basic questions
 

1991 ZR1 w 75k miles.
I have the start of a very small oil drip.
I was using mobil 1 (10quarts). Should I change
I like the bosch filter
what are the torque specs for the oil drain plug
what are the torque specs for lug nuts
what is recommended for coolant (I think I remember 50% distilled and something else, I'm about the pull the rad and clean it and just want to make sure im putting the right coolant in it for Florida weather)

thanks in advance, you guys on this forum have been great. Without you Id be much poorer and have a poorly running car.

Re: basic questions
 

Fix it :D


Yes, you should change your oil. Amsoil is now the oil of choice for the ZR-1. Bosch filter is fine.


38ftlbs


100 ftlbs


Any coolant meeting the 1825M spec for GM. Do not use any of the "fits all coolant" brands. Napa carries the green stuff that is correct. It comes in a blue container.

Re: basic questions
 

thanks Jeff,
Should I mix it 50/50 with the distilled???

How many quarts of oil??

How much coolant or coolant H2O mix??

Re: basic questions
 

I run more water than coolant. Coolant does not have the same cooling capacity as water.

On an oil change you should add 8-9 qts.

Re: basic questions
 

Jeff's right, water does a much better job of dissipating heat than coolant. In summer time i tell my customers to go 70/30-80/20 water/coolant ratio. But not at the race track...water only!

Re: basic questions
 

Coolant is a bitch to clean off the track. Not many happy people when you blow a hose or stuff it into the wall.

Re: basic questions
 

Hi guys....
Another of my thousand questions:
Which is the best complete manual for Zr-1?And where i can buy it?
I'll like to buy a technical manual where i can find all the spec for lt5, with the right torque for all nuts and screw (the most important)??
Thank you so much:handshak:

Re: basic questions
 

You want to get in touch with Helms,they made the FSM for G.M.Dont be surprised when it arrives,this thing is about 5 inches thick.

Re: basic questions
 

There's a web site where i can see it and know how much is it??
Thanks

Re: basic questions
 

Go to http://www.helminc.com/helm/homepage...ls&FORM=MSNH11

The set (5 sets of documents and supplements) runs $105 plus about $16 S&H.

Coolant.... Texaco 'green stuff' also meets the 1825M spec Jeff noted