Another stepside build/restoration

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What head castings are on that LM7?

[TimberwolfFXDL]

What head castings are on that LM7?

I probably wont know for a while. It's a 2003 with 90k miles from a silverado. I pick it up tomorrow. Not sure when I will pop the valve covers

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You should be able to see it from the outside, on the corner of either head.  It's only really important if they are 706's.  If so, check out the link below, and look closely, you may be replacing the heads on it.  I have two LM7's (an '03 and an '05), fully dressed, I got off CL for $150.  Both were junked because of the castech's. 

http://ww2.justanswer.com/uploads/Bluegorilla/2008-12-05_142924_Coolant_loss_5.3.pdf

Mine are not cracked, however, to be safe, I am finding some different LM7 heads.

[bake74]

     Nice find on the engine, hopefully you got it cheap which would make it even sweeter.

[TimberwolfFXDL]

Started getting the passenger side floor put together last night:



Also, note the flash rust from the water infiltration?  Kinda thinking it might be the hood hinge seal

[TimberwolfFXDL]

You should be able to see it from the outside, on the corner of either head.  It's only really important if they are 706's.  If so, check out the link below, and look closely, you may be replacing the heads on it.  I have two LM7's (an '03 and an '05), fully dressed, I got off CL for $150.  Both were junked because of the castech's. 

http://ww2.justanswer.com/uploads/Bluegorilla/2008-12-05_142924_Coolant_loss_5.3.pdf

Mine are not cracked, however, to be safe, I am finding some different LM7 heads.

thanks for the tip.  I am working on finding out the info today before I make the 90 mile trip (each way) to pick it up tonight.

Are there other casting numbers?  I'm trying to find more info through google, and while I see an 852 head, I also wee where those were only on the 4.8.  Is that correct?  If not, can someone point me to the correct info regarding the casting numbers to look for or avoid on 2001-2006 lm7 engines?

[reload]

You should be able to see it from the outside, on the corner of either head.  It's only really important if they are 706's.  If so, check out the link below, and look closely, you may be replacing the heads on it.  I have two LM7's (an '03 and an '05), fully dressed, I got off CL for $150.  Both were junked because of the castech's. 

http://ww2.justanswer.com/uploads/Bluegorilla/2008-12-05_142924_Coolant_loss_5.3.pdf

Mine are not cracked, however, to be safe, I am finding some different LM7 heads.

thanks for the tip.  I am working on finding out the info today before I make the 90 mile trip (each way) to pick it up tonight.

Are there other casting numbers?  I'm trying to find more info through google, and while I see an 852 head, I also wee where those were only on the 4.8.  Is that correct?  If not, can someone point me to the correct info regarding the casting numbers to look for or avoid on 2001-2006 lm7 engines?

Here is some good info - http://ls1tech.com/forums/generation-iii-internal-engine/102712-common-question-head-casting-numbers-details.html

The only difference from the 4.8 and 5.3 is the stroke.  Same bore, 83mm stroke for the 4.8 and 92mm for the 5.3, both share 96mm bore.  Maybe slight cam differences, same intake, manifolds, etc...

I will post more info when I get some more time, running like crazy getting ready for a weekend of riding. 

[TimberwolfFXDL]

I was checking out that thread yesterday, that's where I got the 852 info.  But according to this site, there's an 862 as well?
http://www.chevythunder.com/LS1%20components.htm#Gen%20III%20Cylinder%20Head%20ID%20Numbers

[TimberwolfFXDL]

Progress...

[bake74]

     I like the way the seats look so far, are they going to be adjustable, or fixed ?

[TimberwolfFXDL]

I ended up making them fixed.  I'm only 5'7" and I drive with the seat all the way back.  I figure, if anyone taller than me drives the truck, it's sure not going back any further, and there's not many people shorter than me that would drive it, so it made sense to leave them fixed.

Besides, the seats are pretty thick... setting them on adjuster rails would have put the steering wheel pretty close to my legs

[TimberwolfFXDL]

deal fell through on the LM7.  I was trading the guy a 44 Magnum, and he didn't want to take the time to go get a purchase permit, so I told him thanks anyway.

Search is back on for a heart transplant donor.

In the meantime, I have got to track down this water leak.  The insulation around the heater box inside the truck is wet, and there are random drip lines coming from it.  Guess it's time to get out a hose or something and see what I can find.  After a day of rain, there's a good half pint of standing water on the passenger side floor pan.

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LQ4

[TimberwolfFXDL]

Remember this big gaper?

Here it is now.  Haven't cleaned the flux off yet, my apologies.  You can also see I patched the driver's side kick panel and the hole above the body mount right below the brake pedal.  While I was at it, I welded up all the holes that the previous owner left behind.


Don't think I posted a picture of the finished seat mount pockets.  You can also see the two welds above and to the left and right.  Those are the old seat track holes.  I screwed a bolt in part way, tack welded it, then cut it off with the angle grinder.  Then I finished filling the holes.  I still need to grind them flush, but it was a long day already.


Finally almost done with the interior patching.  I have a couple small sections of weather strip ridge to replace, fix my leak, then it's time for lizard skin on the floor, and paint everywhere else

[bake74]

     looking good.