The Stupid Engine Questions Thread

[slippy3002]

this has probably been asked a dozen times im having a issue with low oil pressure on my 94 it has a 350 tbi when its cold it read 40 to just under 40 psi then when warm it goes to near red but i have zero knocking would this be the sender for the guage i wouldnt think this was a pump issue i would also figure it would knock if there wasnt good oil pressure

I new someone with a Tahoe that this happened to with no noise. He started it to warm it in the morning and it blew the oil filter clear off with a bang. The oil pump was clogged.

Sent from Robl@nd

 

[94 cheyenne]

ill have the pan off soon ill find out if its clogged or not

 

[EDGECRUSHER]

Last time I rebuilt an engine was in the 90's; is it still cheaper to rebuild or have the crate engines made that obsolete? I just want a replacement for my stock 5.7TBI. Also what would be the correct part# for a crate for a '92 K1500 W/T? When the start talking about rear seals I get a little confused as to what I got.

I think it's fun to rebuild but at the moment I'm all about my budget.

 

[slippy3002]

Last time I rebuilt an engine was in the 90's; is it still cheaper to rebuild or have the crate engines made that obsolete? I just want a replacement for my stock 5.7TBI. Also what would be the correct part# for a crate for a '92 K1500 W/T? When the start talking about rear seals I get a little confused as to what I got.

I think it's fun to rebuild but at the moment I'm all about my budget.

It is still cheaper to rebuild. A replacement motor can be bought from Jegs for around 2k.

Sent from Robl@nd

 

[Hood93z]

Hey fellows, new to the site and liking it so far...stupid question time (one of many to come I'm sure)...

1997 gmc Sierra 1500 4x4 Z71...5.7 ltr locked up on wife while in Iraq, sat a year, sent to local shop for rebuild. Terrible experience but here's my problem....

I arrived to pick up truck and it was still on lift while the guys there finished up. I walked under, noticed cut crimped oil hard lines leaking oil. Looked up followed lines to small oil/trans cooler and also saw no oil filter relocation/adapter kit, just a filter screwed in block. he mumbled about it wasn't nothing and that the lines were bad anyway. Also noticed the flywheel cover was missing and I had a brand new torque converter. I left to go talk to manager (18 yr old girl) about the lines and all that. She said with the time we had agreed on she didn't have time to order one and would get it and I'd return. I really needed my truck so I went along with it. I got the bill and noticed the charge for torque con. And flywheel. I asked why it was changed. She said it was "locked" up. I paid and agreed to come back for repairs. Which brings me to questions I can't seem to nail down simply...

1. Can a torque con./flywheel go from driving fine with no drivetrain issues to report, sit for 8 months in Ft Bragg, then GO BAD?
2. Does the lines that were cut and crimped play significant role in moving oil? I've had a steady flow from the two lines ever since and lose quarts a week.
3. Did they use a non 4x4, older TBI, or anything other than the stock block to rebuild it? Thus causing need for torque converter, flywheel and then no adapter kit for the oil cooler/filter relocation deal?
4. If so, would that explain missing flywheel cover, and now, a sudden serious leak from water pump and the starter to always miss/grind?

I know that's a lot...and I replied to a post...and I'm a noobaroni, but any help is GREATLY appreciated....

In a nut shell, does placing any other nearly completely but not exactly compatible block with my vortec heads on my Z71 cause any of the above mentioned bullish and why?

Thanks a ton and I look forward to contributing.....

This is why I try to do most of my own work or carry it to a trusted mechanic I've never heard of a torque converter going bad like that so yes it's very possible they just stuck a older engine in there instead of rebuilding the old one the vortec heads will bolt to older style blocks the oil lines you mentioned are just oil cooler lines not a real big necessity but yes it's nice to have but not real necessary

 

[Kuma]

my oil pump is going out. is it possible to change the oil pump without pulling the motor in these trucks? 95 1500 with a 350 2wd.

 

[Hood93z]

Yes you can but you have to take a motor mount loose and jack the engine up

 

[DRAGGIN95]

my oil pump is going out. is it possible to change the oil pump without pulling the motor in these trucks? 95 1500 with a 350 2wd.

Hello, on a 2wd GMT 400 with a v-8 you can pull the oil pan by only pulling the torque convertor cover and the exhaust crossover pipe, the engine does not have to unbolted from its mounts at all. I have pulled the pan off of several of these truck's, 1500-3500 it doesn't matter.

 

[Kuma]

Cool, thanks. even if I do have to finagle it a bit, that's better than pulling the motor.

 

[Hood93z]

Ok I've only managed do oil pan gaskets like that on the 4wd models and it seems slightly easier to lift the motor a bit