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Author Topic: spring loaded pushrod tubes  (Read 2936 times)
pupjoint
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« on: October 24, 2016, 14:01:27 pm »

who makes decent ones nowadays, stock 1600 daily runner has leaky rod tubes, so need to use these spring loaded ones as temporary fix till i have the time to drop the motor and do it properly.
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Fiatdude
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« Reply #1 on: October 24, 2016, 14:12:43 pm »

the more O-rings and the heavier the spring the better -- I don't run anything but these -- for years now!!!
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nicolas
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« Reply #2 on: October 24, 2016, 17:06:00 pm »

i have been using CSP ones for a few years and i can say they are top notch quality. JPM should be the same quality. and fast fab seems to be very decent, but i have no experience, it's what i would buy if i needed some.

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Martin S.
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« Reply #3 on: October 24, 2016, 17:29:23 pm »

I have CSP ones that leaked because the cylinders are a few mm's longer and the spring wasn't strong enough.
The last thing done to help the leaks was to add a machined aluminum spacer to give the spring more strength.
One is still leaking tho, even after the spacers were added. Cry
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Cal Look white 68 Bug with AJ Sims EFI Turbo 2332. 194hp 240tq @ 5500 rpm 3psi boost.
Fiatdude
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« Reply #4 on: October 24, 2016, 21:14:52 pm »

The trick to keep them from leaking is to put a spare donut from the ends on the slider section so that it fits between the spring and the bigger section,,,,, That usually clears up that problem and it adds tension to the spring
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Fiat -- GONE
Ovalholio -- GONE
Ghia -- -- It's going

Get lost for an evening or two -- http://selvedgeyard.com/

Remember, as you travel the highway of life,
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DaveN
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« Reply #5 on: October 24, 2016, 21:18:51 pm »

I use the Fast Fab pushrod tubes on both my engines, very good quality.
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Martin S.
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« Reply #6 on: October 25, 2016, 16:43:04 pm »

The trick to keep them from leaking is to put a spare donut from the ends on the slider section so that it fits between the spring and the bigger section,,,,, That usually clears up that problem and it adds tension to the spring

Do you think that would work in my case with these CSP pushrod tubes? Here is a pic after the al spacers were installed. Would an extra donut seal fit in there ok?
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Cal Look white 68 Bug with AJ Sims EFI Turbo 2332. 194hp 240tq @ 5500 rpm 3psi boost.
andy198712
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« Reply #7 on: October 25, 2016, 16:58:15 pm »

i have Jaycee ones and wouldn't recommend them.

had to remove a nasty machining bur from inside each one that would have killed the O rings, and the seals are perishing after less then a year on the car and the springs aren't stainless so rusting
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Martin S.
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« Reply #8 on: October 25, 2016, 17:25:28 pm »

Ugh, whatever happened to buying parts that work. Here is a link to the Fast Fab ones http://www.fastfabonline.com/Push-Rod-Tube-Set_p_64.html
Interesting that none of the sellers mention anything about how they fit using longer cylinders. Are long cylinders that unusual?
« Last Edit: October 25, 2016, 18:09:02 pm by Martin S. » Logged

Cal Look white 68 Bug with AJ Sims EFI Turbo 2332. 194hp 240tq @ 5500 rpm 3psi boost.
Fiatdude
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« Reply #9 on: October 25, 2016, 19:58:41 pm »

The trick to keep them from leaking is to put a spare donut from the ends on the slider section so that it fits between the spring and the bigger section,,,,, That usually clears up that problem and it adds tension to the spring

Do you think that would work in my case with these CSP pushrod tubes? Here is a pic after the al spacers were installed. Would an extra donut seal fit in there ok?


I'd try pulling the spacer out and putting the donut up against the black tube --


The only ones for long cylinders were the ones Roger Crawford made at Head's up (now closed, I got the last set) and I believe Pauter is making some now....
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Fiat -- GONE
Ovalholio -- GONE
Ghia -- -- It's going

Get lost for an evening or two -- http://selvedgeyard.com/

Remember, as you travel the highway of life,
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Dougy Dee
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« Reply #10 on: October 25, 2016, 23:55:49 pm »

Scat has some longer ones too. 3 o-rings.
The springs seem weaker than the ones used on the shorter tubes.

Martin: Shouldn't the smaller diameter tube's end fit against the head?
This would allow oil unhindered flow to the sump rather than pooling at the step where the two tubes join.
« Last Edit: October 26, 2016, 00:02:08 am by Dougy Dee » Logged
pupjoint
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« Reply #11 on: October 26, 2016, 00:51:02 am »

found this http://www.syngear.co.uk/shop.php

but website doesnt seem to work that well from my place. they have some videos on youtube
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neil68
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« Reply #12 on: October 26, 2016, 02:44:41 am »

Logmech also lists some large ID spring-loaded pushrod tubes:  http://logmech.se/eng/products/engine/pushrod-tubes/
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Neil
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'68 Beetle, 2332 cc, 204 WHP
12.5 seconds @ 172 KM/H (107.5 MPH)
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Martin S.
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« Reply #13 on: October 26, 2016, 15:33:38 pm »

Scat has some longer ones too. 3 o-rings.
The springs seem weaker than the ones used on the shorter tubes.

Martin: Shouldn't the smaller diameter tube's end fit against the head?
This would allow oil unhindered flow to the sump rather than pooling at the step where the two tubes join.


Yes you're right Dougy! Thanks for pointing that out. One end is larger inside than the other. According to the installation instructions:

Please note that the mounting direction
of the pushrod tube is essential!
The black end of the pushrod tube
has a larger inner diameter with is required
on high performance engines.
When you use large ratio rockers the
pushrods move up and down inside
the tube to a much larger extent than
normal. The larger inner diameter of
the CSP pushrod tubes will give extra
clearance in this area.
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Cal Look white 68 Bug with AJ Sims EFI Turbo 2332. 194hp 240tq @ 5500 rpm 3psi boost.
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