911 valve adjust.

[carrerarsr65]

just got done doing valves. some are still to loose,can i get away with just draining crankcase oil,and not the tank ,seeing the oil only has 5 mins. on it. thanks al from mass.

[Charles Freeborn]

You can do them one side at a time by jacking up first one side then the other. I used a lid from a plastic storage container to catch oil (even put a drain hose on it, which wasn't necessary). Get it up as high as you can, let sit for a half hour or so to drain out of the cam housing.

[Drisump]

How loose are we talking? Better a little loose than too tight. Most of the Guru's will tell you that the clearance becomes tighter with miles and often a freshly adjusted engine makes the most noise.....until the next adjustment. Cheers

[Nick Triesch]

Post above is true. After I adjusted my valves my car sounded like a 67 bug. But after a few thousand miles, it sounds like a 73 bug. Much better.

[john walker's workshop]

Most of the valves I adjust are looser than .004. Don't find tight ones much.

[toddu]

Not to hijack, but - I have about 1,000 miles on a complete rebuild and the ticking drives me crazy. Things were gone back through after the engine dyno. Should I check the gap, or just leave them for a while? Car runs great and is very strong, just very (I think) noisy.

Todd

[Bob Kontak]

Originally Posted by carrerarsr65

just got done doing valves. some are still to loose,can i get away with just draining crankcase oil,and not the tank ,seeing the oil only has 5 mins. on it. thanks al from mass.

Lose a little oil then replace. No biggie. Don't change it.

WHY is there a fat gap? You need to ask yourself this question. What did you NOT do when performing this procedure?

You did spin the crank a couple of times and re-check right? Every single valve? If you did not, there is your problem. You did not perform due diligence on a critical operating parameter on a $6k engine. Why the eff not?

Think how much time this saved you.............. Like negative six hours. You get to do it again.

Next time, read, suck it up and do it correctly.

Call me a prick, but do it right from now on. The effort will serve you well.

Like the car without side skirts.

[cabmandone]

I recently raised the right side, adjusted valves then raised the left and adjusted them. It take a bit of time but if you don't want to lose all the oil it's worth it.

[Bob Kontak]

Originally Posted by toddu

Not to hijack, but - I have about 1,000 miles on a complete rebuild and the ticking drives me crazy. Things were gone back through after the engine dyno. Should I check the gap, or just leave them for a while? Car runs great and is very strong, just very (I think) noisy.

Was anything done that changed the rocker to cam interface? Factory new, our 911's had a 1,000 mile re-adjustment of the valve lash given the parts "wore" into each other. Metal on metal changed lash a bit, even with an oil bath.

If you had rockers re-bushed and the faces ground, new cam, blah blah, the interface should be re-set at 1,000 miles.

[toddu]

Thanks Bob. Yes, different cams, rockers refaced, etc. I'll go ahead and check, adjust as needed.

Thanks!

Todd

[Bob Kontak]

Originally Posted by toddu

Thanks Bob. Yes, different cams, rockers refaced, etc. I'll go ahead and check, adjust as needed.

Thanks!

Todd

My Dad lives in Gastonia. I go down a couple times a year. I have the dial indicator equipment for setting valve lash but it's not really a step change from doing it with feeler gauges. In fact, it is a time soak.

FWIW, Just put that in your hip pocket. Glad to help anytime I can.

[toddu]

Thanks Bob I'll keep that in mind. I'm over in Denver, so not that far from Gastonia. I was thinking of picking up the feeler gauge and the Kirk tool.

Todd

[carrerarsr65]

thanks bob for being so suttle,well said my porsche brother!!

[JSV798]

Got a bit of a shock when I saw your car; thought it was mine! Don't get many in minerva blue. Here's mine for comparison

[Drisump]

Originally Posted by john walker's workshop

Most of the valves I adjust are looser than .004. Don't find tight ones much.

Hey John are you saying that the valve train loosens with miles? If it does, presumably the slack is being created by wear on cam lobes and rockers.....and not tightening with the valve sinking slightly into the head between adjustments.....like I have read on this board. Personally I can't say, since I loosen off adjusters before adjusting down to .0004, I never could weasel the feeler into an adjusted gap without destroying feelers at an alarming rate. My freshly adjusted 85 does have one of the noisiest valve trains (at idle) in the known universe, my 993 with hydraulic lifters is Rolls Royce quiet by comparison. When I adjust valves, I adjust and readjust until a slight tugging is felt on the feeler when you try to move it about. If the feeler falls out when tightening the lock nut....back to square one. John, a ruling on this issue(loosening/tightening with miles) be good, LOL.

[T77911S]

i have pulled the lower valve cover without draining or jacking the car on one side. not a lot came out.