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leaking push rod tubes (seals)

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oval TOFU Bitte, ein Bit!

2,946 posts · joined Jul 2003 ·

#448565
yup, they are leaking all over my heater boxes. Should I replace just the seals, or the whole tube and the seals? On one side, the tubes look 'new' (they still have the stickers on them) but the other side look a bit old...

what to do.. what to do...
...and Robert's ya father's brother...

DIY-DUB Custom Title Time!

1,591 posts · joined Apr 2004 ·

#448567
whole lot at once if the $$ is available, easier in long term in my op👍

blutopless2 DAMSLO

2,457 posts · joined Jan 2004 ·

#448584
replace the lot.... at least then you KNOW that they are all new tubes and seals.
see.... air and water do mix 😉

1974 1300
1997 MK3 Golf GL
2003 NB Cabrio
2012 Golf VI GTI
2014 Audi A4 Quattro

oval TOFU Bitte, ein Bit!

2,946 posts · joined Jul 2003 ·

#449545
cool, I've ordered new stainless push rod tubes 🙂

I read in the manual that I should replace the gasket of the head-to-cylinder join. I suppose this is a good idea?
...and Robert's ya father's brother...

oval TOFU Bitte, ein Bit!

2,946 posts · joined Jul 2003 ·

#449559
The compression seems to be good (drives very well), so I'll probably just leave it. What's the deck height?
...and Robert's ya father's brother...

HGFS Wolfsburg Wizard

531 posts · joined Feb 2005 ·

#449763
oval TOFU wrote:The compression seems to be good (drives very well), so I'll probably just leave it. What's the deck height?
The amount of space between the piston at TDC and the top of the cylinder. One way to measure it is torque down a cylinder with a piece of flat bar going diagonally across the cylinder. Rotate the motor until that piston is at the top of the stroke and measure the gap between the piston & the bar with feeler gauges. The measurement, the cc's in the head & the stroke is used to calculate compression ratio.
1954 Oval long term project going nowhere
1958 Beetle drag car project
1959 Beetle project I need to sell one day
1969 Squareback

oval TOFU Bitte, ein Bit!

2,946 posts · joined Jul 2003 ·

#449796
SVW-054 wrote:The amount of space between the piston at TDC and the top of the cylinder. One way to measure it is torque down a cylinder with a piece of flat bar going diagonally across the cylinder. Rotate the motor until that piston is at the top of the stroke and measure the gap between the piston & the bar with feeler gauges. The measurement, the cc's in the head & the stroke is used to calculate compression ratio.
That sounds way above my head! If I do a compression test with the heads on and everything is ok (120psi give or take 10psi per cylinder?) I should be able to leave it all alone yeh?
...and Robert's ya father's brother...

oval TOFU Bitte, ein Bit!

2,946 posts · joined Jul 2003 ·

#449926
oval TOFU wrote:That sounds way above my head!
oh dear... I just realised the pun.. hahaha
...and Robert's ya father's brother...

*did*

0 posts · joined Sep 2003 ·

#449999
maybe go some adjustable push rod tubes, then you dont need to pull your heads.
just unbolt the rockers, pull out the push rods, bend and remove the old tubes, put in the new ones (with new seals), push rods back in, rockers back on and away you go!

oval TOFU Bitte, ein Bit!

2,946 posts · joined Jul 2003 ·

#450011
I've bought the 'normal' push rod tubes already... it's off with 'es head now! Besides, I haven't heard good things about the adjustable ones..
...and Robert's ya father's brother...

vw54 Administrator Always Waiting 4 Friday

16,723 posts · joined Aug 2002 ·

#450141
what size engine are we talking about 36 40 1500 ???

The compression test sounds good however i would re lap the barrels to each head to be sure it seals properly, which also means removing each barrel and cleaning the heads n tops of pistons of carbon build up.
I read it on FACEBOOK so it must be true


http://forums.aussieveedubbers.com/viewtopic.php?tid=91278&page=1#pid848630


http://forums.aussieveedubbers.com/viewtopic.php?tid=63561&page=1#pid624099


http://forums.aussieveedubbers.com/viewtopic.php?tid=4832&page=1#pid452603


http://forums.aussieveedubbers.com/viewtopic.php?tid=60650&page=1#pid574409

oval TOFU Bitte, ein Bit!

2,946 posts · joined Jul 2003 ·

#450191
40...

re lap???
...and Robert's ya father's brother...

vw54 Administrator Always Waiting 4 Friday

16,723 posts · joined Aug 2002 ·

#450215
OK theres no head gaskets on any of the air cooled VW engines so you have to lap each barrell to each head position, just like lapping valves to the head
I read it on FACEBOOK so it must be true


http://forums.aussieveedubbers.com/viewtopic.php?tid=91278&page=1#pid848630


http://forums.aussieveedubbers.com/viewtopic.php?tid=63561&page=1#pid624099


http://forums.aussieveedubbers.com/viewtopic.php?tid=4832&page=1#pid452603


http://forums.aussieveedubbers.com/viewtopic.php?tid=60650&page=1#pid574409

oval TOFU Bitte, ein Bit!

2,946 posts · joined Jul 2003 ·

#450444
vw54 wrote:OK theres no head gaskets on any of the air cooled VW engines so you have to lap each barrell to each head position, just like lapping valves to the head
Sorry, I still don't know what 'lapping' is.. :cry
...and Robert's ya father's brother...

vw54 Administrator Always Waiting 4 Friday

16,723 posts · joined Aug 2002 ·

#450495
You get Valve lapping paste which is an abrasive paste and apply it to the top of the barrell and insert it into the head then rotate back n forth to lap the faces together.

Its basic engineering as theres no gasket it makes the 2 surfaces flat so they seal when tighten up
I read it on FACEBOOK so it must be true


http://forums.aussieveedubbers.com/viewtopic.php?tid=91278&page=1#pid848630


http://forums.aussieveedubbers.com/viewtopic.php?tid=63561&page=1#pid624099


http://forums.aussieveedubbers.com/viewtopic.php?tid=4832&page=1#pid452603


http://forums.aussieveedubbers.com/viewtopic.php?tid=60650&page=1#pid574409

oval TOFU Bitte, ein Bit!

2,946 posts · joined Jul 2003 ·

#450565
do you get rid of th paste once you they're lapped together? or leave it in like a liquid gasket kinda thing?
...and Robert's ya father's brother...

koolkarmakombi enkarmarising

2,078 posts · joined Jun 2003 ·

#450584
http://www.valv-trol.com/lap.htm

google is your friend
This disclaimer does not reflect the thoughts or opinions of either myself, my company, my friends, or my dog: don't quote me on that; don't quote me on anything; this disclaimer is subject to change without notice; text is slightly enlarged to show detail; resemblance to actual persons, living or dead, is unintentional and coincidental; dry clean only; do not bend, fold, or mutilate; anchovies or jalapenos added to this disclaimer upon request; your mileage may vary; no substitutions are allowed; for a limited time only while supplies last; offer void where prohibited; this disclaimer is provided "as is" without any warranties expressed or implied

oval TOFU Bitte, ein Bit!

2,946 posts · joined Jul 2003 ·

#450588
this is scaring me..
...and Robert's ya father's brother...

vw54 Administrator Always Waiting 4 Friday

16,723 posts · joined Aug 2002 ·

#450625
Wash the paste out throughly from all surfaces other wise it will bed the rings in and cause blow by
I read it on FACEBOOK so it must be true


http://forums.aussieveedubbers.com/viewtopic.php?tid=91278&page=1#pid848630


http://forums.aussieveedubbers.com/viewtopic.php?tid=63561&page=1#pid624099


http://forums.aussieveedubbers.com/viewtopic.php?tid=4832&page=1#pid452603


http://forums.aussieveedubbers.com/viewtopic.php?tid=60650&page=1#pid574409