What is the 1700cc tapet clearance ??

[1970bay]

Once again the garage knows best

The mechanic set my tappets to .4 or .5 mm im nor sure which

A sticker on the engine says intake .15 mm or .006 inches
For the exhaust it says .2 mm or 008 inches

In the book which includes the 1700cc motor it says the tappet clearance is .15mm for each in & out BUT for SOME 1700cc engines WHY not all?? .2 mm extra for the out valve,WHY is it sooo complicated

What is the clearance for the exhaust out valve?? .15mm .17mm or .2mm??
_________________
Travels with my camper:
http://flickr.com/photos/30879804@N08/

Built in 1971 The engine was changed from 1600cc to a 1972 flat 1700cc engine in 1974 otherwise nothings been changed std twin vw carbs

[Wildthings]

For the exhaust valves on some engines VW originally specced 0.008" or 0.2mm. However they later revised the spec to 0.006" or 0.15mm because of complaints about noisy lifters.

Since the original sodium filled exhaust valves that caused VW to have the wider spec have long since been replaced with standard valves on almost all engines, only the 0.006" or 0.15mm spec would apply today anyway, so that is what you want to use for multiple reasons.

[1970bay]

OH but i could still have sodium valves??Or why would mine get a sticker??
_________________
Travels with my camper:
http://flickr.com/photos/30879804@N08/

Built in 1971 The engine was changed from 1600cc to a 1972 flat 1700cc engine in 1974 otherwise nothings been changed std twin vw carbs

[Wildthings]

[1970bay]

But in the book it says i must set them to .20mm or risk some sort of catastrophe

How can i be sure that the valve is fully open??I have noticed that once the valve is fully open the bus engine can be turned quite a lot before there is any other movement ??
_________________
Travels with my camper:
http://flickr.com/photos/30879804@N08/

Built in 1971 The engine was changed from 1600cc to a 1972 flat 1700cc engine in 1974 otherwise nothings been changed std twin vw carbs

[Amskeptic]

[1970bay]

OH i had hoped that the note from vw on the engine indicated sodium valves.
I hope someone will call soon to adjust,if i have ordinary steel valves set to .20mm and the inlet to .15mm would it be a problem??Then IF the valves are sodium it will be ok & if not be noisy ??

Almost as soon as i wrote this post there seem to have been a steady stream of "mechanics" passing by and offering there opinion,the note is not easy to see but it dose say .20 mm for the exhaust
_________________
Travels with my camper:
http://flickr.com/photos/30879804@N08/

Built in 1971 The engine was changed from 1600cc to a 1972 flat 1700cc engine in 1974 otherwise nothings been changed std twin vw carbs

[Wildthings]

What is the part number off your engine? (It is stamped into the case just below the breather). If it is a Porsche or 411/412 part number then your engine wouldn't have come with sodium filled valves no matter the size or year. As Colin noted the sodium filled valves were a feature of the '74 1800 bus engines so the part number would show this as well.

If you do have sodium filled valves you must have one of the last few Type 4 engine on the planet running them.

This is the technical Data page for a '74 bus which in the USA would have had an 1800 engine:

https://www.thesamba.com/vw/archives/manuals/oct73bus/page58.jpg

The specs for both the '73 1700 bus engine and the '75 bus 1800 are both 0.006" or 0.15mm for the exhaust valve.

[Tcash]

It is not 15 mm it is 0.15 mm very big difference.
As posted if you do not know for sure which exhaust valves you have. To be save you set them to 0.20 mm.
To conclude set Intake valves 0.15 mm and Exhaust valves 0.20 mm

The mechanic set my tappets to .4 or .5 mm I'm nor sure which?
0.40 mm is twice the specified specification. Your engine would be making a lot of noise.

Good luck
Tcash

[Tcash]

This is what a rocker set to about 5 mm sounds like. So it has to be 0.5 mm
thnx mayor ratwell
"Hydraulic lifters again; this time the valve adjusting screw had far too much lash (perhaps 5mm) and you can hear the components of the valve train (single push rod) clacking against each other."
http://www.ratwell.com/technical/EngineSounds/SlackRockerArm.mp3

This is what a warm engine sounds like with the valves adjusted correctly.
http://www.ratwell.com/technical/EngineSounds/SolidLiftersWarm.mp3

[1970bay]

I will check the part number in the morning.

The mechanic could not put my bus on the lift this evening.
Tomorrow i will take the cover off let the bus move forward until valves open and see which finger of metal goes into the gap.

How can i tell which is the inlet and which the sodium filled out one??

I hope the one marked "15" fits

I had no idea sodium valves existed i imagined valves were all the same just as spark plugs Until it was mentioned hear Then i rather hoped i had some.When i found the sticker which said i had a wider valve clearance i knew it must be sodium valve

I have been worried about burnt valves since i learnt weak fuel mix can burn the valve.Having immediately googled sodium valve and found they run cooler i was sure i must have them

Tomorrow i hope i find 15 at least and not 4 or 5
_________________
Travels with my camper:
http://flickr.com/photos/30879804@N08/

Built in 1971 The engine was changed from 1600cc to a 1972 flat 1700cc engine in 1974 otherwise nothings been changed std twin vw carbs

[Wildthings]

The two center valves on each head are the intakes. I personally don't know how to tell a sodium filled valve by just looking at the valve stem. I don't think that sodium filled valves are something to wish for as they were quickly eliminated because of the problems they gave.

Keeping your engine well tuned up is the best way to avoid valve and other head problems.

[1970bay]

Yes but how??Increasingly real mechanics are retiring to be replaced with fitters that know nothing other than how to charge a fortune for no work at all.

Sodium or metal valves i will be happy when i find for myself what gap has been set,by a mechanic

Thanks as its not been clear from youtube which valves are which so far. Tomorrow i wil meet my valves I have been told to take a No13 spanner and a screwdriver just in case i want to adjust them
_________________
Travels with my camper:
http://flickr.com/photos/30879804@N08/

Built in 1971 The engine was changed from 1600cc to a 1972 flat 1700cc engine in 1974 otherwise nothings been changed std twin vw carbs

[Wildthings]

[Xevin]

[1970bay]

"Rear Bumper-----#2 exhaust/intake----#1 intake/exhaust----passenger seat "

Now i cant make a mistake Could not be clearer Thanks
_________________
Travels with my camper:
http://flickr.com/photos/30879804@N08/

Built in 1971 The engine was changed from 1600cc to a 1972 flat 1700cc engine in 1974 otherwise nothings been changed std twin vw carbs

[1970bay]

Not done as yet i cant get the cover off i might have to remove the wheel but then i cant check the gap??
_________________
Travels with my camper:
http://flickr.com/photos/30879804@N08/

Built in 1971 The engine was changed from 1600cc to a 1972 flat 1700cc engine in 1974 otherwise nothings been changed std twin vw carbs

[Wildthings]