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jsteve
Samba Member
Joined: September 16, 2010
Posts: 6
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 Posted: Thu Sep 16, 2010 4:38 pm Post subject: Bent Push Rod |
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| I have a type 1 1965 motor. noticed oil under motor and saw bent push rod tube. pulled the head and changed bent push rod. put all back together ran great. next morning, went to start, sounded like it was missing and heard clicking again shortly there after. looked underneath and same pushrod bent, cylinder#1 intake. and suggestions? common? |
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teuton
Samba Member
Joined: April 02, 2003
Posts: 334
Location: Abilene Texas
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| Posted: Thu Sep 16, 2010 5:20 pm Post subject: |
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Stuck or bent valve?
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1965 VW Beetle |
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Cusser
Samba Member
Joined: October 02, 2006
Posts: 31373
Location: Hot Arizona
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61SNRF
Samba Member
Joined: March 29, 2009
Posts: 4657
Location: Whittier 90602
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| Posted: Thu Sep 16, 2010 5:36 pm Post subject: |
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I have seen this when an exhaust valve stuck closed because too tight a clearance in the guide on new exchange heads. That time I replaced the pushrod and just put it back together. Crossed my fingers and it never happened again.
Not sure if a sticking intake valve might cause this. If it's not because it's new, maybe lack of lubrication or lack of lead in our gasoline?
You didn't see any problems with the rocker arms, like loose or missing spring washers?
Something blocked or stopped the rocker or valve from moving. Not common as far as I know in an ACVW. |
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teuton
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Joined: April 02, 2003
Posts: 334
Location: Abilene Texas
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| Posted: Thu Sep 16, 2010 6:01 pm Post subject: |
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I said it first.
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1965 VW Beetle |
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Cusser
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Location: Hot Arizona
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61SNRF
Samba Member
Joined: March 29, 2009
Posts: 4657
Location: Whittier 90602
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| Posted: Thu Sep 16, 2010 8:55 pm Post subject: |
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I was too busy editing  |
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djkeev
Samba Moderator
Joined: September 30, 2007
Posts: 32625
Location: Reading Pennsylvania
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jsteve
Samba Member
Joined: September 16, 2010
Posts: 6
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| Posted: Fri Sep 17, 2010 9:04 am Post subject: |
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| djkeev wrote: |
I was going to say it but dinner was ready!! I knew someone else would.
Dave |
New to Samba. What a great resource. I pulled my head last night, and indeed, Stuck intake in #1. Removed valve, cleaned, scraped carbon off pistons and inside off head and put back together. When I fire it, all pistons firing except #1. Valve is moving freely. I adjusted valves to .006 1-2-3-4 starting from TDC #1 and 180 counterclock on crank. New plugs, difinatley getting spark. (found out the hard way). Just not getting fuel through intake I suppose. Any thoughts? |
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djkeev
Samba Moderator
Joined: September 30, 2007
Posts: 32625
Location: Reading Pennsylvania
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| Posted: Fri Sep 17, 2010 9:23 am Post subject: |
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| jsteve wrote: |
| djkeev wrote: |
I was going to say it but dinner was ready!! I knew someone else would.
Dave |
New to Samba. What a great resource. I pulled my head last night, and indeed, Stuck intake in #1. Removed valve, cleaned, scraped carbon off pistons and inside off head and put back together. When I fire it, all pistons firing except #1. Valve is moving freely. I adjusted valves to .006 1-2-3-4 starting from TDC #1 and 180 counterclock on crank. New plugs, difinatley getting spark. (found out the hard way). Just not getting fuel through intake I suppose. Any thoughts? |
That doesn't make sense that #1 isn't getting fuel, it is not fuel injected so any fuel headed to cyl #2 is also going to cyl #1 as well.
Have you done a compression test?
I'd also check out your plug and the wire that feeds it.
Firing order in the cap is correct? 1234 going counter clockwise? (rotor goes clockwise)
compression +
spark +
fuel
(all at the right time)
all 3 equal a running cylinder, you are missing one of these.
You say you have spark, at the distributor or at the #1 plug?
Dave
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Last edited by djkeev on Fri Sep 17, 2010 9:29 am; edited 1 time in total |
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jsteve
Samba Member
Joined: September 16, 2010
Posts: 6
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| Posted: Fri Sep 17, 2010 9:27 am Post subject: |
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| at the plug. removed plug, and tested. every once in a while it will pop from exhaust. Im thinking may be #2 not firing either. It has to be cause cylinder is warm. Im Stumped. |
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djkeev
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Joined: September 30, 2007
Posts: 32625
Location: Reading Pennsylvania
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jsteve
Samba Member
Joined: September 16, 2010
Posts: 6
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| Posted: Fri Sep 17, 2010 9:43 am Post subject: |
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| I am positive wires are in correct spot. i double checked timing. even tried a little advance in distributor then backed off to 7.5. at 4500 feet elevation. pulled out NGK plugs and replaced with Bosch Supers gapped .25. could be the plugs? Getting a spark though. Huh! |
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jsteve
Samba Member
Joined: September 16, 2010
Posts: 6
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| Posted: Fri Sep 17, 2010 9:43 am Post subject: |
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| Single Carb. |
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jsteve
Samba Member
Joined: September 16, 2010
Posts: 6
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| Posted: Fri Sep 17, 2010 10:59 am Post subject: |
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| Dave, thanks for our help. I went out fired it up and got on the throttle a bit. seemed to have woken it up. back fired a bit then started running like a champ. Must have had some debris in the valve seat? Thanks again to all. |
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Ajvdub
Samba Member
Joined: September 08, 2014
Posts: 69
Location: Los Angeles
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| Posted: Mon Sep 29, 2014 6:21 pm Post subject: Re: Bent Push Rod |
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| jsteve wrote: |
| I have a type 1 1965 motor. noticed oil under motor and saw bent push rod tube. pulled the head and changed bent push rod. put all back together ran great. next morning, went to start, sounded like it was missing and heard clicking again shortly there after. looked underneath and same pushrod bent, cylinder#1 intake. and suggestions? common? |
I'm having a similar issue. Valves were all tight, this one isnt moving. Mechanic said it may be stuck and could "wake up" now that they are adjusted, could be rusted. Rust blows out of the tail pipes when it revs. If you pull this spark plug wire, it idles and sounds the same, cylinder is definitely dead. Haven't done compression or leak down.
Sounds like there may be a quicker fix than removing the head, can the valve be worked on individually? Any lubricating additives like Marvel to try? Any help would be great. 1964 Beetle, all original.
This motor has sat for 20+ years, starts just fine, idles pretty smooth considering, has idled and been lightly revved only a few times since I bought it. Strong spark, ignition and timing set perfectly, new 30w oil, new Bosch plugs (confirmed spark), no clacking or abnormal noises, plug is dry and clean. Car is very low on power. Help! |
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HRVW
Samba Member
Joined: May 01, 2011
Posts: 2531
Location: Rosarito, Mexico
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| Posted: Tue Sep 30, 2014 10:09 pm Post subject: |
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 With the last situation posted since the engine sat for a LONG time you need to loosen the valves.
Remove the rocker arm and with the piston on the down stroke tap on the valve and spring with a rubber mallet while spraying a little Marvel Mystery Oil on the stem.
Do that on all of the springs and NOT just #1.
As the cam turns it pushes on the push rod that also is trying to open the valve and if the valve is TIGHT...Guess what...push rod will bend and probably drop out of the rocker as it is the weakest point there..
Pull the coil wire and have someone crank over the engine while you are watching from underneath to see if the valve is hanging UP.
Some engines can be fixed this way and I have NO guarantee it will work for you.
VW mechanic (retired) |
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Ajvdub
Samba Member
Joined: September 08, 2014
Posts: 69
Location: Los Angeles
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| Posted: Wed Oct 01, 2014 8:31 am Post subject: |
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| Thank you so much, I will try that. |
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HRVW
Samba Member
Joined: May 01, 2011
Posts: 2531
Location: Rosarito, Mexico
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| Posted: Wed Oct 01, 2014 8:58 am Post subject: |
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 As a side note buy a remote starter switch if you are by yourself.
Makes working a lot easier and the switch will come in handy for the VW or just about any car where it can be connected properly. |
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shortride
Samba Member
Joined: October 10, 2010
Posts: 1323
Location: Oklahoma
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