A Little TLC for the 911

Posted on 21 Jan 10:58
We think we have the oil temperature concerns addressed now. With some 5W40 oil in there and a cover over the engine oil cooler I think we should be fine. Time to move on to other issues: poor running and "popping" noises at idle!

We read on the forums that the popping noises are probably due to intake leaks; either from aging vacuum lines, oil filler gasket or, more than likely, intake manifold. It seems the bolts come loose and they can suck in the paper gaskets! These issues might also account for the rough idle. Of course there are other possible causes for the idling so we decided to look at plugs and ignition too.

So off with the distributor cap. Doesn't look pristine in there.




Neither does the rotor arm




We found these loose wires in front of the engine too. Can't believe after how many times we've had the engine out we haven't noticed them before. We must have forgotten what they were previously for, surely.




Plugs all look OK though the gaps were a little tight.




Uh Oh, another oil leak. Put it on the list.




So we gapped the plugs, cleaned up the cap and rotor, checked the oil cap gasket, looked around for deteriorating vacuum lines and checked the intake manifold bolts. Every bolt was loose! Not hand tight loose but almost. We torqued them back down and fired it back up, hoping that would be sufficient to sort it out for now.

It was Runs like a champ again. I think we'll plan on removing the intake manifold and replacing the gaskets and vacuum lines next time the engine is out. Which, judging by the proliferation of oil leaks recently will be quite soon.

Next we are off to Sno*Drift rally with the car to do some spectating and sell some wheels! Stay warm.
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