Recent Posts

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LS4 Engine / Ls4 external measurements??
« Last post by bgordon on Jan 21, 2018, 12:29 PM »
Anyone have the external measurements as it is in the car? From the pulley side (passenger) *furthest pulley out* to the driver side?? And then the height??
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LS4 Engine / Re: Head removal
« Last post by LeadfootCJ7 on Jan 16, 2018, 07:32 PM »
I haven't done it myself.  I can't imaging it being too much different than other LS motors.  Anything particular you are wondering about?
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LS4 Engine / Head removal
« Last post by Pmed06 on Jan 11, 2018, 07:09 PM »
Need advice on removing back head to replace lifters. Motor still in car. It’s a 2006 GXP with 82000 mi.
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LS4 Engine / Re: Oil leak top of engine?? Any input appreciated.
« Last post by Monster762 on Dec 23, 2017, 04:33 AM »
It’s not where the sensor screws in. It’s leaking from under the plate that the sensor screws into. I have pics just don’t know how to post them here
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LS4 Engine / Re: Oil leak top of engine?? Any input appreciated.
« Last post by LeadfootCJ7 on Dec 13, 2017, 12:25 PM »
A picture would really help.  Is there a chance that it is leaking from the oil pressure sensor in the valley cover and not the valley cover itself leaking?
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LS4 Engine / Re: Oil leak top of engine?? Any input appreciated.
« Last post by Monster762 on Dec 10, 2017, 02:16 PM »
It’s litterally pouring oil out the front right side and lifters going crazy. No oil pressure alarms but puddling on top the trans and I mean a lot. I put quart in to get level right and it blew it all out that side in minutes. I’m wondering how the pressure sensor isn’t going off. Or maybe that’s set not to go off by the shop that charged me 2 grand for oil pump that took 30 minutes to replace.
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LS4 Engine / Re: Oil leak top of engine?? Any input appreciated.
« Last post by Monster762 on Dec 10, 2017, 02:12 PM »
I’m confused and don’t want to waste money. I have the “intake manifold set” in stock in my parts closet. It claimed it was everything needed to repair did solenoids including valley cover gasket. Part is felpro ms96871. But looking at other manifold gasket sets it does not have 8 rectangular gaskets. It has the valley gasket and all the inner gaskets and 9 o-ring style gaskets. Is that everything or do I need to buy the rectangular set too?  Someone help me out. I know this forum can’t be as dead as it’s looking. Or maybe everyone’s ls4s blew up n they moved on.
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LS4 Engine / Re: Oil leak top of engine?? Any input appreciated.
« Last post by Monster762 on Dec 10, 2017, 12:25 PM »
I think I figured out. It’s the valley cover leaking. Is this a realistic thing to fix myself?  I do not have a few more thousand dollars for a shop to do it in half an hour.
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LS4 Engine / Re: Oil leak top of engine?? Any input appreciated.
« Last post by Monster762 on Dec 10, 2017, 10:16 AM »
Trying to add a pic don’t know how to do it on here.
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Ok recently I have been experiencing an issue where when I turn then lightly hit brakes to turn the other way the steering wheel locks up and won’t let me turn. I let off brakes and wiggle wheel just a little and it frees up. At first this was only right after cold start but yesterday it happened on the road after driving more than 30 mins. Power steering pump is  a delco that I put on a while back. Like year ago or so. Belt new at same time. I also hear squealing like pulley or belt slip but all is tight and can’t narrow it down. The pulley under the steering pump suspect because of markings on it. but I replaced all pulleys at same time with the pump and belt. The one pulley does not seem to be possible to put in far enough. It will lock up on the water housing. I had to shim it out 1/16 it seems slightly off. But after being sent the wrong pulley online and having it torn apart before I realized it was wrong I got it from gm in a rush. I looked at the map and and pointed the exact pulley out to gm. Also had issue where the oil cooler cover didn’t fit either got From gm.had to cut my own gasket with exact k ice to stop that leak Starting to think this engine is modified outside of gm by someone. Hate used cars.
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