Oil filter?!?
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Northstar Engines and System Technical Discussion Discussion, Oil filter?!? in Cadillac Engine Technical Discussion; ...
  1. #1
    De_Ville is offline Cadillac Owners Member
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    Oil filter?!?

    Hi, just about to change the oil in the Seville -93 N*.
    Hasenīt got time to get a service manual yet. Where is the oil filter placed? Do I need to lift the car at 4-point lift? or is it enough with the jack in the car? Also where is the oil drain plug placed? On the oil pan?

    It is so well filled out in the engine compartment so itīs almost impossible to get a hand down to feel anyting..

    Thanks for help.


    /John from Sweden.

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    Dadillac's Avatar
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    Re: Oil filter?!?

    Quote Originally Posted by De_Ville
    or is it enough with the jack in the car?

    /John from Sweden.
    Never, and I mean never, go under a vehicle, that is supported only by a jack. That is a good way to get killed. Use a set of drive up ramps, and drive the front tires up onto them. Then set the parking brake, and make sure that the key is not left in the ignition (don't want someone to start the car while you are under there). Get under the car, and you will see the oil filter almost immediately. The drain plug is in the oil pan, at the back of the pan. Drain the oil into a suitable container, so as not to polute the environment. Good luck, and be safe.

    Don

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    Re: Oil filter?!?

    You won't find it topside anyway. Do what Don suggests or pay someone!

  5. #4
    De_Ville is offline Cadillac Owners Member
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    Re: Oil filter?!?

    No of course I donīt work under a car that only is jacked. I always have proper support at it.

    So then I know that it is as a regular car at this point. Not easy to know when yourīe new to the N* engine.

    Thanks for the help!

    /John in Sweden

  6. #5
    Boombottz is offline Cadillac Owners Fanatic
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    Re: Oil filter?!?

    Yumpin' Yimminy John,
    Don't scare us like that again!

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    Cool Re: Oil filter?!?

    The oil filter will be underneath around the right front. Slightly older Caddys have a topside oil filter (like mom's old '87 Eldo) but the N*'s do not. Drain plug will be on the bottom of the oil pan. Takes 7 quarts, I know the manual says 7.5 but trust me or do a Search here, but just put in 7. The Mobil 1 filter is a great filter but it has more than one set of threads cut into it and is a true pain in the *** to put on. Use an AC or K&N, but I don't know what's available in Sweden.

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    Re: Oil filter?!?

    When I refill my engine for an oil change, I put in 8 qts. During the oil life cycle, I will only have to add about 3 qts to it. Since I am getting between 11,000 and 12,000 miles on the change, that is pretty good. Also, 8 qts, gets me exactly at the full mark on the dipstick. Just thought I would throw it out there.

    Don

  9. #8
    mcowden is offline Cadillac Owners Connoisseur
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    Re: Oil filter?!?

    Quote Originally Posted by Dadillac
    When I refill my engine for an oil change, I put in 8 qts. During the oil life cycle, I will only have to add about 3 qts to it. Since I am getting between 11,000 and 12,000 miles on the change, that is pretty good. Also, 8 qts, gets me exactly at the full mark on the dipstick. Just thought I would throw it out there.

    Don
    If it's at the full mark on the dipstick when it's cold, the engine is overfilled. It should only be at the full mark when the oil is hot. If it's overfilled, it may be getting churned up by the crankshaft and air can become entrained in the oil. Air makes a terrible lubricant, and this can result in problems. Further, oil vapors will get sucked into the PCV system and can fill up the intake with oil. It can be deposited on intake valves and crud them up with burnt oil as well.

    I would suggest only dumping in 7 quarts with a new filter, which might look a little low on the dipstick, but if you check it hot, it should be just under FULL, which is about perfect. When the dash says to check oil level, add 1 quart and drive it till it says it needs more. When the dash says change it, change it with 7 fresh quarts again and repeat. It's much better to be a little under FULL than to be overfull. The engine will run fine with less than 5 quarts in it, so don't worry at all about only dumping 7 in there.
    Mike

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    Re: Oil filter?!?

    So GM designed the dipstick wrong? How could this be? I have read all of the previous posts, about overfilling, and that oil (the overfilled amount) burning off quickly. But my oil doesn't burn off quickly. It uses less oil than almost every other engine that I have ever owned. Also, I usually check my oil about 30 min after driving home from work (40 miles), so it is checked hot.

    Don

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    Re: Oil filter?!?

    The Owners Manual says to check the oil when it's warm. Their are no "hot" or "cold" levels, only "min" and "max". The manual says to fill it somewhere between. It also warns against overfilling:
    "Don’t add too much oil. If your engine has so much oil that the oil level gets above the upper mark that shows the proper operating range, your engine could be damaged"
    So I wouldn't depend on letting the excess "burn off" be a smart idea for the same reasons mcowden mentioned.

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    Re: Oil filter?!?

    With 8 qts, I am right at the full mark. When I check the oil, there is no foaming on the dipstick, so the crankshaft is not whipping it into a malted. I just don't buy into the point that the dipstick, on like 100's of thousands of Northstars, is made wrong. I have read here before, that the crankcase is full, when the oil is at the lower mark on the dipstick, and do not fill it more than that. I have also read, that if you do fill it to the top mark, that it is overfilled, and that the overfilled amount (1 quart maybe), will burn off very quickly. Tending to lead to the oil comsumption theory. But like I said, I burn off very minimal amount of oil. Like 1 qt every 3-4 thousand miles. So for my N*, 8 qts is the right amount.

    Don

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    mcowden is offline Cadillac Owners Connoisseur
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    Re: Oil filter?!?

    Quote Originally Posted by Dadillac
    With 8 qts, I am right at the full mark. When I check the oil, there is no foaming on the dipstick, so the crankshaft is not whipping it into a malted. I just don't buy into the point that the dipstick, on like 100's of thousands of Northstars, is made wrong. I have read here before, that the crankcase is full, when the oil is at the lower mark on the dipstick, and do not fill it more than that. I have also read, that if you do fill it to the top mark, that it is overfilled, and that the overfilled amount (1 quart maybe), will burn off very quickly. Tending to lead to the oil comsumption theory. But like I said, I burn off very minimal amount of oil. Like 1 qt every 3-4 thousand miles. So for my N*, 8 qts is the right amount.

    Don
    Do what you like, Don, and I'm certainly not an expert, but if you're checking it cold and it's full, you've overfilled it. It's pretty clear in the manual that it should be checked when hot. The dipstick isn't wrong. It's your method that needs revision. If it's overfull, it's not going to be "burned" off, it's more likely to be whipped up by the rotating crankshaft and the vapor sucked into the intake. No good can come of that. Even if it was burned up, there's nothing good about that either. Your reasoning escapes me. Good luck with your car, Don, and I hope no one else will take your advise as far as how to check the oil level. Again, it's much better to be a little underfull than to be overfull. There's no disputing that.
    Mike

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    Re: Oil filter?!?

    FWIW, I once did a comparison on hot vs cold. I checked the oil level hot when I got home from work (40 mile drive at 70 mph) and again in the morning. The level difference on the stick was no more than 1/8" if it was that much.

    Also under the FWIW catagory, I only put 7 qts. in at oil change (it's easier that way) and add a qt. when neccassary.

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    Re: Oil filter?!?

    Quote Originally Posted by mcowden
    Do what you like, Don, and I'm certainly not an expert, but if you're checking it cold and it's full, you've overfilled it. It's pretty clear in the manual that it should be checked when hot. The dipstick isn't wrong. It's your method that needs revision. If it's overfull, it's not going to be "burned" off, it's more likely to be whipped up by the rotating crankshaft and the vapor sucked into the intake. No good can come of that. Even if it was burned up, there's nothing good about that either. Your reasoning escapes me. Good luck with your car, Don, and I hope no one else will take your advise as far as how to check the oil level. Again, it's much better to be a little underfull than to be overfull. There's no disputing that.
    You ought to reread my third post on this subject. It clearly states that I check my oil, about 30 minutes, after a 40 mile commute from work. So am I checking it cold? I think not.

    Don

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    Re: Oil filter?!?

    Quote Originally Posted by mcowden
    If it's overfull, it's not going to be "burned" off, it's more likely to be whipped up by the rotating crankshaft and the vapor sucked into the intake.
    Oil vapor? If the PCV system picks up any raw oil and sends it through the intake it would actually end up being burned off (you're right though, it would coat the downstream part of the intake manifold which can't be good.)

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