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Car Forum / Porsche / Porshe 944 / July 2005Was changing the sparkplugs and found oil in the cylinder!
So, on a long driver over the 4th of July weekend, I noticed some hesitation in the car at lower speeds. As the weekend progressed, it sounded like the car was misfiring. When I got back home on Monday, I pulled the spark plug wires. The second spark plug chamber (second from the front) has a significant amount of engine oil in it (guess this could have caused the misfire, eh? :) Anyway, there was also a silicone type substance along the top portion of the cylinder. This leads me to believe that a seal between the engine block and the head cover has given way (my brother-in-law called this a "top side leak"?) Question time: 1. How likely / common is this? 2. If it is that gasket, how do I replace it? What is name of the part that would need to be replaced? 3. Is this a likely cause of the misfiring and hesitation? On a side note, I just bought this car not a month ago, and as I go I'm finding all kinds of things that were covered up. Alot of the repairs done by the previous owner were done in a very ghetto-a.s style. I hope this isn't indicative of your average 944 owner (as opposed to the fine people who lurk in this newsgroup ;) At any rate, if I ever see the previous owner on the street, I'm going to kick him in the nuts. But that's for another day..... I have had oil build up in spark plug cavity also and is due to reusing plug washer. You need to put new washers on when cleaing plugs and torque them down to specs. You could also have excess oil going into combustion chamber from worn valve stem seals. I have this problem on my number one cylinder. Other questions can be best answered by consulting shop manual at www.clarks-garage.com. I believe you are referring to the cam box to head gasket leaking???? Previous owner probably used some silicone rubber instead of purchasing a gasket. Small job to replace. > I have had oil build up in spark plug cavity also and is due to reusing > plug washer. You need to put new washers on when cleaing plugs and [quoted text clipped - 5 lines] > head gasket leaking???? Previous owner probably used some silicone > rubber instead of purchasing a gasket. Small job to replace. Just so I know we're talking the same thing: I'm talking about the plate on the top left side of the engine block. It says "Porsche" on it (mine is red). I'm guessing there is a gasket that seals the gap in the spark plug cavity between the cam box and the engine block. Is it reasonable for this gasket to leak? Also, it looks like the plate is held on by about 10 bolts. Anything else to be aware of here? Thanks! Yes, you need to take the cam box off, clean the surfaces carefully and put a new gasket on. You might get more help here if you identified the year and specific model. Orientation is typically from the drivers seated postion. Cam box on the right. Buy a copy of the Haynes manual at your local book stockist. > Yes, you need to take the cam box off, clean the surfaces carefully and > put a new gasket on. [quoted text clipped - 6 lines] > > Buy a copy of the Haynes manual at your local book stockist. Sorry. The car is a 1990 944 cabriolet. That is part of the problem, as the haynes clearly cuts off at 1989. Much of it is correct, but I have noticed some glaring differences. I found on a parts website a listing for "valve cover gasket set." After looking into it further, it looks like this is what I need. The haynes I have (as well as clark's garage) has no mention of the torque settings for the cam box bolts. Any idea where this can be found? Cya. Scott. 33 ft/lbs. The tappets need to go back in the same holes they come out of. Use grease, chord or wire to hold them in temporarily when reassembling. Put engine to TDC and slacken the cam belt. Mark position with white paint on pulleys and belt. > 33 ft/lbs. The tappets need to go back in the same holes they come out > of. > Use grease, chord or wire to hold them in temporarily when > reassembling. > Put engine to TDC and slacken the cam belt. Mark position with white > paint on pulleys and belt. I'm in the process of doing that. I started taking the bolts out. Got all the way to the last one in the back upper left-hand corner. The $*#&#^ is rounded out. Let's see what a local tool place has for me tomorrow. Hopefully one of the local junkyards will have a recent 944 that I can take a bolt from. This is still lots of fun though :) > 33 ft/lbs. The tappets need to go back in the same holes they come out > of. > Use grease, chord or wire to hold them in temporarily when > reassembling. > Put engine to TDC and slacken the cam belt. Mark position with white > paint on pulleys and belt. I had to cut one rounded bolt out, but other than that the replacement looks to be a success. I ran it for a little while today and there was no oil in my no. 2 spark plug chamber. There are a few places online that should have quotes back to me tomorrow on replacement bolts. It should be noted that in my case, I didn't have to go to TDC or slacken the cam belt as it was only necessary to re-gasket the valve cover. BTW, thanks for your help over the past week Mr....uh...darthpup.. uh...sir. If you have more than 30,000 miles on the cam timing belt would recommend a replacement. If it breaks you will have a little job to do on the head replacing bent valves. Your engine must have an autotensioner for cam belt? scott - go download the full porsche manual - it's on the web, I've posted the link numerous times - it will be a great help - haynes is not up to the task >> Yes, you need to take the cam box off, clean the surfaces carefully and >> put a new gasket on. [quoted text clipped - 21 lines] > Cya. > Scott. go up to Cannelll's website and download the PET6 program and ALL of the workshop manuals, >> I have had oil build up in spark plug cavity also and is due to reusing >> plug washer. You need to put new washers on when cleaing plugs and [quoted text clipped - 18 lines] > > Thanks! > So, on a long driver over the 4th of July weekend, > I noticed some hesitation in the car at lower speeds. [quoted text clipped - 10 lines] > a seal between the engine block and the head cover has given > way (my brother-in-law called this a "top side leak"?) > Question time: How likely / common is this? ----> depends on how many miles you have on it, higher mileage cars are prone to leaks, it is not under any kind of pressure like a head gasket 2. If it is that gasket, how do I replace it? ----> you will need to remove the timing belt then unbolt the cam tower, take care to not let the lifters fall out, best left to a mechanic unless you really knowabout 944's. couple of hundred bucks for a shop to do it... <>What is name of the part that would need to be replaced? ---> Sounds like a leak on the Cam Tower, has a gasket, 3. Is this a likely cause of the misfiring and hesitation? ----> not really unless the spark plug boot is bad and causing shorting (look at the running engine at noght with no lights, if the are wire issues, you will see a really nice light show.... > On a side note, I just bought this car not a month ago, > and as I go I'm finding all kinds of things that were covered [quoted text clipped - 5 lines] > At any rate, if I ever see the previous owner on the street, I'm > going to kick him in the nuts. But that's for another day..... |
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