LT5 Refresh

[Subfixer]

My second bargain basement purchase came today.
This is a complete rebuilt LT5 from 90 # 2793.
It has already been converted to secondary delete.
It does need final assembly of some parts, but it's all there.
Came with wiring harness, ECU reprogrammed by Marc, Black label ZF6, Bell housing, Thermostat housing, water pipes, etc..... Only missing the AC compressor.
All that for 1/2 the price of a crate LT5.

Can anyone identify the headers on this engine? They are not originals that I can tell.

After taking a hard look at the first LT5 #0116, looks like it is going to be completely disassembled and redone. I'll tackle that after I finish the assembly of #2793.

[tiegsd]

Damn! Looks like a lot of fun.

[tccrab]

Theres no air injection on the headers so they arent stock, although they do look like stock 1993-1995 manifolds with bolt on cats.

Need more detailed pics to be sure.



Crabs

[Subfixer]

Here's a couple of better header pics. No provision for O2 sensors.

[Subfixer]

Ok guys, what's the trick to get the Cam Cover bolts out?
Nothing moving with a 30" breaker bar. I don't want to strip out the bolt heads.
No movement with one of those impact drivers (the one you hit with a hammer).
Engine is on a stand.

[1991 Corvette ZR-1]

If you use an impact gun, you can center yourself directly over the bolt and focus on creating downward force while the impact gun hammers the bolts loose. Marc was not opposed to this method when I discussed it with him. I have a few. One has 300 ft lbs breakaway torque and the other is 1200.

[JG95ZR1]

The trick is a good brand torx bit (buy a few just in case) that fits snug and that won?t twist or crack. Then a good impact gun no extension using the same technique 1991 Corvette ZR-1 mentioned above.

I have broken a few my first time at it when I did it by hand and it sucks!

Good luck


Sent from my iPhone using ZR-1 Net Registry

[1991 Corvette ZR-1]

Originally Posted by JG95ZR1

The trick is a good brand torx bit (buy a few just in case) that fits snug and that won?t twist or crack. Then a good impact gun no extension using the same technique 1991 Corvette ZR-1 mentioned above.

I have broken a few my first time at it when I did it by hand and it sucks!

Good luck


Sent from my iPhone using ZR-1 Net Registry

My cam covers have small leaks and it drives me crazy. But I know a broken or stripped torx bolt would be ten times worse on my mental health. I dread having to remove them, especially from the passenger side but maybe it will be a next year project. I can only look at fine silver finish Marc can refinish the top end in so many times before I commit to a bad idea of trying to remove them.

[Mystic ZR-1]

Originally Posted by Subfixer

Ok guys, what's the trick to get the Cam Cover bolts out?
Nothing moving with a 30" breaker bar. I don't want to strip out the bolt heads.
No movement with one of those impact drivers (the one you hit with a hammer).
Engine is on a stand.

That's method I used all cam out with no problems. The key is clean out the hole in the bolt and use a good torx bit with sharp points

[A26B]

Originally Posted by Mystic ZR-1

That's method I used all cam out with no problems. The key is clean out the hole in the bolt and use a good torx bit with sharp points

Yes, I agree. The hammer impact is the perfect tool for jobs like this. The shock helps to loosen the bolt, the angle of the tool is easy to maintain and the hammer impact drives the too to the bottom of the torx hole at the same time the torque is applied. One of my favorite tools for several decades now. Actually gave each of my sons one for Christmas this year.