Oil pump siezed on 3.8L
11-22-2014, 10:48 PM
#1
JK Enthusiast
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Oil pump siezed on 3.8L
WHat are the chances an oil pump would sieze? Oil pumps usually wear out by becoming loose and sloppy until the pressure gets low. A siezed pump indicates no oil or water in oil. A siezed pump is a very abnormal failure mode right?
Dealership replaced oil pan and timing cover gaskets on my 2008. They say they started it and let it run 40 minutes to burp cooling system and it suddenly shut down. The oil pump siezed. I went to shop to see it but i should have pulled dip stick to look for low/ no oil or water in oil but i did not. Big mistake on my part
Dealership replaced oil pan and timing cover gaskets on my 2008. They say they started it and let it run 40 minutes to burp cooling system and it suddenly shut down. The oil pump siezed. I went to shop to see it but i should have pulled dip stick to look for low/ no oil or water in oil but i did not. Big mistake on my part
12-12-2014, 01:39 AM
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Oil pump SEIZED 
No oil for 40 minutes
Shit happens in the chain of events. Now the crankshaft lobe that drives it and your rings and bearings
You want the old oil pump given to you. Things might have changed since the old days...but the pump is usually arm (lever) driven from a cam lobe on the crankshaft. If the actuator arm shows wear or an orangey/bluish discolouration on an old style engine like these....they ran it without oil. Ask them why 40 minutes to circulate fluid as well. Come on this wasn't Joe in his backyard with a case of beer was it?
Why was it in for oil pan and timing chain cover work
Something's not quite right here sheriff
No oil for 40 minutes
Shit happens in the chain of events. Now the crankshaft lobe that drives it and your rings and bearingsYou want the old oil pump given to you. Things might have changed since the old days...but the pump is usually arm (lever) driven from a cam lobe on the crankshaft. If the actuator arm shows wear or an orangey/bluish discolouration on an old style engine like these....they ran it without oil. Ask them why 40 minutes to circulate fluid as well. Come on this wasn't Joe in his backyard with a case of beer was it?
Why was it in for oil pan and timing chain cover work
Something's not quite right here sheriff
Last edited by 101gargoyles; 12-12-2014 at 01:42 AM.
12-12-2014, 04:59 AM
#4
JK Jedi Master
The 3.8L oil pump is direct drive on the front end of the crank shaft, in the timing chain cover.
I'd have to see it before I'd believe it seized. And why would it seize, unless there was no oil in it?
If that's the case, it was probably due to improper assembly when they reinstalled the timing chain cover.
I'd have to see it before I'd believe it seized. And why would it seize, unless there was no oil in it?
If that's the case, it was probably due to improper assembly when they reinstalled the timing chain cover.
12-12-2014, 09:10 AM
#5
JK Freak
The 3.8L oil pump is direct drive on the front end of the crank shaft, in the timing chain cover. I'd have to see it before I'd believe it seized. And why would it seize, unless there was no oil in it? If that's the case, it was probably due to improper assembly when they reinstalled the timing chain cover.
