Re: Valve train question
[Re: bigcountry]
#1385401
02/11/13 12:50 PM
02/11/13 12:50 PM
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Joined: Nov 2003
Posts: 36,040 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
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Hyd lifter I'm assuming. Piston to valve collision? How much preload do you have? More details on what was punched thru on the lifter.
live every 24 hour block of time like it's your last day on earth
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Re: Valve train question
[Re: Yellow Fever]
#1385403
02/11/13 01:22 PM
02/11/13 01:22 PM
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Joined: Jan 2003
Posts: 74,977 U.S.S.A.
JohnRR
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I Win
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Posts: 74,977
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Quote:
You took used lifters from another motor and put them in? I doubt it will last very long, should have just put one new lifter in or all new lifters.
I was thinking the same thing , good luck ...
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Re: Valve train question
[Re: bigcountry]
#1385405
02/12/13 12:54 AM
02/12/13 12:54 AM
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Joined: Nov 2003
Posts: 36,040 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
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I'd pull the valve springs off of the offending cyl with an on eng valve spring compressor & check piston to valve clearance with a pair of light checking springs. The rocker arm could have failed from high spring pressure but you said the lifter was punched thru also. I would suggest some more checking unless you're sure V/P clearance is adequate
live every 24 hour block of time like it's your last day on earth
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Re: Valve train question
[Re: bigcountry]
#1385410
02/13/13 10:25 AM
02/13/13 10:25 AM
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Joined: Mar 2007
Posts: 3,277 West Coast, USA
jbc426
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master
Joined: Mar 2007
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West Coast, USA
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When you're saying the pushrod punched a hole through the lifter, can you describe what that looks like or post a picture?
Did the lifter have a hole through the bottom of it and look a bit concave where it meets the cam?
1970 Plymouth 'Cuda #'s 440-6(block in storage)currently 493" 6 pack, Shaker, 5 speed Passon, 4.10's 1968 Plymouth Barracuda Convertible 408 Magnum EFI with 4 speed automatic overdrive, 3800 stall lock-up converter and 4.30's (closest thing to an automatic 5 speed going)
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Re: Valve train question
[Re: bigcountry]
#1385411
02/13/13 11:40 AM
02/13/13 11:40 AM
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Joined: Jan 2003
Posts: 74,977 U.S.S.A.
JohnRR
I Win
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I Win
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Quote:
Yes both lifter and rocker were punched thru. Can't figure out why piston to valve clearance or spring tension would become an issue at this point?? Motor probably had 3000 miles on it with this setup. Any ideas? By the way thanks for all the input and help.
Was the block decked and the heads surfaced also ? Adding shims under the rocker shafts is the WRONG way to fix what is one of your real issues ... pushrods that are TOO LONG.
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Re: Valve train question
[Re: bobs66440]
#1385413
02/13/13 11:05 PM
02/13/13 11:05 PM
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Joined: Feb 2003
Posts: 12,675 Columbia, CT
moper
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I Live Here
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Posts: 12,675
Columbia, CT
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If the lifter face had a hole in it (worn) you can stop doing anything and closely inspect the camshaft without the intake in place. You have engine damage and the more you swap in used parts and run it the more damage is done. If the cam lobe that killed that lifter is also damaged (and no, it running with another used lifter for ANY time is not helping) then you have serious repairs. Inspect it. Closely. Immediately.
Well, art is art, isn't it? Still, on the other hand, water is water! And east is east and west is west and if you take cranberries and stew them like applesauce they taste much more like prunes than rhubarb does. Now, uh... Now you tell me what you know.
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Re: Valve train question
[Re: bigcountry]
#1385415
02/14/13 07:45 AM
02/14/13 07:45 AM
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Joined: Mar 2010
Posts: 1,880 Out in Left Field, NY
bobs66440
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Joined: Mar 2010
Posts: 1,880
Out in Left Field, NY
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Yes, the shims are used to adjust lifter preload. Some say they really aren't a good idea because they effectively increase the diameter of the rocker shaft, which makes them too snug for the pedestals in the head and causes them to crack. I've never actually seen one crack, so I'm not sure if it's true, but it sounds logical. Adjustable rockers are better, but expensive. If you want to use the stock rockers, the correct way to adjust preload is to get a custom set of pushrods made. That's what I did with mine.
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Re: Valve train question
[Re: bobs66440]
#1385416
02/14/13 02:07 PM
02/14/13 02:07 PM
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Joined: Feb 2003
Posts: 12,675 Columbia, CT
moper
I Live Here
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I Live Here
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Columbia, CT
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Shims are "bad" because they move the centerline of the rocker shaft. That in turn can negatively affects the path the rocker follows - they affect the geometry of the rocker. So you add shim to adjust for the wrong pushrod, and the rocker tip ends up riding slightly off in terms of it's path accross the top of the valve. So for the cost of pushrods you run the risk of wearing the guides faster, valvetrain instability, wearing the rockers faster, and wearing the valve stem tips faster.
Well, art is art, isn't it? Still, on the other hand, water is water! And east is east and west is west and if you take cranberries and stew them like applesauce they taste much more like prunes than rhubarb does. Now, uh... Now you tell me what you know.
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Re: Valve train question
[Re: bigcountry]
#1385417
02/14/13 02:23 PM
02/14/13 02:23 PM
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Joined: Jan 2003
Posts: 25,200 Upper Midwest
MoparforLife
Too Many Posts
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Too Many Posts
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Posts: 25,200
Upper Midwest
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Quote:
Well the pushrods from both 440's are the same length. Have the heads been surfaced/block decked...will have to check, I dont know. The lifter face is not where the hole was punched, it is on other end where pushrod meets. The lifters I pulled from Superbee are a little longer than the ones that I pulled from, another 440. Put the two different lifters side by side WITH the shim on top of shorter lifter and they are the exact same length. I figured the shims, which are NOT homemade, were added under the rockerarm shafts for clearance??I was told shims were used before ajustable rocker arms were around?
Case height of the lifters don't mean didily. The preload is determined by the depth of the plunger after the rocker shaft is tightened down with the lifter on the base circle of the cam with the lifter, push rod, and rocker all in place.
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Re: Valve train question
[Re: MoparforLife]
#1385419
02/14/13 02:38 PM
02/14/13 02:38 PM
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Joined: Mar 2010
Posts: 1,880 Out in Left Field, NY
bobs66440
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Quote:
Quote:
Well the pushrods from both 440's are the same length. Have the heads been surfaced/block decked...will have to check, I dont know. The lifter face is not where the hole was punched, it is on other end where pushrod meets. The lifters I pulled from Superbee are a little longer than the ones that I pulled from, another 440. Put the two different lifters side by side WITH the shim on top of shorter lifter and they are the exact same length. I figured the shims, which are NOT homemade, were added under the rockerarm shafts for clearance??I was told shims were used before ajustable rocker arms were around?
Case height of the lifters don't mean didily. The preload is determined by the depth of the plunger after the rocker shaft is tightened down with the lifter on the base circle of the cam with the lifter, push rod, and rocker all in place.
Exactly right. When I was building mine, I had two different brand lifters side by side. They had different overall heights but the distance from the plunger and the face where the lifter meets the cam was the same. That's the dimension that matters.
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Re: Valve train question
[Re: jbc426]
#1385424
02/15/13 01:34 PM
02/15/13 01:34 PM
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Joined: Jan 2003
Posts: 25,200 Upper Midwest
MoparforLife
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Upper Midwest
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Quote:
Quote:
Thanks for all the reply's. Plan on putting a new set of lifters in it and give it a go. Might buy a new set of heads for it this summer and if I do I will go with an adjustable roller rocker setup.
How many miles do you have on this motor since this all happened?
It's kind of surprising you don't have a flat/ damaged cam lobe already from running those used lifters, and you'll be taking another chance when installing that new set.
A lot of people on this board aren't so lucky even with all new parts.
I hope this all works out for you and you've Dodged a bullet.
Over ther years Ihave seen people that put the lifters in a box and reused them when reassembling. Making sure that the lifters and cam are clean and well lubricated and they end result was no problem. Granted it isn't a good idea but if you have run it for even a relatively short time with no problem I would not worry about it and run it. Save your money for later up grades. The damage would have been virtually immediate.
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Re: Valve train question
[Re: Dodgeguy101]
#1385425
02/16/13 12:53 AM
02/16/13 12:53 AM
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Joined: Jan 2011
Posts: 35 Dallas, Texas
bigcountry
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Dallas, Texas
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Quote:
I would be asking why did it only happen on one? If all these assumptions were correct, you would have 16 pushrod problems, not one. IMO.
That is why I asked this question. Most people say it just happens sometimes BUT I want to know the cause. These lifters have less than 15 miles on them plus 10-15 min idle time after installing them.
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Re: Valve train question
[Re: Dodgeguy101]
#1385428
02/17/13 12:36 AM
02/17/13 12:36 AM
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Joined: Jun 2012
Posts: 1,899 MYRTLE BEACH SOUTH CAROLINA
ek3
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MYRTLE BEACH SOUTH CAROLINA
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Quote:
I would be asking why did it only happen on one? If all these assumptions were correct, you would have 16 pushrod problems, not one. IMO.
it can not be put more simply than that. lifters dont just get holes sometimes. post a photo of dammaged parts.......
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Re: Valve train question
[Re: bigcountry]
#1385430
02/17/13 08:13 PM
02/17/13 08:13 PM
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Joined: Mar 2008
Posts: 5,746 Ontario, Canada
Dodgem
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one way is to leave I want to preview my post and/or attach a file checked then it will have a place to choose file to attach file must be resized small enough to be allowed. Other is to go to Photobucket.com join upload your photo there click the photo and there will be a links box to the right click the IMG line (second from bottom) the come hear and paste in your post Ctrl V or use paste in browser and line shows up and will show as a picture after you post
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