them back to spec. Measure your valve guides for size and if they are to big have NEW guides pressed in. Or bronze inserts. Never have them "knurled" as they will wear out very fast. |
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| Author: | 4speed [ Thu Apr 07, 2011 7:45 am ] |
| Post subject: | |
People-please remember that a lot of people in the world will write out 12.456 as 12,456-its a Euro thing. |
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| Author: | Joshie225 [ Thu Apr 07, 2011 8:12 am ] |
| Post subject: | |
It appears you have replacement valves with oversize stems. This was common years ago in areas or shops which don't have the equipment to replace valve guides. They can ream the guides oversize and then fit valves with larger stems. In this day and age the guides are typically relined with bronze. K-Line is a popular choice. http://www.sbintl.com/KLine.html One the guides are properly reconditioned the valve seats are refinished and new valves with standard size stems are installed. |
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| Author: | Pallazzo [ Mon Apr 11, 2011 11:04 am ] |
| Post subject: | |
thanks for the support: i find a .030" over size valve, this have a little more than 10mm, is the third size of the over sized valves (.005", .015", .030") the head cilinder´s had a ,015" and i find the next over size, .030" i will modify the guide to put it on. thanks so much and the slanty says thanks too. |
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