New problems w/ new engine
#1
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From: Oklahoma
Car: 1992 T/A
Engine: 5.7l 355
Transmission: 4L60
Axle/Gears: 3.42
New problems w/ new engine
Well I might have finally solved the oil leak from the back of the intake, but now I seem to have oil coming from the pass side valve cover through the grommet there. Oil pressure is 60. I also have alot of smoke coming from the inside of the valve covers and also out of the throttle body when I shut the car off. I adjusted the valves earlier today and noticed that oil was coming out of the push rods nice and steady except for #2, it was squirting out. All of the lifters were too tight. After I adjusted #2 it went to a heavy flow instead of a squirt. It smells like it may be running rich and when I go to back up it cuts out on me. I just got done taking the motor out and back in for the second time. I'm running out of patience. I'm not sure where to begin looking for problems, any ideas would be great. I built this motor last year and have only 1000miles on it and haven't been able to drive it for months. Thanks
#2
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From: Oklahoma
Car: 1992 T/A
Engine: 5.7l 355
Transmission: 4L60
Axle/Gears: 3.42
Re: New problems w/ new engine
Well I pulled the pass side breather tube off and noticed an extremely thick white substance inside the tube. So I pulled the throttle body top plate cover off and it was full of a thick white substance and what appears to be oil. It has no distinct smell to it. What could this be? When I replaced the intake gasket I of course got coolant in the motor but I changed the oil before running it. Could it be from coolant still in the motor? I'm really confused. It was so thick it was blocking the passage almost. When I pulled the tube off it made no difference in the way the motor ran. I placed my finger over the nipple in the tb and there wasn't hardly any suction. Any ideas?
#3
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Joined: Jan 2007
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From: eastern mass
Car: 87 firebird none soon
Engine: None
Transmission: none
Axle/Gears: 2.73 10 bolt
Re: New problems w/ new engine
It is probably still coolant in your oil, I ran my engine for a couple of minutes after I got rain in my oil then changed it possibly twice and was good. You should simply heck the dip stick look for milkiness if so do an oil change.
Isn't it coolant that runs through the throttle body I believe it is. When your engine is on it can force oil into the coolant then when it is off it will force coolant into the oil just think of the pressures under these conditions. You may want to do a compression test. Also Look in your coolant reservoir for oil and also in the radiator.
Look in some of the places I have mentioned and post back.
Isn't it coolant that runs through the throttle body I believe it is. When your engine is on it can force oil into the coolant then when it is off it will force coolant into the oil just think of the pressures under these conditions. You may want to do a compression test. Also Look in your coolant reservoir for oil and also in the radiator.
Look in some of the places I have mentioned and post back.
#4
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From: Oklahoma
Car: 1992 T/A
Engine: 5.7l 355
Transmission: 4L60
Axle/Gears: 3.42
Re: New problems w/ new engine
I've checked the dipstick looks like clean oil, but I had planned on doing an oil change due to the coolant left in the motor. The reservoir is clean. I'll be doing a compression test in just a min here. I'm praying it's not the rings.
#5
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From: Oklahoma
Car: 1992 T/A
Engine: 5.7l 355
Transmission: 4L60
Axle/Gears: 3.42
Re: New problems w/ new engine
Well I've done a compression test on the suspect side and I've got 150 on 2 and 4, 140 on 6 and 85 psi on #8. From what I've read that calls for a new set of rings, correct?
#6
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From: eastern mass
Car: 87 firebird none soon
Engine: None
Transmission: none
Axle/Gears: 2.73 10 bolt
Re: New problems w/ new engine
It isn't the rings it's the head gasket most likely, do a pressure test on the cooling system as well to double check its the gasket not the rings.
auto transmission fluid will help the rings add a few cap fulls to the cylinder and crank it with the ingition coil unplugged on the low voltage side and the spark plug out then run it normally check for over heating and then do another compression test on that cylinder.
auto transmission fluid will help the rings add a few cap fulls to the cylinder and crank it with the ingition coil unplugged on the low voltage side and the spark plug out then run it normally check for over heating and then do another compression test on that cylinder.
Last edited by mxcrazed; 03-25-2008 at 03:27 PM.
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#8
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Joined: Apr 2007
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From: Winnipeg, MB, Canada
Car: 1984 Camaro Z28 T-tops
Engine: 350
Transmission: T-5
Axle/Gears: 3.23
Re: New problems w/ new engine
From my understanding, yes. If you add oil to a low compression cylinder and the compression jumps it, it's usually the rings.
#9
Re: New problems w/ new engine
Exactly. When you do a compression test it should be done in 2 parts, wet and dry. After doing the dry test, add a little oil and do it again. When that one cylinder goes back up, you more than likely have a ring failure. That much of a drop could surely make excesssive amounts of smoke come out of the valve cover, and could also certainly push out engine gaskets, making them leak.
#10
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From: Oklahoma
Car: 1992 T/A
Engine: 5.7l 355
Transmission: 4L60
Axle/Gears: 3.42
Re: New problems w/ new engine
Now do I need to do a complete tear down and back to the shop to have the cylinder walls honed or should I just be able to replace the rings and slap it back together?
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