Intake/exhaust valves(Vid+Pics)

[jhunfiyell]

okay, i redid my valves, and let me know if i did this right. Thank you


click on the pic below. i tried to get the video to be able to play here

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here's the pic for better details of the valves to see if its in the right position.

exhaust small? and intake large right?

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[ulitka]

What do you mean by "redid my valvels"?
They appear to be installed properly (small=exhaust, large=intake).

If you removed valves to be cleaned, then they have to go back in the same valve guides they came out from. If valves were mixed during reassembly, then there is a good chance valve seat and the valve may not not seal properly which will result in poor engine performance. Bring the head to a machine shop and have them perform a vacuum test on each port.

If you installed new valves, then valve seats must have been cut by a machine shop to match the new valves.

 

[jhunfiyell]

okay, i just needed to know if i had them on right, wasnt sure if it was backwards. but thank you!

 

[miloolim]

You really need to re seat and clean the valve seats. Ensures a good seat and seal. I have done this multiple times. As long as the valve is not bent and even the slightest bit bent you will be fine. Its easy and works fine.

How to Reseat / Lap Valves (Basic Valve Job) - YouTube

 

[jhunfiyell]

okay i redid my large valves, let me know if this looked seated right, i kept lapping for nearly 3hours, just to make sure its lapped to perfection. let me know please

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[BogusSVO]

Looks ok to me

http://www.dsmtuners.com/forums/articles-engine-fuel/341636-how-lap-valve.html

http://www.dsmtuners.com/forums/newbie-forum/420313-how-fluid-test-4g63-cylinder-head.html

 

[larvaman]

Sorry for thread jack, but I am also rebuilding my head and received new std. Stainless Valves. Can I just lap them into my existing seats or do they require machine work to the valves and valve seats before I install them?? The head had 140k miles and the factory valves were fine when removed and seats appear good.

 

[jeremy1375]

Sorry for thread jack, but I am also rebuilding my head and received new std. Stainless Valves. Can I just lap them into my existing seats or do they require machine work to the valves and valve seats before I install them?? The head had 140k miles and the factory valves were fine when removed and seats appear good.

I have had good luck getting new valves to seal without a seat grind. However, you should check your valve guides to see if they are within specs.

http://www.dsmtuners.com/forums/cyl...-do-you-check-valve-guides.html#post152308305