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Pushrod tubes... Spread them or not?
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Topic: Pushrod tubes... Spread them or not? (Read 13776 times)
quickkafer
Jr. Member
Posts: 77
German-Pride.com
Pushrod tubes... Spread them or not?
«
on:
March 15, 2007, 21:19:28 pm »
My present 1776 motor was built by someone else and it's leaking like a siv! I'm really NOT complaining as he used all nice parts, but didn't use much for sealant. It's got stock style stainless steel pushrod tubes on it. I've only used stock ones, and I've heard that you've got one good "crush" on them before they're out of shape. Some guys claim that there is enough resiliency in the metal to pull the accordian portion out and reuse them. What do you guys think? I'd like to use those ss tubes again if I can.
I've heard others say that they pull on them before installing them when they are brand new.
What works for you? Let's hear your secrets.
I've only put together 4 motors so far, but I've pulled heads on several more to replace damaged heads, etc. I've had success with new tubes, white seals, and a bit of gasgacinch between the tube and the seal, and again on the seal and the case. I also put the seam on the tube pointing up.
Scott Faivre
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Roman
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Posts: 656
Re: Pushrod tubes... Spread them or not?
«
Reply #1 on:
March 15, 2007, 22:46:02 pm »
I have re-used them several times and I have spread them slightly each time. It works for me! I have permatex on the white seals but I don't know if it's needed, I just do it just in case.
On the engines I have built or replaced the tubes with new it has never been a need for spreading them. Maybe it's needed if you have a really wide stroker?
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Fastbrit
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Re: Pushrod tubes... Spread them or not?
«
Reply #2 on:
March 15, 2007, 22:55:58 pm »
Seams upwards, spread them slightly, ultra clean surfaces on head and case, and no sealant. Works every time...
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Lids
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Re: Pushrod tubes... Spread them or not?
«
Reply #3 on:
March 15, 2007, 23:07:08 pm »
I reused my stock ones, pulled them, cleaned them, no sealant: no leaks...
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Re: Pushrod tubes... Spread them or not?
«
Reply #4 on:
March 15, 2007, 23:28:42 pm »
Hmmm,
I'm using VW "CT" Pusrod Tubes on my Motor and never had a Problem with Oil Leaks...
Frank
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Chuck Fryer
Full Member
Posts: 148
Re: Pushrod tubes... Spread them or not?
«
Reply #5 on:
March 16, 2007, 00:13:14 am »
I have had good luck cleaning them REAL good, stretching them a bit, install the white seal, then install them dry. (fingers crossed) I have hardly ever had a leak this way, but, everyone has his/her own system for a leak free engine.
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quickkafer
Jr. Member
Posts: 77
German-Pride.com
Re: Pushrod tubes... Spread them or not?
«
Reply #6 on:
March 16, 2007, 01:44:01 am »
Quote from: Frank LUX on March 15, 2007, 23:28:42 pm
Hmmm,
I'm using VW "CT" Pusrod Tubes on my Motor and never had a Problem with Oil Leaks...
Frank
Okay, I'll Bite... What's a "CT" Pushrod Tube.
I'm going to try installing them naked this time. (No not me! The pushrod tubes with no sealant!
)
Scott Faivre
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Re: Pushrod tubes... Spread them or not?
«
Reply #7 on:
March 16, 2007, 03:56:44 am »
CT engine was a type 4 bus engine, so i'm guessing he uses those type 4 pushrods...
perhaps i'm wrong...
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Diederick
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alex d
Hero Member
Posts: 1035
Re: Pushrod tubes... Spread them or not?
«
Reply #8 on:
March 16, 2007, 09:32:41 am »
in fact a CT engine is a type 1, used in 1600 vanagons, but with a specific cooling and case; what's the difference with the pushrod tubes Frank?
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Shubee2 (DSK)
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Re: Pushrod tubes... Spread them or not?
«
Reply #9 on:
March 16, 2007, 14:31:41 pm »
I Only Use German Push Rod Tubes I strech them a little Install the seals with a little gasgacinch and have never had a leak I Never Reuse Push rod tubes it cheap insurance against leaks Seams always Up!!
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Re: Pushrod tubes... Spread them or not?
«
Reply #10 on:
March 16, 2007, 16:01:16 pm »
Quote from: quickkafer on March 16, 2007, 01:44:01 am
I'm going to try installing them naked this time. (No not me! The pushrod tubes with no sealant!
)
I don't know Scott, it sounds worth a try. You might be onto something.
Make sure you leave the garage door open.
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Mike H.
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quickkafer
Jr. Member
Posts: 77
German-Pride.com
Re: Pushrod tubes... Spread them or not?
«
Reply #11 on:
March 16, 2007, 21:50:10 pm »
...and I thought I was opening myself up for some ribbing with
"spread them or not?"
Scott Faivre
«
Last Edit: March 16, 2007, 21:52:03 pm by quickkafer
»
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Cornpanzer
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Posts: 902
Re: Pushrod tubes... Spread them or not?
«
Reply #12 on:
March 17, 2007, 00:54:27 am »
I put a thin coat of silicone on the inside and outside of the white pushrod tube seals. Seam up, bellows slightly stretched. I have zero leaks.
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Cheesepanzer
Sr. Member
Posts: 431
Re: Pushrod tubes... Spread them or not?
«
Reply #13 on:
March 17, 2007, 03:35:27 am »
Quote from: Cornpanzer on March 17, 2007, 00:54:27 am
I have zero leaks.
Except when the car lunges forward immediately before a loud BOOM!
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Cheesepanzer
Sr. Member
Posts: 431
Re: Pushrod tubes... Spread them or not?
«
Reply #14 on:
March 17, 2007, 03:41:26 am »
I stretch mine slightly, apply a thin coat of permatex to the tube (under the seal) and as the seal is slid onto the tube it seals it off nicely against the ridge. Then I apply a thin coat to the white seal. Then when I put them in the case and head I turn them back and forth to seat them, then align the seams up. Then as I torque the head down I constantly check the alignment and use a 1/2" drive extension to position the end of the tube straight into the head so I don't have any issues with my ratio rockers and pushrods.
No leaks (at least from the pushrod tubes
). And I too have re-used tubes before, but not more than a second time.
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Rasser
Sr. Member
Posts: 488
Re: Pushrod tubes... Spread them or not?
«
Reply #15 on:
March 17, 2007, 11:09:54 am »
I have read all you guys good advices now, but I wonder why nobody mentioned that there are really crappy gasket kits out there on the market. With these crappy gaskets, not even the best tips and best sealants will keep your engine dry.
My advice - look around and buy the best gasketkits you can get hold of. (I have good experience wtih El-ring) - and i too use permatex in/out side off gaskets = NO leaks
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quickkafer
Jr. Member
Posts: 77
German-Pride.com
Re: Pushrod tubes... Spread them or not?
«
Reply #16 on:
March 18, 2007, 04:13:14 am »
Yes, El-ring are the best. They make the white seals. The red ones are crap.
Good Point! Thanks for mentioning that!
Scott Faivre
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