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11-07-2017, 07:19 PM | #1 |
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Knock Knock (again)
Sorry to say the earlier comments I made about solving my Knock Knock problem did not solve the problem. Within a short period of time running around, the old knock came back.
So I took things apart again-carb off, manifold off, valve plate cover off and checked things out again. Checked the valve clearance on the tappets and things seemed to be about the same as there were when I worked on them before. But when I was checking things, I was turning the engine back and forth with the timing wrench to get the valves right in the correct spot. When doing this I discovered old valve # 6 giving up a "click". It would happen when I would move the engine back and forth with the timing wrench when I had the tappet to the highest point (valve completely open). I would move the engine, the tappet would twist around and "click". I did this a number of times and the same thing happened. So----not knowing anything about what I was suppose to do in a situation like this, I figured I would adjust #6 tappet. So I set it a little tighter(closer together). Well, trying my procedure mentioned above (using the timing wrench) wow-- the "click" stopped! The tappet still turned around as I moved the engine but the click seems to be gone! So--- help again. Anyone have a similar experience with this type of situation? Am I dreaming that I have solved my "click" problem? Any other comments that may set me straight? Please help if all this rambling makes sense and what I did is a valid fix. Thanks again.
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Fred Kroon 1929 Std Coupe 1929 Huckster |
11-07-2017, 07:29 PM | #2 |
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Re: Knock Knock (again)
Marvel Mystery Oil in fuel.!!! Lubrication!!! Ethanol Gas is Dry as you may know! Sounds like you fixed it! Did you drive it yet? How tight is tight?
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11-07-2017, 08:27 PM | #3 |
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Re: Knock Knock (again)
Did not get it to tight. It was .016.
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Fred Kroon 1929 Std Coupe 1929 Huckster Last edited by Fred K-OR; 11-08-2017 at 11:23 AM. |
11-07-2017, 09:07 PM | #4 |
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Re: Knock Knock (again)
It was .”16” , or you set it at .016”?
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11-07-2017, 09:20 PM | #5 |
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Re: Knock Knock (again)
Guess I had better go check my record in the shop. The
old brain can't remember the details!!
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Fred Kroon 1929 Std Coupe 1929 Huckster |
11-08-2017, 11:22 AM | #6 |
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Re: Knock Knock (again)
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Now I am waiting to get another manifold before putting it back together to see how it works.
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Fred Kroon 1929 Std Coupe 1929 Huckster |
11-08-2017, 12:27 PM | #7 |
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Re: Knock Knock (again)
Have you done a compression test?
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11-08-2017, 12:42 PM | #8 |
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Re: Knock Knock (again)
is the oil dip tray loose in the oil pan, sometimes they pop out a bit and the lower end of the connecting rod may be hitting it.
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11-08-2017, 12:55 PM | #9 |
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Re: Knock Knock (again)
Seems like it still has too much clearance. Check a good source for the correct clearance. Mine are set quite a bit closer and I have had no problems.
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11-08-2017, 01:06 PM | #10 |
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Re: Knock Knock (again)
Yes, and they are all about in the 70' s
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Fred Kroon 1929 Std Coupe 1929 Huckster |
11-08-2017, 01:08 PM | #11 |
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Re: Knock Knock (again)
Interesting thought. May end up having to check this.
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Fred Kroon 1929 Std Coupe 1929 Huckster |
11-08-2017, 01:12 PM | #12 |
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Re: Knock Knock (again)
When it warms up a little in the shop, I will have to check the rest of them.
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Fred Kroon 1929 Std Coupe 1929 Huckster |
11-08-2017, 01:13 PM | #13 |
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Re: Knock Knock (again)
so the tappet is rotating in its hole? Doesn't seem right - only way that would happen is if the cam lobe or tappet is worn uneven / not parallel to each other.
Intake valves ideally would be .013" and exhaust .015" http://www.fordgarage.com/pages/ruleofnine.htm I set mine at those specs and runs great. I have heard a dip tray get loose - made an intermittent metallic sheetmetal clicking noise as it got loose near the front of the engine. Coulda sworn it was plunger noise or gear slop. Would only make noise upon hard deceleration or fast idle haha
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11-08-2017, 01:20 PM | #14 |
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Re: Knock Knock (again)
"so the tappet is rotating in its hole? Doesn't seem right - only way that would happen is if the cam lobe or tappet is worn uneven / not parallel to each other."
I was wondering about something like this sort of thing happening. Does it cause major problems as times go on?
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Fred Kroon 1929 Std Coupe 1929 Huckster |
11-08-2017, 01:48 PM | #15 |
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Re: Knock Knock (again)
Tappets need to rotate as the cam turns or they will wear a concave line across where the lobe strike the face of the tappet.
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11-08-2017, 03:25 PM | #16 |
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Re: Knock Knock (again)
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11-08-2017, 04:51 PM | #17 | |
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Re: Knock Knock (again)
Quote:
But the thing that seemed strange is that the #6 did rotate but as it rotated around it "clicked". And I would rotate the engine back and forth with the timing wrench, and it would "click" each time I went back and forth. Is there something that would cause this or am I "hearing things"? I am far from an expert on these things and hope I am saying something that makes sense to someone.
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11-08-2017, 06:20 PM | #18 |
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Re: Knock Knock (again)
If adj the clearance to .016 got rid of the click why would you even entertain the thought of ck'ng the dipper tray??
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11-09-2017, 06:42 AM | #19 | |
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Re: Knock Knock (again)
Quote:
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11-09-2017, 12:26 PM | #20 |
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Re: Knock Knock (again)
The click might be caused by a valve hanging up slightly, then letting go. I'd run some MMO in your gas and a can of Sea Foam in the oil, or a can of Sea Foam in both gas and oil to see if that helps. It sure fixed an Olds I once bought cheap due to clicking tappets.
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11-09-2017, 01:11 PM | #21 |
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Re: Knock Knock (again)
I think you will find the cam is a little off the center line of the lifters that is what makes them rotate. They did that by design.
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11-10-2017, 07:06 PM | #22 |
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Re: Knock Knock (again)
Thanks guys for the additional ideas. I am waiting to get another manifold so I can get the thing back together again. So will have to try some of your added ideas a little later.
In the mean time I think I will check the clearances on the other values and see how they are. May also set number 6 back to where it should be and see what that does for me.
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11-10-2017, 08:20 PM | #23 |
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Re: Knock Knock (again)
I've set mine at .012 I & .014 EX and never had a burnt valve. Where are you going to set # 6?
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11-10-2017, 11:28 PM | #24 | |
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Re: Knock Knock (again)
Quote:
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11-10-2017, 11:30 PM | #25 |
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Re: Knock Knock (again)
Think I will just go with what Andrews recommends, the .013 and .015.
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Fred Kroon 1929 Std Coupe 1929 Huckster |
12-09-2017, 07:29 PM | #26 |
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Re: Knock Knock (again)
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Sorry about additional info on this subject again but I think I now have found the problem and fixed it. So thought I had better post what I did to solve problem. I took things apart again so that I could re-check the settings of the adjustable valves. Well I found that valve #6 was set at about .020. Wow way out! So I adjusted it again to where it should be and also re-checked some of the other valves. Found a couple of them out and adjusted them. Put everything back together again and started the rig up. Wow, no more knock! So I think, I have it fixed! But I have not had time to take it out on a road test so not to sure but it seems like it is fixed!!!! Anyway thought I would update you all with the latest messing around I have been doing with this problem and hope I have fixed this problem..
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Fred Kroon 1929 Std Coupe 1929 Huckster |
12-09-2017, 09:00 PM | #27 |
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Re: Knock Knock (again)
Did you settle on .013 and .015?
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12-09-2017, 09:14 PM | #28 |
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Re: Knock Knock (again)
Yes, maybe + or. - a bit. But close. As good as an old farmer can do!
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