ZR1 sitting for 20 years - ZR-1 Net Registry Forums

Car-nutt · 11-10-2023

Hello everyone, I am looking to purchase a 1991 ZR1 it has roughly 50,000 miles. It hasn?t been driven or started in 20 years, just wanted to know what you think the car might need in order to start driving it again. I know the car was not properly stored, but it was stored in a climate controlled garage.

LGAFF · 11-10-2023

-Oil change
-oil/fuel Filter Change
-Fuel pumps
-Injectors
-Check the o rings at the fuel connections and rails, they can dry up and leak and cause a fire.
-Check MAP sensor connection/hoses
-Test for vac leaks/secondary intake system vac pump function

after startup... can think about trans fluid and Diff

Car-nutt · 11-10-2023

Thank you for the reply

LGAFF · 11-10-2023

http://zr1specialist.com/HAT%20Web/p...0Awakening.pdf

phrogs · 11-11-2023

If you crank it now the timing chain is going to slap like a mofo until oil pressure is built up so tread lightly there.

read the above^^

Car-nutt · 11-12-2023

Thank you, for your input. I am going to see the car today (Sunday Nov 12 ). I will post some pic?s.

geezer · 11-12-2023

Where in Ontario ??

Car-nutt · 11-12-2023

Orangeville Ontario

Z51JEFF · 11-21-2023

One other thing to do is once everything is replaced and it's time to start it use the FUEL FLOODED procedure before you do start it,I always do this once my cars been sitting for awhile. Turn the key on,no crank,put pedal to the floor now crank the engine over a few seconds to build oil pressure. The car won't start with the pedal to the floor. This is the procedure for clearing a flooded engine.

Hib Halverson · 11-21-2023

1) Replace the battery. Clean cable ends if necessary
2) Inspect the fuel tank. Clean/replace as necessary
3) Replace fuel pumps
4) Replace fuel filter
5) Replace injectors
6) Pull the fuel rails, flush them and replace the o-rings
7) Inspect engine wiring and connections. Repair as necessary
8) Inspect coolant hoses. Repair as necessary.
9) Change the coolant.
10) Replace the coolant fill cap
11) Replace the oil hoses
12) Change oil and filter
13) Inspect power steering hoses. Replace as necessary
13) Change power steering fluid.
14) Pull the ign fuses.
15) Crank the engine until oil pressure is up.
16) Replace the ign fuse, start engine and run until oil temp. is nominal
17) Diagnose any fault codes and repair as necessary
18) Remove the wheels
19) Replace brake hoses
20) Bleed the brakes
21) Replace the tires and reinstall the wheels.
22) Lube ball joints
23) Change the trans and axle lubes
24) Road test

11-10-2023	#1
Car-nutt Join Date: Oct 2023 Location: Ontario Canada Posts: 19	ZR1 sitting for 20 years Hello everyone, I am looking to purchase a 1991 ZR1 it has roughly 50,000 miles. It hasn?t been driven or started in 20 years, just wanted to know what you think the car might need in order to start driving it again. I know the car was not properly stored, but it was stored in a climate controlled garage.

11-10-2023	#2
LGAFF Join Date: Mar 2007 Location: Crystal Lake, IL Posts: 7,180	Re: ZR1 sitting for 20 years -Oil change -oil/fuel Filter Change -Fuel pumps -Injectors -Check the o rings at the fuel connections and rails, they can dry up and leak and cause a fire. -Check MAP sensor connection/hoses -Test for vac leaks/secondary intake system vac pump function after startup... can think about trans fluid and Diff __________________ LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359

11-10-2023	#3
Car-nutt Join Date: Oct 2023 Location: Ontario Canada Posts: 19	Re: ZR1 sitting for 20 years Thank you for the reply

11-10-2023	#4
LGAFF Join Date: Mar 2007 Location: Crystal Lake, IL Posts: 7,180	Re: ZR1 sitting for 20 years http://zr1specialist.com/HAT%20Web/p...0Awakening.pdf __________________ LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359

11-11-2023	#5
phrogs Join Date: Jul 2004 Location: Kalamazoo MI Posts: 1,758	Re: ZR1 sitting for 20 years If you crank it now the timing chain is going to slap like a mofo until oil pressure is built up so tread lightly there. read the above^^ __________________ JOHNNY P Currently own 90 ZR-1 #845 DRM 500 engine package 90 #226 Parts car Hit me up if you need anything.

11-12-2023	#6
Car-nutt Join Date: Oct 2023 Location: Ontario Canada Posts: 19	Re: ZR1 sitting for 20 years Thank you, for your input. I am going to see the car today (Sunday Nov 12 ). I will post some pic?s.

11-12-2023	#7
geezer Join Date: Aug 2010 Location: ottawa canada Posts: 154	Re: ZR1 sitting for 20 years Where in Ontario ??

11-12-2023	#8
Car-nutt Join Date: Oct 2023 Location: Ontario Canada Posts: 19	Re: ZR1 sitting for 20 years Orangeville Ontario

11-21-2023	#9
Z51JEFF Join Date: Dec 2007 Location: Fremont, CA Posts: 3,087	Re: ZR1 sitting for 20 years One other thing to do is once everything is replaced and it's time to start it use the FUEL FLOODED procedure before you do start it,I always do this once my cars been sitting for awhile. Turn the key on,no crank,put pedal to the floor now crank the engine over a few seconds to build oil pressure. The car won't start with the pedal to the floor. This is the procedure for clearing a flooded engine.

11-21-2023	#10
Hib Halverson Join Date: Jun 2005 Location: CenCoast California Posts: 898	Re: ZR1 sitting for 20 years 1) Replace the battery. Clean cable ends if necessary 2) Inspect the fuel tank. Clean/replace as necessary 3) Replace fuel pumps 4) Replace fuel filter 5) Replace injectors 6) Pull the fuel rails, flush them and replace the o-rings 7) Inspect engine wiring and connections. Repair as necessary 8) Inspect coolant hoses. Repair as necessary. 9) Change the coolant. 10) Replace the coolant fill cap 11) Replace the oil hoses 12) Change oil and filter 13) Inspect power steering hoses. Replace as necessary 13) Change power steering fluid. 14) Pull the ign fuses. 15) Crank the engine until oil pressure is up. 16) Replace the ign fuse, start engine and run until oil temp. is nominal 17) Diagnose any fault codes and repair as necessary 18) Remove the wheels 19) Replace brake hoses 20) Bleed the brakes 21) Replace the tires and reinstall the wheels. 22) Lube ball joints 23) Change the trans and axle lubes 24) Road test __________________ Hib Halverson Technical Writer former owner 95 VIN 0140 current owner 19 VIN 1878