Question about 1991 Volvo 740

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Oil leaks could it be camshaft seals or valve cover gasket? it seems to be leaking from the top down

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  • Anonymous Mar 30, 2014

    I need to change my valve cover gasket

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Much more likely that the VC gasket's are the problem

Posted on Jan 26, 2009

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Oil is pouring out of the bottom of the timing cover


bad gasket,valve cover (top and leaks down hidden) if gasket
if not VC , then seals.
no engine stated, there are many engines used.
On the I4 engine, (4 banger) it has a cam seal and a crank seal
they can and do leak.

Nov 30, 2013 | 1996 Honda Accord

4 Answers

Oil leak on driveway coming from front of engine


Dear Sir,
Here is the oil leaking Problem Identifying Technique

Engine oil leaks from the valve cover gasket are common.

  • The intake manifold plenum gasket may leak and cause increased oil consumption/burning and a spark knock during acceleration; the gasket should be replaced.
  • External oil leaks from valve cover gaskets, intake gaskets (front or rear), and the rear crankshaft (rear main) seal area are common. The rear main seal is an unlikely source. Normally, the bearing cap mating surfaces (as well as the sealing surface between the oil pan and bearing cap) are the source for the leaks.
  • Engine oil leaks at the distributor can be misdiagnosed as leaks from theintake manifold seal, oil pan gasket, or rear crankshaft (rear main) seal. A revised distributor is available if oil is found inside the distributor.
  • If the oil filter casing shows signs of distortion from excessive oil pressure, theoil pump should be replaced.
  • Often misdiagnosed as a leaking oil filter gasket, the oil filter adapter can seep from between the adapter and engine block.
  • Carbon buildup on the top of the piston is common. As the buildup increases with mileage and over time, symptoms may vary from light ticking, to ticking/hammering, to hammering/knocking noises. Fuel injector cleaner often solves the problem.

  • I think it helps to analyse u r Problem

    Nov 02, 2012 | Toyota Cars & Trucks

    1 Answer

    Looking to do a valve cover gaskit, is it very hard to do?


    yes it is, basicaly because there is no valve cover gasket. if it leaks from the seem that would look like a valve cover leak then you have to pull off the top plate wich is actually the upper cam bearing. special tools are needed to remove or you WILL bust the front camshaft thrust plates off. they are part of the head

    Sep 01, 2010 | 2001 Volvo C70

    1 Answer

    Leaking oil left side of motor


    Since it's not clear whether you mean driver side or passenger side, I will address both.

    On the driver side, the most common leak is from the distributor. This can be caused by the distributor shaft exterior o-ring, or it can be caused by the distributor shaft interior bearing seal. To determine which it is, remove the distributor. First detach the spark plug wires, then undo the bolt that holds the distributor to the head, then pull the distributor out of the head. You will see the o-ring on the exterior of the distributor shaft. This is a $0.50 part, so just replace it with a new one as long as you have the distributor out. The bearing seal is on the inside of the distributor. To inspect it, undo the three bolts holding the cap to the distributor body. Pop the rotor off the shaft, the unclip the inside plastic cover. If you see any oil inside the distributor or the distributor cap, this means the seal is leaking and must be replaced. You can get a seal and bearing replacement kit from kbox.ca. Or, you can just buy a new distributor. Note: To get the distributor back in place you must align the shaft correctly with the notch in the camshaft. There is a right way and a wrong way. If the shaft seems to be aligned but does not go in, pull it out and rotate it 180 degrees, then put it back in.

    The other possibility on the driver side of the engine is the main seal between the engine and transmission. If this is the case, you would have to either drop the transmission or pull the engine to replace it.

    What if the oil is leaking on the passenger side? If it's coming from behind the timing belt cover, there is a camshaft seal and a crankshaft seal, both of which can leak oil. To get to them, you will have to remove all accessory belts and the alternator, remove the exterior crankshaft pulley, remove the engine mount (support the engine) and the timing belt covers, remove the timing belt, then the crankshaft pulley and/or camshaft pulley, whichever is necessary to replace the leaking seal(s).

    Where else could oil be leaking from? If it's coming out from near the top of the engine, that's the valve cover gasket. Remove the valve cover and replace the gasket. While you're at it, replace the spark plug tube seals.

    If it's coming out from near the bottom of the engine, it could be the oil pan gasket. Remove the oil pan and replace the gasket.

    One more possibility for oil leakage: The head gasket. But in this case you would have noticed other symptoms besides just an oil leak.

    Good luck! Let us know how it turns out.

    Mar 21, 2010 | 1993 Toyota Corolla

    2 Answers

    1995 toyota camry leaking oil from behind the timing belt cover. Isn't this a major repair? Is the leak more than likely a camshaft seal?


    either the cam seals are leaking or the valve cover gasket is leaking into the timing cover. maybe even head gasket... but in most of the cases like oil leaking from behind the timing cover the camshaft seal is the faulty .and replacing the camshaft solves the problem. no its not a costly part to be replaced. you can get it from a local car repair tech or from www.autozone.com service center.they also deal in parts. This will help. Thanks please keep updated.please please do rate the solution positively .thank you for using fixya

    Mar 19, 2010 | 1995 Toyota Camry

    1 Answer

    I replaced valve cover gaskets and camshaft seal and I still have small leak on driveway. oil pan gasket isn't leaking. any other common places the leak may be coming from?


    crankshaft seal rear main seal oil pressure sending unit to name a few you really have to look closely to locate your leak.

    Dec 01, 2009 | 1996 Lexus ES 300

    3 Answers

    Oil leak in my 92 jeep cherokee


    The most likely place for an engine to start leaking oil (when it's coming from the top and not the bottom) is around the valve covers -- the gasket goes bad. Next most likely is camshaft seals.

    Sometimes just tightening the valve cover botls will stop it or at least reduce it.

    Apr 29, 2009 | Jeep Cherokee Cars & Trucks

    1 Answer

    Spark plugs


    Who ever told you it was the Valve cover gaskets was correct. On the valve cover gasket around where the spark plug goes down though the head there is a seal made onto the valve cover gasket called the spark plug well seals. when replacing the valve cover gasket it will come with these seals and it will take care of your oil leaking into spark plug holes. Hope this has helped and if you need anymore assistance I would love to help.

    Sep 11, 2008 | 1994 Lexus GS 300

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