C4 Corvette LT1 Project. Engine removal and rebuild

[@jessemartinez395]

underrated engine, and underrated car. Keep showing them love.

[@rsnarski3]

I love the clamshell hood setup on the C4’s!

[@EllweinEngines]

Me too. The hood was not at all in the way. No need to remove it. My buddy calls it an Oyster Shell.

[@taleoftwobirds7155]

Looking forward to the next video on this project

[@JavierIAcuna]

As a Mechanical Engineer myself, I am very impressed by your skills and in depth knowledge of this wonderful engine. I recently purchased a '95 White Corvette; based LT1 Engine with the 6 speed ZF S6-40 Tranny. Tranny does have some issues, mainly with the synchros(1st and 3rd are kind of rough). Thank you for sharing this, and looking forward to more Corvette C4 videos!

[@EllweinEngines]

Thanks Javier, I really like this C4. I've gone so many years without being exposed to them. Just been in the impala SS world for so long. I want to buy a C4 for myself.

[@monopython8487]

Man I wish I was local! Im going to rebuild my 1993 stock 5.7 350 but defitnetly want to go 383. You even mentione lloyd elliot and i actually want to have my stock lt1 heads to be ported and have a emmission passable cam matched by him too. God im so excited but nice build and nice work sir!!!!

[@EllweinEngines]

Thanks very much. Good luck with your project.

[@ianm9853]

Nice video, thank you! Will attempt this in my future once my C4 mileage gets up there :).

[@EllweinEngines]

Keep us posted if you do do that. It is not every day that someone pulls a Corvette engine

[@gregleenyit]

Carl it's called a C beam. I remove flywheel and clutch assembly and the wiper motor when removing the engine from a C4. Maybe a bit overkill, it really makes it easy when working alone. Excellent video I'm looking forward to the rest.

[@EllweinEngines]

Thanks! I was hoping to get input and tips. I should have asked you ahead of pulling the motor. Removing the clutch and flywheel next time. Check.

[@casmithc2]

Great detail. Thanks!

[@EllweinEngines]

Some update info about the crank balance and flywheel. Chris at Clinton machine found the crank was out of balance at the front and rear by not a lot but if I remember right 20 to 30 grams. Also the flywheel was not exactly neutral either. It needed some metal removed about 20 grams too. The pressure plate is going to be checked too. I'll let everyone know.

[@geneyus6411]

How difficult is it to get at the driver's side engine mount? I might have to replace mine and have seen no other videos about that. Thanks.

[@EllweinEngines]

humm. I think (from memory) that from under the car and with the headers removed that it there is enough access to work or swap the motor mount. I don't have a corvette in the shop right now so.....I could be wrong.

[@DanOnFire]

Working C4 Vettes now?! I really need to get on the list.

[@benblack1180]

Your videos have been super helpful. I’m re building my 1992 from the frame out!

[@EllweinEngines]

We need video and photos of your build . :) Oh and thanks.

[@benblack1180]

@@EllweinEngines I’m a novice mechanic at best. Have done a few engine re build and a few trans re builds but this is by far the biggest undertaking so far. Can’t wait to put it on the road tho!

[@benblack1180]

@@EllweinEngines KZbin’s system has now auto removed my comment 2 times because it had a link in it. I was trying to post an imgur album of the project but KZbin has denied me.

[@benblack1180]

@@EllweinEngines Tried again, but it auto removed. I’m happy to email some pictures! Or when I get home I’ll record a short video to post on KZbin.

[@EllweinEngines]

@@benblack1180 Thanks for trying. When you do uplink to KZbin I'll link to it in the Corvette project play list. Thanks.

[@matthewbrown3317]

Great video I'll be looking forward to watching it 😀👍

[@itsyaboirecords]

What kind of dash kit is that?

[@EllweinEngines]

I don't know actually. you mean the carbon fiber trim?

[@georgemerusi299]

Love to kn ow how I would get on your list for a build/rebuild like this on my LT1 Corvette?

[@EllweinEngines]

Drop me an email at [e-mail] and you'll be #1 on the list after I finish this.

[@bohemianraceart]

Steel Blue 💗💗💗

[@nickwalters9311]

Does that manifold coil pack illuminate the optispark ?

[@EllweinEngines]

yes. The opti is removed and the TorqHead cam/crank signal unit takes it's place.

[@nickwalters9311]

@@EllweinEngines oh that's amazing, I've only ever seen the one where it is replaced by a pulley system but I like that one that you have better

[@enufced70]

Do you know where the owner got the carbon fiber pieces for the dashboard?

[@EllweinEngines]

I'm pretty sure it was Corvette Central

[@NotAGarage]

Do you have a opinion on the windage tray? I'm literally outside building my LT1. I'm asking because my short block came without the 3 stud main cap bolts to install the stock windage tray. I am using the stock oil pan. This has stopped my progress today. Should I use the main cap studs off the previous LT1 engine I removed from my car? And loosen them all and re-torque down to spec with the LT1 main cap studs installed where I need them? I know I can run it without the tray, I know windage can rob horsepower, but that is what concerned me - it's that it can cause air in the crankcase. I have alot of money in these parts and this build. I need a well experienced LT1 builder, like yours, and your opinion please. My other question is: how can I get a socket over the deep studs from the main caps to torque down? I have them removed off the old engine, but I had to remove them with a wrench.

[@EllweinEngines]

Definitely you do need the windage tray. Just like you mention if you do not have the stock tray then you'll have air/oil mix. Yes you can take the stock bolts and change them out one by one. 77 ft-lb I do believe. You can get a "crows-foot" for the long windage bolts. It's worth the time and effort.

[@Z06-viper]

Check to see if the flywheel is balanced properly. That can create a wobble-shake 3k and above.

[@EllweinEngines]

Gotcha. Flywheel is at the machine shop too and Chris at Clinton Machine is on top of it. Chris mentioned pressure plate too.

[@CaseTheCorvetteMan]

So what was the cause of the vibration around 3,000 and up?

[@EllweinEngines]

So far I cannot rule out that it was the clutch or something in the driveline. We know for certain that the engine is smooth. So when I put the engine back in and everything and get a road test if it is rumbling again at 3000 and up then I know it’s driveline. Check back for future updates because I have not put the motor back and I don’t really have time until about two weeks from now

[@CaseTheCorvetteMan]

@@EllweinEngines cheers for the response mate :) I have a 93 Callaway Supernatural that has a very slight vibration at about 3,000rpm, happens whether sitting still with clutch in or driving around. I swapped out the harmonic balancer the other day and it is a touch smoother, but i can still feel it slightly there.

[@EllweinEngines]

@@CaseTheCorvetteMan we will get to the bottom of it. Has your Supernatural always been that way? I shouldn't be the engine because they made a really high quality hot rod back in the day.

[@CaseTheCorvetteMan]

@@EllweinEngines yeah since i've had it it has, although it was masked a bit by a lot of other very little problems that i've been working through. Overall it is in great shape, mostly just a lot of age related maintenance that was overdue when i got it.

[@joshstaley7459]

great video

[@EllweinEngines]

Thanks!

[@tedbraytonjr8342]

Have you ever used the torqhead before I am thinking about putting that on my 97 Z28 LT1

[@EllweinEngines]

Yes. I love the TorqHead. I have it on my car and have installed it on numerous cars. I like it.

[@ernestmullins4109]

Great video LT1 lover

[@EllweinEngines]

Thanks

[@henrynwatu8132]

Ever find the issue?

[@EllweinEngines]

Yes. the rumble was exactly what I had guessed. the engine rotating assembly was not balanced very well. The rebalance was performed and then all smooth. the car drives very well now. the owner is enjoying the car, (has been for a few years now). Thanks for asking and watching.

[@wreckanchor]

Let us know what you find the "rumble" to be.

[@EllweinEngines]

will do. Right now I think it will end up being clutch or driveshaft and not the rotating assembly. But we will find out.

[@reddyfreddy]

A mile of room, like a 1/2 inch.. lol karl!