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> First time Valve Adjustment Issues
stugray
post May 8 2014, 12:21 PM
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I have two complete sets of used pushrods if you need some.
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Dave_Darling
post May 8 2014, 02:45 PM
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QUOTE(revhi109 @ May 8 2014, 10:33 AM) *

I will have to measure the valve height.


You don't have to measure--1/4" should be very obvious just to the eye!! Just take a look at it.

--DD
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revhi109
post May 8 2014, 02:55 PM
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I think the valves are fine. I just cleaned, lapped, and installed them recently. I just found this on the samba.
"Hydraulic lifters need 261mm long pushrods.
Solid lifters need 271mm long ones."

My thoughts are that I have all 261mm rods and they previous guy threw in 2 solid lifters on cylinder number 2. I will need to verify
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revhi109
post May 21 2014, 08:31 AM
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Finally Put in solid lifters and pushrods. Started adjusting valves the traditional way. Everything looking good. the adjuster screws are halfway in their adjustment range. I get to the last cylinder (#2) and I got the intake valve in spec, although the adjuster was almost maxed out. The exhaust still has too much play!! I have eliminated the pushrods and lifters from the equation. The valves look normal. I dont think its the cam since the opposite valve is in spec. Im about to pour gas all over this thing and end it now.
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Cap'n Krusty
post May 21 2014, 10:33 AM
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If I'm reading the last post correctly, the gap exceeds the ability of the adjuster screw to compensate, right? In that case, either the valve is too short or it's being held open by something. Like a foreign object or a dropped valve seat. If some of the lifters were hydraulic and some solid, we have a basic problem. Solid lifters don't work right with an hydraulic cam profile, and the other way around. THAT needs to be addressed before you go any farther. Brushing your teeth doesn't correct foul language, nor does a Band Aid fix the broken femur sticking out of your leg. Address the underlying problem before you attend to the details.

The Cap'n
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bdstone914
post May 21 2014, 10:57 AM
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Does not make sense that the valves and seats are good and you can't adjust #2. Remove the rocker arms from that side and put a Straight edge across the valves. Are they all the same height? Adjusting screws the same length?

Regarding what the Cap'n said do you know if it is a hydraulic or solid cam?
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revhi109
post May 21 2014, 10:57 AM
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Correct. The engine came with hydraulic lifters and rods. I can only assume the cam was meant for those. Didnt realize the cam was specific. I took a picture on my phone. let me figure out how to get in on here.
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revhi109
post May 21 2014, 11:05 AM
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http://imgur.com/HgsBTHX
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SLITS
post May 21 2014, 11:15 AM
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Solid Cam Specs

Hydraulic Cam Specs

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bdstone914
post May 21 2014, 11:41 AM
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QUOTE(revhi109 @ May 21 2014, 10:05 AM) *

http://imgur.com/HgsBTHX


Hard to tell but looks like the exhaust valve is not as tall as the intake. Remove the rockers and compare the height of all the valves on the side. If they are not the same the head needs to come off to find out why.
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revhi109
post May 21 2014, 02:43 PM
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would anything bad happen if I used solid lifters with a hydro cam?
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revhi109
post May 22 2014, 05:28 PM
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http://imgur.com/uYvw66s

Stumped. Valves appear to be seated evenly. Pushrods and lifters were checked. I seriously believe I have a rocker problem. Can I try swapping cylinder 2 rockers with cylinder 3 rockers?
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Dave_Darling
post May 22 2014, 09:10 PM
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You can swap rockers around, but I don't remember which way you can go. At the absolute worst, you can swap them from the head on the opposite side.

Are you sure that the pushrods are seated in the lifters? Absolutely certain? On some cylinders on my motor, the rods love to hang up on the lip of the lifter cup. I push the short end of an L-shaped Allen wrench down the rod and use it as a lever to push the inner end of the rod up, and push it in so it seats in the cup. Then hold it in place while I get the rockers on enough to hold the rod in place.

Sometimes a dab of grease can hold the rod in the cup long enough to get the rockers on.

--DD
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revhi109
post May 23 2014, 08:46 AM
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I have had the pushrods in and out multiple times and I am pretty sure. Plus, if they were not seated correctly, they would be sitting on the ledge of the lifter and it would be too tight. I have the opposite effect. I will try swapping the rockers around and if that doesnt work, I think I will seek professional help. There is a local guy who does aircooled stuff. I didnt expect this many issues with this build.
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Dave_Darling
post May 23 2014, 08:54 AM
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Whoops! Sorry, I was remembering what a PITA it was on a couple of occasions to get the rods seated that I totally spaced on the symptoms being the opposite...

--DD
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bdstone914
post May 23 2014, 09:25 AM
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Not sure if this has anything to do with your problem.
Note that the rocker arms are two different widths where they slide onto the shaft. Not sure what happens if you get them swapped around. Look at the side that is adjusting ok and compare it to the ones that are the problem.
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stugray
post May 23 2014, 10:03 AM
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All intake rockers are the same and all exhaust rockers are the same.

Either that or I am extremely lucky because I have fit three completely different sets to my engine with no distinguishing marks to identify where they go and they worked fine each time.

If they go in a particular location, then I need to buy a lottery ticket.
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revhi109
post May 23 2014, 10:14 AM
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Here is a crazy thought: Is it possible that those 2 rockers got bend if the piston hit the valves? The guy I bought the engine from was selling rebuilt engines from his garage. He had mounds of engine parts. Maybe he used the rockers off a blown engine.
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bdstone914
post May 23 2014, 11:46 AM
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QUOTE(revhi109 @ May 23 2014, 09:14 AM) *

Here is a crazy thought: Is it possible that those 2 rockers got bend if the piston hit the valves? The guy I bought the engine from was selling rebuilt engines from his garage. He had mounds of engine parts. Maybe he used the rockers off a blown engine.


Pull off one side and check the problem ones to a non problem set. I would think a push rod would bend first.
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Kirmizi
post May 23 2014, 11:47 AM
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QUOTE(bdstone914 @ May 23 2014, 09:46 AM) *

QUOTE(revhi109 @ May 23 2014, 09:14 AM) *

Here is a crazy thought: Is it possible that those 2 rockers got bend if the piston hit the valves? The guy I bought the engine from was selling rebuilt engines from his garage. He had mounds of engine parts. Maybe he used the rockers off a blown engine.


Pull off one side and check the problem ones to a non problem set. I would think a push rod would bend first.

(IMG:style_emoticons/default/agree.gif)
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