valves and valve guide question

[Biggyclops]

Hi guys! Well I got the valve springs off and now on my 70 super beetle with a 34pict 3 DP looking at the valves and such.. my question is:

1) the valves look pretty good! Should I take some sort of measurements to ensure it?

2) The valve guides feel pretty good with the original valves (tiny bit of movement on all) when do you replace them?

3) If I do anything at all for replacement do you think replacing the valve springs is of the utmost?

I will be posting pictures of heads later on today.

[jlex]

Have the valves ever been replaced? I remember reading that the exhaust valves crystallize with the heat/cool cycles and become brittle so if you have access to them (heads are off) guys like to replace them as a preventative measure.
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jlex.
'70 std. "Elsie"
'88 Carrera

[Multi69s]

I can't remember, but is the 70 a non doghouse engine? If it is, replacing the exhaust valves are mandatory, especially #3. Regardless, for myself, anytime I tear down an engine that has a few miles on it, I ALWAYS replace the exhaust valves.
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69 road Bug 2110
73 Squareback - 2L, T4, Automatic W/ AC
Gone, but many fond memories 69 Baja Bug 2010 - 5 Rib Bus Transaxle
Gone but not forgotten 72 Baja Bug 2010
My builds
T4 into Squareback http://www.thesamba.com/vw/forum/viewtopic.php?t=458944&highlight=
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[Juanito84]

Yep. 1970 was the last year for the non-doghouse shroud. It was also the last year for the single port manifold. In the USA it got a 30 PICT-3 carburetor. It did have the dual relief case though.

But he has a 34 PICT-3. So it may have been converted not only to a dual port but also a doghouse.
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If a water cooled engine cools its water with air, isn't it just an overcomplicated air cooled engine?

[mark tucker]

tiny bit of movement....tiny is a very relative term. have them checked out by someone that knows what there doing or just get a new set.

[Biggyclops]

[Biggyclops]

I finally took some pictures of it!

Thinking they look pretty good from what i can see so far! What do you think?

[mark tucker]

replace at the least the ex valves with stainless.CB perf has then about $7. ea. then a good valve job, gap the keepers, so they grab the valves, reserface the heads and clean up the boogers where something went through there and check the pistons and rings too, replace if needed.

[Volks Wagen]

[Biggyclops]

No smoke but figured I wanted to rebuild them since I have the motor off

[Multi69s]

It almost looks like someone replaced the ex seats at some point. The intake seats are getting really low in comparison, and don't have much meat left. Make sure that you take them to someone who knows ACVWs, or they may cause more harm then good. Good luck
_________________
69 road Bug 2110
73 Squareback - 2L, T4, Automatic W/ AC
Gone, but many fond memories 69 Baja Bug 2010 - 5 Rib Bus Transaxle
Gone but not forgotten 72 Baja Bug 2010
My builds
T4 into Squareback http://www.thesamba.com/vw/forum/viewtopic.php?t=458944&highlight=
Auto Trans Rebuild http://www.thesamba.com/vw/forum/viewtopic.php?t=516066&highlight=
AC in Squareback https://www.thesamba.com/vw/forum/viewtopic.php?t=...highlight=

[Biggyclops]

[Multi69s]

It is one of those cases where cost could be a big factor, but ideally yes. Especially if you have the guides changed. Granted, I am just looking at a picture, but you probably have one seat cut left, after that, they will need to be changed. I have edited your picture so you can see what I see. If you notice the distance between the arrows, the ex seat has a far greater distance then the in. This area becomes smaller with each valve job. So looking at the in seat, there is not much room left. Also, when you replace the guides, they do not end up exactly centered in relation to the old guides. This means that when they cut the seats, material is removed from the seat in a different pattern. Since you don't have much room for fudging, you can run out of seat material. Now good head guys can get creative with different cutters, but then cost goes up, and it is just a band aid. So if you want to keep this engine for a long time, I would replace the seats.

_________________
69 road Bug 2110
73 Squareback - 2L, T4, Automatic W/ AC
Gone, but many fond memories 69 Baja Bug 2010 - 5 Rib Bus Transaxle
Gone but not forgotten 72 Baja Bug 2010
My builds
T4 into Squareback http://www.thesamba.com/vw/forum/viewtopic.php?t=458944&highlight=
Auto Trans Rebuild http://www.thesamba.com/vw/forum/viewtopic.php?t=516066&highlight=
AC in Squareback https://www.thesamba.com/vw/forum/viewtopic.php?t=...highlight=

[volksworld]

the original exhaust valves were a 2 piece design which came apart when overheated,so the solution was always one piece stainless valves...of course the odds that 40 year old valves are original arent very good...you really have to know what you're doing to replace seats properly and not have them come loose later...so much so that new heads are usually cheaper than having a seat replacement done correctly...so i wouldnt recomend touching the seats

[Juanito84]

The Bentley manual recommends just getting new heads rather than reseating them. Not that a good seating job wouldn't work. But you have to weigh the pros and cons.
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If a water cooled engine cools its water with air, isn't it just an overcomplicated air cooled engine?

[Biggyclops]

Looks like I will be ordering new heads!

[Multi69s]

The bottom line is cost. Both replacing the guides and seats is not a DIY project. It takes special knowledge and tools, and should be done by someone who regularly does ACVW heads. So compare the cost between having yours rebuilt, and going new. If you go rebuild, don't just trade in the heads, have yours rebuilt. Luckily the Type one engine is not prone to dropping seta like the Type 4, even when rebuilt.

I have found out that one the hard way
_________________
69 road Bug 2110
73 Squareback - 2L, T4, Automatic W/ AC
Gone, but many fond memories 69 Baja Bug 2010 - 5 Rib Bus Transaxle
Gone but not forgotten 72 Baja Bug 2010
My builds
T4 into Squareback http://www.thesamba.com/vw/forum/viewtopic.php?t=458944&highlight=
Auto Trans Rebuild http://www.thesamba.com/vw/forum/viewtopic.php?t=516066&highlight=
AC in Squareback https://www.thesamba.com/vw/forum/viewtopic.php?t=...highlight=

[Juanito84]

[Multi69s]