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Old 02-10-2010, 10:44 PM   #1 (permalink)
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Default 2005 Forenza - Oil light/engine noise

My girl has a 2005 Forenza 2.0L with 128k miles. It has been leaking some oil for a while and I can't really tell where it is coming from. Looks like coming from almost everywhere. Anyway, today she was in traffic and noticed the oil light was on (hopefully it had just come on), she starts to pull over in to a parking lot and the engine was making a noise then as she killed it she noticed smoke coming from under the hood (she said it had a sweet smell so I know it is coolant). I went to the car and no significant oil is under the car and no more on the engine than is normal for it. The oil level is normal (at the max line) and the coolant is about 1 gallon low. I start the car for a second and it starts fine but has a rattle/tapping that sounds like the valvetrain and the oil light stays on. I only ran it for about 5-10 seconds.

I will get it towed tomorrow, but I am wondering if anyone else has had something like this? I am assuming oil pump, oil pump gear, pickup tube, or something like that. Could it be anything else?

I have a service manual, but it seems to be for a 1.8L non USA. But for other things (replacing timing belt) it was close enough to help with the work.
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Old 02-10-2010, 11:14 PM   #2 (permalink)
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it sounds like you blew your head gasket. hopefully you didnt crack the head. check the oil and see if it looks like there is antifreeze mixed in. when the head gasket goes antifreeze will start to leak into the cylinders and mix with the oil.
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Old 02-11-2010, 06:43 AM   #3 (permalink)
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Quote:
Originally Posted by 7-even View Post
it sounds like you blew your head gasket. hopefully you didnt crack the head. check the oil and see if it looks like there is antifreeze mixed in. when the head gasket goes antifreeze will start to leak into the cylinders and mix with the oil.


Thats a good possibility, but I saw no evidence of coolant in the oil. Would a blown head gasket cause very low oil pressure? I guess if it thinned the oil enough it would.
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Old 02-11-2010, 10:37 AM   #4 (permalink)
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Ok, I got a bit more information today. She said she remembered about 40 miles before the oil light came on, her inside window started fogging up really and she could smell a sweet smell. That tells me the heater core was leaking. No coolant is inside, but it must have leaked outside somewhere. Anyway, so my guess is one of two possibilities:

1) it got so hot it cracked the head and this resulted in loss of oil pressure
2) it got so hot it spun a bearing and caused loss of oil pressure.

However how do I figure out which problem without taking the head off? I guess I could fill back up with coolant and start it up and see what happens. But if it is a spun cam bearing, how do I tell which one it is when I take off the valve cover?
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Old 02-11-2010, 10:49 PM   #5 (permalink)
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The head acts as its own set of cam bearings. It sound like the engine is cooked, as well as possibly needing a heater core. Right now new longblocks are backordered so you have to buy a shortblock and head to get the ball rolling again.
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Old 02-14-2010, 01:13 PM   #6 (permalink)
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Thanks for the info. I have taken off the valve cover and there is some solid gunk in there, but the cam/bearing surfaces look ok. No signs of too much heat besides the baked on oil.

The coolant leak was just a hose. So far no evidence of a cracked head or blown headgasket.

I took the oil pan off and the oil pickup tube was completely clogged. I cleaned it and I'm letting it soak in mineral spirits. Should I take the oil pump off to check its condition or would you just put everything back together? Do I have to do anything special to prime the oil pump? Also, it doesn't look like there is any sort of gasket on the oil pan. I looked online at exploded diagrams and they don't show a gasket either. But the service manual says "coat the new oil pan gasket with sealant".
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Old 02-14-2010, 09:22 PM   #7 (permalink)
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stock there is no gasket. but there is one available now.
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Old 02-14-2010, 10:47 PM   #8 (permalink)
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Actually the ealy build engines did have a gasket but they tend to leak. A good bead of sealer is all that's needed. As far as the oil pump, I'd try it out first before delving into the the pump-you have to disassemble the whole front of the engine as well as the pan and sump. If you have clean oil going to the pump it should be OK.
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Old 02-15-2010, 01:30 PM   #9 (permalink)
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I had already purchased an oil pan gasket, but it ended up not being for the 2005 Forenza (even thought they said it was) . It looks like nobody makes a gasket anyway. I guess I will just go with the sealant. Thanks.
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