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914World.com _ 914World Garage _ Valve Adjusting Screws
Posted by: Rhodes71/914 Dec 26 2004, 10:43 PM
I'm putting back together a 2L I bought this fall. I did not split the case just new rings on the pistons. Took the heads to a local VW shop the guy cleaned them up and checked out the valves and told me they looked fairly new.
So I got the heads back on the engine and adjusted the valves. On cylinder #2 (left side of pic) I had to back the adjusting screws way out to get them correct. I have never seen them like this on any type IV I have done. Should I be concerned? And why so different than the others.
Attached image(s)
Posted by: scott thacher Dec 26 2004, 10:52 PM
check the push rod, if its not seated right it can do that
also is the cam pushing the push rod
or did some one put spacers under the rockers to make up for a fly cut then leave em out on one side
other wise it could be bad
Posted by: Aaron Cox Dec 26 2004, 11:08 PM
| QUOTE (scott thacher @ Dec 26 2004, 09:52 PM) |
| check the push rod, if its not seated right it can do that also is the cam pushing the push rod or did some one put spacers under the rockers to make up for a fly cut then leave em out on one side other wise it could be bad |
good suggestions...
spaced rockers, unseated pushrod, wrong pushrods etc
Posted by: SGB Dec 26 2004, 11:32 PM
I think its gotta be the rocker arm shims missing. In fact, it almost looks like they could both be stacked under the #3 rocker.
Posted by: Rhodes71/914 Dec 26 2004, 11:46 PM
First thing I checked was that the pushrods were seated correctly in the rockers. Pushrods all went back in the same place as they came from. There were no spaces at all under the rockers.
Posted by: Aaron Cox Dec 26 2004, 11:56 PM
PS: now would be a good reason to tap the head breather boss....install a barbed fitting 
Posted by: Rhodes71/914 Dec 27 2004, 12:09 AM
| QUOTE (Aaron Cox @ Dec 26 2004, 09:56 PM) |
| PS: now would be a good reason to tap the head breather boss....install a barbed fitting |
More info please
I think I've heard it talked about but
Posted by: Aaron Cox Dec 27 2004, 12:12 AM
| QUOTE (Rhodes71/914 @ Dec 26 2004, 11:09 PM) | ||
More info please I think I've heard it talked about but |
1) drill
2) Tap
3) install barbed fitting for breather hose
(these are off a 49 state 75 or76???)
Attached image(s)
Posted by: Rhodes71/914 Dec 27 2004, 12:19 AM
Ok so why drill and and tap when there is already a threaded hole there? What does this do for the head, that hole goes into the exhaust valve. Yes 75 engine.
Will have to remove head to to any drilling, tapping. Maybe I will have to anyway to solve my problem.
Home from college Aaron? My first year in college it was fun going home, after that it was counting the days.
Posted by: Aaron Cox Dec 27 2004, 12:27 AM
| QUOTE (Rhodes71/914 @ Dec 26 2004, 11:19 PM) |
| Ok so why drill and and tap when there is already a threaded hole there? What does this do for the head, that hole goes into the exhaust valve. Yes 75 engine. Will have to remove head to to any drilling, tapping. Maybe I will have to anyway to solve my problem. Home from college Aaron? My first year in college it was fun going home, after that it was counting the days. |
that should be a breather port..... late model heads didnt have bosses on the for the breather hose....
it doesnt look threaded in the picture
College: yeah, love being home.... only a third done with freshman year :(PIC 
do THIS - head breather....
Posted by: Rhodes71/914 Dec 27 2004, 12:38 AM
Oops should have paid more attention to what you circled in your picture, my bad.
What size do most use and where do you run the hose, looks like a good thing to do.
Posted by: SLITS Dec 27 2004, 08:30 AM
| QUOTE (Rhodes71/914 @ Dec 26 2004, 09:43 PM) |
| I'm putting back together a 2L I bought this fall. I did not split the case just new rings on the pistons. Took the heads to a local VW shop the guy cleaned them up and checked out the valves and told me they looked fairly new. So I got the heads back on the engine and adjusted the valves. On cylinder #2 (left side of pic) I had to back the adjusting screws way out to get them correct. I have never seen them like this on any type IV I have done. Should I be concerned? And why so different than the others. |
If the machine shop reground the valves and seats, they could have sunk these two valves way deep in the seats (in other words, time for valve/seat replacement). It generally costs extra if you want the valve stem heights all the same.
Just a guess.............
Posted by: Gary Dec 27 2004, 08:42 AM
| QUOTE (Rhodes71/914 @ Dec 26 2004, 09:46 PM) |
| First thing I checked was that the pushrods were seated correctly in the rockers. Pushrods all went back in the same place as they came from. There were no spaces at all under the rockers. |
Dude,
It ain't the seated in the rockers part that's hard to see. It's the seated in the lifters part. I just went through this after pulling my pushrods and pushrod tubes to replace the O-rings. When you insert the pushrods down into the lifters, it's tricky to know that they're actually snuggled down in that lifter. Ajust the adjusting screws all the way back into the rocker, which should loosen up the pushrod from the lifter. Jiggle the pushrod up and down until it seats home. You'll get a nice"thunk" feel. From your pictures, it looks like the lifters are shimmed about the same side to side, and if you just had the shop clean up the valves rather than a full valve job, I wouldn't suspect hte seats. Sometimes it's the easy stuff that gets you (I hope that's the case for you!).
Posted by: Rhodes71/914 Dec 27 2004, 11:04 AM
| QUOTE |
| If the machine shop reground the valves and seats, they could have sunk these two valves way deep in the seats (in other words, time for valve/seat replacement). It generally costs extra if you want the valve stem heights all the same. |
No machining was done to the valves or seats just a check.
| QUOTE |
| When you insert the pushrods down into the lifters, it's tricky to know that they're actually snuggled down in that lifter. Ajust the adjusting screws all the way back into the rocker, which should loosen up the pushrod from the lifter. Jiggle the pushrod up and down until it seats home. You'll get a nice"thunk" feel. |
I am going to pull the rockers off completely and make sure they are seated correctly on the lifter, thought I did the first time.
Thanks everyone I'll let ya know.
Posted by: Rhodes71/914 Dec 28 2004, 01:20 AM
Something wasn't seated correctly. Loosened the rockers, made sure the pushrods were seated correctly and tightened it back up.
Adjustment is in line with all the other cyl. I feel much better now.
Hoping to make a dent in the transplant during the holidays. 
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