ZR-1 head remal - ZR-1 Net Registry Forums

BAlex1990zR1 · 01-01-2018

I need info on removing head .

A26B · 01-01-2018

You need the GM service Manual for your model ZR-1.
There’s more to reassembling than removing. The LT5 is not like your typical overhead valve engine.
Head R&R can be done in-car, but much more difficult. The engine needs to be removed, especially for cam timing.

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Dynomite · 01-05-2018

I have removed cam covers as well as heads with engine in car. But like Jerry suggests......it would be near impossible to re-install the heads or time the camshafts with engine in car. Also.....after you have the Heads removed with engine in car, what is left you can almost lift out by hand

See LT5 Specific Rebuild Tricks which includes complete photo coverage of an LT5 Rebuild including engine removal and installation.

BAlex1990zR1 · 01-06-2018

Quote:

Originally Posted by Dynomite

I have removed cam covers as well as heads with engine in car. But like Jerry suggests......it would be near impossible to re-install the heads or time the camshafts with engine in car. Also.....after you have the Heads removed with engine in car, what is left you can almost lift out by hand

See LT5 Specific Rebuild Tricks which includes complete photo coverage of an LT5 Rebuild including engine removal and installation.

Would this make the cylinder have no compression?

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Jitse · 01-06-2018

When there is no compression build up at all on a cillinder, it means the area above the piston is not building up any pressure in the compression stroke.
Reasons can be bad pistons rings, valves which are not closing proper and more things.

I suggest to get in contact with one of the specialist shops for the LT5, an LT5 engine is not a job for every mechanic in town. You need to have the skills and some special tools. If you are not a good knowledge about those engine don’t touch it. Or you take the risk and can make more damage.

01-01-2018	#1
BAlex1990zR1 Join Date: Dec 2017 Location: Bradyville Posts: 4	ZR-1 head remal I need info on removing head .

01-01-2018	#2
A26B Join Date: Dec 2003 Location: Arcadia,OK Posts: 3,384	ZR-1 head remal You need the GM service Manual for your model ZR-1. There’s more to reassembling than removing. The LT5 is not like your typical overhead valve engine. Head R&R can be done in-car, but much more difficult. The engine needs to be removed, especially for cam timing. Sent from my iPhone using ZR-1 Net Registry __________________ Jerry Downey JERRYS LT5 GASKETS & PARTS http://www.jerrysgaskets.com 1994 *ZR-1, Black/Black, Lingenfelter Aerobody, 416cu in, 3.91 gears, coil-over susp, Brembo brakes, etc. 2016 Black-Red, 3LT-Z51 Auto 8-speed. Last edited by A26B; 01-01-2018 at 09:36 PM.*

01-05-2018	#3
Dynomite Join Date: Aug 2009 Location: South Dakota/California Posts: 3,791	Re: ZR-1 head remal I have removed cam covers as well as heads with engine in car. But like Jerry suggests......it would be near impossible to re-install the heads or time the camshafts with engine in car. Also.....after you have the Heads removed with engine in car, what is left you can almost lift out by hand See LT5 Specific Rebuild Tricks which includes complete photo coverage of an LT5 Rebuild including engine removal and installation. __________________ Left Clickable links -Solutions- LT5 Modifications/Rebuild Tricks Low Mileage ZR-1 Restoration 1990 Corvette (L98) Modifications LT5 Eliminated Systems LT5 Added Systems LT5/ZR-1 Fluids 1995 LT5 SPECIFIC TOP END REBUILD TRICKS

01-06-2018	#5
Jitse Join Date: Aug 2013 Location: Holland Posts: 80	Re: ZR-1 head remal When there is no compression build up at all on a cillinder, it means the area above the piston is not building up any pressure in the compression stroke. Reasons can be bad pistons rings, valves which are not closing proper and more things. I suggest to get in contact with one of the specialist shops for the LT5, an LT5 engine is not a job for every mechanic in town. You need to have the skills and some special tools. If you are not a good knowledge about those engine don’t touch it. Or you take the risk and can make more damage.