C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Engine Cradle

Thread Tools
 
Search this Thread
 
Old Oct 29, 2019 | 10:19 AM
  #1  
TCDane's Avatar
TCDane
Thread Starter
4th Gear
 
Joined: Apr 2016
Posts: 4
Likes: 0
From: Neosho MO
Default Engine Cradle

Has anyone replaced one of these before?


Does anybody know if the GM shop manual has the procedure in it? I know I need to buy one anyway but just haven't done it yet.

Any hints, tips, tricks, links, videos, wishes for good luck appreciated. LOL!
Reply
Old Oct 29, 2019 | 05:18 PM
  #2  
VikingTrad3r's Avatar
VikingTrad3r
Oil Producer
Supporting Gold
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Apr 2014
Posts: 9,349
Likes: 2,726
Default

Originally Posted by TCDane
Has anyone replaced one of these before?


Does anybody know if the GM shop manual has the procedure in it? I know I need to buy one anyway but just haven't done it yet.

Any hints, tips, tricks, links, videos, wishes for good luck appreciated. LOL!
did your wife run over a rock like my wife did?

im just about to start mine on my 87. What year is yours?

its not hard, but you do need a way to suspend the engine. or, prop it up from below, and you cant prop all of it up on the oil pan or it will deform the pan.

in my case i built a little gantry using two cubes of 6x6 on the hood latch pedestals (hoop open obviously) and a 4x4 beam across like a bridge over the windshield drip tray. i then replaced the most rearward exhaust manifold bolts with longer bolts and used 4 (2 per side) ratchet straps to suspend the engine strapped from the rear ex manifold bolts up to the gantry. i also included a support under the trans tailshaft housing.

There are surprisingly few bolts holding the cradle on. The hardest one for me to reach was the forward hex bolt on Passenger side engine mount. I was able to get to it using a series of extensions up from the bottom
Reply
Old Oct 30, 2019 | 09:15 AM
  #3  
TCDane's Avatar
TCDane
Thread Starter
4th Gear
 
Joined: Apr 2016
Posts: 4
Likes: 0
From: Neosho MO
Default

Originally Posted by VikingTrad3r
did your wife run over a rock like my wife did?

im just about to start mine on my 87. What year is yours?

its not hard, but you do need a way to suspend the engine. or, prop it up from below, and you cant prop all of it up on the oil pan or it will deform the pan.

in my case i built a little gantry using two cubes of 6x6 on the hood latch pedestals (hoop open obviously) and a 4x4 beam across like a bridge over the windshield drip tray. i then replaced the most rearward exhaust manifold bolts with longer bolts and used 4 (2 per side) ratchet straps to suspend the engine strapped from the rear ex manifold bolts up to the gantry. i also included a support under the trans tailshaft housing.

There are surprisingly few bolts holding the cradle on. The hardest one for me to reach was the forward hex bolt on Passenger side engine mount. I was able to get to it using a series of extensions up from the bottom
Mine was actually my doing. I pulled off the road to get some paperwork together that had come lose and was blowing around the inside. Didn't see a culvert that was overgrown with grass. Stopped about 20 feet sooner than I intended.

Mine is an 85.

I was thinking of propping up at the sides of the pan and then using ratchet straps under the engine but I wasn't sure how yet. Thanks for the idea. I also thought of buying an engine hoist but I figured the legs from the hoist would be a pain to work around.

It's going to be a learning experience for me. I've never messed with suspension before. But before owning this car I had never replaced a heater core or head gaskets either. So there's that.

Thanks again. Every hint is appreciated.
Reply
Old Oct 30, 2019 | 11:02 AM
  #4  
Kevova's Avatar
Kevova
Le Mans Master
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Sep 2013
Posts: 6,192
Likes: 750
From: near the thumb in the mitten
Default

Using 5 ton jack stands to get car high as possible will help. Remove suspension pieces before removing crossmember. I would leave rack on crossmember and transfer it to new one off car. Bag upper control are spacer shims. nut and bolt in 4 separate zip loc bags and label location. Car will need alignment checked afterwards. If shims and bolts are in original location alignment should be close, less likely to wear tires until alignment is verified. While apart address worn bushings if necessary. Photos can be helpful during reassembly. I would fab away to support engine from above. Having a "stick" in the way can be a PITA if it gets in the way.
Reply
Old Oct 30, 2019 | 11:34 AM
  #5  
TCDane's Avatar
TCDane
Thread Starter
4th Gear
 
Joined: Apr 2016
Posts: 4
Likes: 0
From: Neosho MO
Default

Awesome thanks. Spacers are in original location on driver side. Passenger side I shifted around to try and correct the damage as much as possible. 15sec afterwards I realized I probably should have made note of the original locations. Ooops.

As a newbie to this I find the cell phone is my best friend when doing work. A quick pic of everything I do makes working in reverse much easier. Keeps me from getting everything back together and finding that one forgotten bolt also. LOL!

I have a feeling for the next couple of months my time and expense is going to be spent on the, "While I'm at it" projects. Oil pan needs changed, might as well change break pads while they are off, check bushings like you mentioned, etc. etc. etc. Part of the fun of owning them though right? :-)
Reply
Old Oct 30, 2019 | 12:07 PM
  #6  
Kevova's Avatar
Kevova
Le Mans Master
10 Year Member
Liked
Loved
Community Favorite
 
Joined: Sep 2013
Posts: 6,192
Likes: 750
From: near the thumb in the mitten
Default

Since you are already in process. Lower control arms have spring pressure on them. Be prepared when shocks are unbolted. Floor jack to lower arm after shocks is taken loose recommended.
Reply
Old Oct 30, 2019 | 03:35 PM
  #7  
TCDane's Avatar
TCDane
Thread Starter
4th Gear
 
Joined: Apr 2016
Posts: 4
Likes: 0
From: Neosho MO
Default

Originally Posted by Kevova
Since you are already in process. Lower control arms have spring pressure on them. Be prepared when shocks are unbolted. Floor jack to lower arm after shocks is taken loose recommended.
I might have figured that out before I got there. But I might not have either. Thank you!!!

I'm not that far in yet. Next job is to remove the break calipers. That one is easy. I'm waiting for the GM shop manual to come in before I attack to much else. LOL!

Thanks again for the tip.
Reply

Get notified of new replies

To Engine Cradle





All times are GMT -4. The time now is 04:16 AM.

story-0
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

Slideshow: Should you buy a 2020-2026 Corvette or wait for 2027?

By Michael S. Palmer | 2026-04-22 10:08:58


VIEW MORE
story-1
2027 Corvette vs The World: Every Model vs Closest Competitor

Slideshow: 2027 Corvette lineup vs the world.

By Joe Kucinski | 2026-04-20 17:58:41


VIEW MORE
story-2
10 Most Common Corvette Problems of the Last 20 Years!

Slideshow: 10 major Corvette problems from the last 20 years.

By Joe Kucinski | 2026-04-14 16:37:05


VIEW MORE
story-3
5 MOST and 5 LEAST Popular Corvette Model Years in History!

Slideshow: 5 most and least popular Corvette model years.

By Joe Kucinski | 2026-04-08 13:25:01


VIEW MORE
story-4
2027 Corvette Buyer's Guide: Everything You Need to Know!

Slideshow: 2027 Corvette buyer's guide

By Joe Kucinski | 2026-04-17 16:41:08


VIEW MORE
story-5
10 Things C8 Corvette Owners Hate (But Won't Tell You)

Slideshow: 10 things C8 Corvette owners hate, but won't tell you.

By Joe Kucinski | 2026-04-01 18:36:07


VIEW MORE
story-6
10 Best Corvettes Coming to Barrett-Jackson Palm Beach 2026!

Slideshow: Should you add one of these incredible Corvettes to your garage?

By Brett Foote | 2026-04-01 18:14:05


VIEW MORE
story-7
Every Corvette Grand Sport Explained! (C2, C4, C6, C7, & C8)

Slideshow: Every Corvette Grand Sport explained

By Joe Kucinski | 2026-03-26 07:13:44


VIEW MORE
story-8
Grand Sport & Grand Sport X Launch Alongside All-New 535hp LS6 V8!

Slideshow: Breaking down the 2027 Grand Sport, Grand Sport X, Stingray, and LS6 V8.

By Michael S. Palmer | 2026-03-26 13:48:45


VIEW MORE
story-9
5 Reasons Bad Drivers Crash & 5 Ways to Avoid a Costly Mistake!

Slideshow: 5 reasons bad drivers crash sports cars & 5 ways to avoid a costly shame!

By Joe Kucinski | 2026-03-25 16:32:55


VIEW MORE