oil pump went out and motor knocking now...
06-04-2015, 11:15 PM
#1
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oil pump went out and motor knocking now... So, I lost all oil pressure and decided to drive it the few miles how and believe I spun a couple main bearings cause its knocking now. I almost got the motor out but I'm trying to decide if I should rebuild this one or if I should buy one out of the junkyard? I am building this car but need to get it running again soon. If anybody has any idea's please let me know.
06-04-2015, 11:40 PM
#2
You probably already know this but when you lost oil pressure you probably could have repaired it for minimal cost if you would have towed it home.
The fix is going to depend on your budget, A junk yard motor is probably the cheapest way to go but you don't really know what you're getting. Cost to rebuild what you have is going to cost quite a bit more and it might even be cheaper to just by a new short block.
The fix is going to depend on your budget, A junk yard motor is probably the cheapest way to go but you don't really know what you're getting. Cost to rebuild what you have is going to cost quite a bit more and it might even be cheaper to just by a new short block.
06-04-2015, 11:52 PM
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So did I spin mains?? How much am I looking at to rebuild this motor? I found an 97 lt1 motor with no intake but its got aluminum heads and mine has iron would this block work? Can u use any 350 block?
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06-05-2015, 03:46 AM
#8
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oil pump went out and motor knocking now... The LT1 is a special design. Some parts are interchangeable, but many are not. You'll want an LT1/4.
Honestly, if you really need to get it going again, you can get a motor of Craigslist or re-ring/bearing kit (go with the impala head gaskets too).
Honestly, if you really need to get it going again, you can get a motor of Craigslist or re-ring/bearing kit (go with the impala head gaskets too).
06-07-2015, 07:10 AM
#12
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You won't know anything until you get the engine apart. More than likely all the bearings are bad and you will need to have the crank polished. If you have a knock then you may have cylinder head damage to add onto that. Having a machine shop do a rebuild just the short block you are looking at a minimum of $1000 if they can reuse all of the rotating assy including pistons. The good news in that is you'll have a brand new engine. If you go with a junkyard motor you don't know what you'll be getting. Only way I'd buy one is if I could see it run for myself and verify oil pressure.
06-07-2015, 01:46 PM
#13
Given that swapping an engine in a 4th gen car isn't as easy as many other cars, I'd want to make sure the engine I was getting was fully operational. That leaves you with two options, in my opinion. Option one, rebuild the one you have. Option two, buy a '93-'97 Camaro/Firebird that's either wrecked or trashed, but has a good engine that you can hear run, before you buy the car.
06-07-2015, 05:05 PM
#14
Oil pumps don't often fail, loss of oil pressure is often an internal leak like loose bearings.
Iron head motor suggests this thing blew an engine previously if an f-body since they came with aluminum heads.
What is the car? The more info you give us the easier it is to help.
Iron head motor suggests this thing blew an engine previously if an f-body since they came with aluminum heads.
What is the car? The more info you give us the easier it is to help.
06-07-2015, 08:16 PM
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It's a 95 firebird formula.. So I bought an lt1 from a junkyard and im putting it in as we speak. It's out of a 96 Camaro. There is a plug on passenger side and I dnt knw what it plugs into? Also the motor that was in it was a 4.3l lt1 (L99) didn't knw that but can I use the balancer for the 4.3 on the new motor? Is there anything else that I have to change
06-08-2015, 05:21 AM
#17
It's a 95 firebird formula.. So I bought an lt1 from a junkyard and im putting it in as we speak. It's out of a 96 Camaro. There is a plug on passenger side and I dnt knw what it plugs into? Also the motor that was in it was a 4.3l lt1 (L99) didn't knw that but can I use the balancer for the 4.3 on the new motor? Is there anything else that I have to change
BTW, you're asking about the balancer. Doesn't the engine you bought have one? If not, do you mean the opening in the timing cover has been "open", for some period of time??
06-08-2015, 06:36 AM
#18
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You need to be more descriptive. Perhaps some pics would help your cause. You need to use the knock sensor for your '95 PCM and timing cover since you do not have a crank position sensor as the '96-'97's did.
These cars have been around long enough I'm sure there's all kinds of different combos out there no one on the internets has heard/read about.
These cars have been around long enough I'm sure there's all kinds of different combos out there no one on the internets has heard/read about.
06-08-2015, 10:59 AM
#19
You've got a few electrical differences to tackle. The '96 cars were OBDII compliant. The vented Optispark is just one of the differences....
BTW, you're asking about the balancer. Doesn't the engine you bought have one? If not, do you mean the opening in the timing cover has been "open", for some period of time??
BTW, you're asking about the balancer. Doesn't the engine you bought have one? If not, do you mean the opening in the timing cover has been "open", for some period of time??
The accessory bracket and crank hub are different between the years AND body type so.....have fun.
06-08-2015, 02:29 PM
#20
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