N20 valve cover cracked

image I know no big deal,,,,a stupid valve cover off of a N20,,,,it was a big deal,,,,we had a lean fuel mixture,,,we first thought we had the typical fuel injectors,,,but spark plugs looked good,,,,we then noticed some oil on top of the valve cover.image I don’t know if you can see it,,,but there was a hair-line crack in the valve cover,,,thank god for a smoke machine,,,,when we smoke tested the valve cover,,,then when we really found the leak,,,,this is the first time we have seen a N20 valve cover cracked.

This entry was posted in Uncategorized and tagged , , . Bookmark the permalink.

10 Responses to N20 valve cover cracked

  1. Brian Clark says:

    Any hints on how to remove. I seem to be hung up on something near the firewall. I double checked and I have all the bolts out and most of the valve cover is lose and free but seems to still be holding on that end is there a pipe or other device back there that is still connected?

    Like

    • You have to remove the vacuum pump at the rear of the valve cover

      Like

      • Brian Clark says:

        That must be it. I did not remove the vacuum pump. Thanks for the tip. It’s tight back there I could not see that well.

        Like

      • Yes ,,,,you will do it by feel,,,the bottom torque screw is the worst

        Like

      • Brian Clark says:

        I was able to remove it by removing both solenoid valves and also the vacuum pump by feeling for the screws it was a size t30 star for the vacuum pump. I replaced the valve cover since I thought that was where the oil leak was coming from (back by the fire wall on the passenger side). Put it all back together and it’s still leaking oil. I am thinking based on location of the oil being above the gasket it’s actually coming out of the vacuum pump itself. There was a small plastic cover on a small valve that seems to have come off. I see some residual oil on it when using a mirror to look back there. I’m guessing oil is leaking past the seals and is being ejected out that exhaust valve.

        Like

      • Check the big vacuum line that comes off the pump,,,check inside the line and see if there is any oil in that line,,,,check the vacuum line that go to the left side of the cylinder head for any oil inside the line,,,,if there is any oil in those lines then the vacuum pump is bad,,,,the vacuum pump is bad internally and pumping oil though the lines.

        Like

      • Brian Clark says:

        There was some oil, also when I took the vacuum pump apart it was full of oil internally. Looks like a bad pump.

        Like

      • Sound like it might be bad,,,,on the plastic cover on the engine,,,is there 2 or 1 vacuum port on it,,,,if there is take off the plastic cover again and turn it to see if any oil comes out of the vacuum ports,,,,if oil does come out then the vacuum pump is bad.

        Like

      • Brian Clark says:

        There is two one is large goes to boost the brakes and there is a small on that’s got a cap on it. The cap was actually blown off and I found it when I took the engine guard off the bottom. I assume when breaking it’s been spitting oil on the exhaust turning the car into an improvisational smoke machine. Thanks for your help on this. I replaced the vacuum pump and will test today,

        Like

    • Did you also remove both solenoid valves at the front of the valve cover

      Like

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s