There's Zero Valve Lash on my Holden 308 - Wrong Pushrods?
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- Опубликовано: 14 окт 2024
- Before I start assembling my Holden 308, another one of the tests I'm doing is checking the valve train and rocker geometry. Lucky I did, because I've found that there is variation in the free-play or lash, from barely enough to none at all, without any preload added via the adjusters. What's the solution? I'm not sure yet...
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Expert knife flick😂
🤣🤣🤣
Hi Stace - thanks for your video
I think pre-buying pushrods is a bit of a lesson that everyone has to learn
it is much better to wait until you can put everything together and then measure the length you need
Can I suggest that you set the adjusters on the rockers to the middle of their range and then use the mid-lift method to get the correct push rod length
Good luck - have fun
will look forward to your next video 👍👍
Thank you, and yes, what a lesson. The pushrods came as part of my cam kit, which was supposed to save a bit of money, but now costs more! 😂
Yep, I ended up setting the adjusters mid way to get a better pushrod length... then there's the trick of how to measure a pushrod's length...
Recall Holden head valve seat grinds sat valves at different heights. Very obvious when place straight edge over tips valve stems. Other influences push rod travel reground cam, shaved head and block mating surfaces.
Good info thanks. I had the intake seats cleaned up and the exhaust seats are new for unleaded. And did the straight edge trick. I reckon it's a combo of the rest you mentioned.
Great videos. Try putting the lifters in a container of oil and leave overnight and they will prime
Thank you! I had left them in oil for longer than that, but it seems maybe they'll only truly prime with oil pressure? Not to worry, I'll soak them all for a week, likely, before final assembly.
Thank you 👍
Stace Why Do I Get The Feeling You Have Inherited A Mix-Match Engine And That's Why Nothing Works ???
Very interesting idea... it was running before I started messing with it! Personally I feel like it's just small variabilities in each component, adding up rather than cancelling each other out.
Keep up the great work 👍 👏 💪 👌
Lots of chances to learn things I never expected, on account of the little problems along the way. Fun, though.
@@staceonwheels I'm going to put a 253 in my HG kingswood ute .
Noice. Are you rebuilding it yourself?
@staceonwheels I might just put the v8 in and hope it's OK. The ute is getting a complete makeover, which I'll be doing all the work myself.
Enjoy and good luck with your 253.
im a newbie but was wondering if the valve seat made the extra play "? say if there was a variation in depth taken during valve grind?
That's certainly a factor. The valve seats were professionally machined, with new valves, so the valve stems could be sitting higher and tipping the rocker arms more over the pushrods, giving less freeplay... 🤔
@@staceonwheels cheers im finding your vids helpful as i start my rebuild on an early 253