Intake Valve not seating
 

I am getting good compression on all cylinders but #8(30lbs). I pulled the head and intake and can see that the intake valve is not seating. I put a light in the intake hole and can see light around the edges of the valve in the closed position. Can anyone tell me how I should proceed with fixing this issue?

Re: Intake Valve not seating
 

You will have to pull the retainer and remove the valve it may be bent, if not clean and lube the guide/ valve.

Re: Intake Valve not seating
 

Do you have any clearance between the valve stem and lifter??

Re: Intake Valve not seating
 

I have removed the valve and cleaned it. I haven't put a feeler on it yet. I'll try to do that this afternoon.

Re: Intake Valve not seating
 

I think maybe the valve is bent.

https://uploads.tapatalk-cdn.com/202...1f64ecd5a9.jpg
https://uploads.tapatalk-cdn.com/202...5ce4297d8e.jpg


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Re: Intake Valve not seating
 

Looks to me like possibly lifter broke, crank it around so it moves up and look closer

Re: Intake Valve not seating
 

I second that. If you zoom in, looks like a crack on the lifter.

Re: Intake Valve not seating
 

It also looks like the valve guide halves are not even. Should be able to find a used valve,guide and lifter to replace what's there. Lap the valve and grind the stem to set clearance. If clearance is too much get a longer valve. Keep it simple. Mark

Re: Intake Valve not seating
 

The valve halves are ok. They are uneven in the picture because the clip isn't in holding them together. Just using the guide here to line up the valve stem.

I'll take another look at the lifter, but I have turned the engine over a few times and didn't notice any problems with it all together other than the valve not seating. Would a broke lifter keep the valve from seating properly?

Should the valve head be angled slightly? This one is, which is why I thought it may be bent.

Thanks!

Re: Intake Valve not seating
 

If it is sitting at a angle, its bent.

Re: Intake Valve not seating
 

The lifter is ok. The line you see is from the casting I assume.

I'm going to pull a different valve and check it in the same hole and see if it fits any better.

Re: Intake Valve not seating
 

Swapped the valve, and it seated right up.

Where should I order a new valve from? Mac Vanpelt?

Re: Intake Valve not seating
 

I would go with him or 3rd generation whoever maybe closest to you.
Reason valve bent?
Good that you found the problem.
Phil NZ

Re: Intake Valve not seating
 

An excellent selection.

'Barn'ers decided to create a couple of threads on the topic. See below.

https://www.fordbarn.com/forum/showthread.php?t=269580

https://www.fordbarn.com/forum/showt...1339&showall=1

Re: Intake Valve not seating
 

You may think of replacing the guide also. remove the lifter and look closely for a crack in the top angled side.

Re: Intake Valve not seating
 

valves dont just bend find the cause or you will go through all this drama again Next time it could be catastrophic

Re: Intake Valve not seating
 

I don’t know the history of this engine. I believe it was a rebuild but I’m not sure who did it or the level of quality of their work.

What should I look for? What would cause a bent valve?


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Re: Intake Valve not seating
 

i'ld re check that lifter it shore looks to be split to me also check the head above the valve for any signs of impact

Re: Intake Valve not seating
 

I don't believe the Ford style lifters are cast. Judging from the pictures, that lifter certainly looks cracked to me.

Re: Intake Valve not seating
 

While it open I would replace the complete lifter, valve, guide, clip, etc.. Lap it in, set it to specs and reassemble. You have apparently identified the issue and a little overkill on the fix may save you time and money down the road.
All you who have done a repair "half way" and had to go in and do it again raise your hand... If the second repair was three times as expensive and more time consuming than the first raise your hand.
Just saying, "enjoy the adventure"... Chap