Plenum pulled now for the questions? - ZR-1 Net Registry Forums

White Bullet · 08-26-2010

First let me thank everyone here for your experience and knowledge as they have been very valuable to me maintaining my Z.

My car is need of some attention as the idle is ruff and there is oil leaking from somewhere. I decided that at minimum the plug wires would need replacing as they are the wire sets with LT-5 stamped on them. Got to think at least age wise they are very old for wires. But reading around lends me to believe that more than wires will be needed. So with that I pulled the plenum today with the plan to change the wires and plugs and to test the fuel injectors as they appear to be original (1991) and the motor has 102,000 miles on it. I will probably replace them given they are not ethanol friendly. Now to the questions.

1. When installing the plenum how do you keep the new gaskets from moving while positioning the plenum?

2. The plenum and many parts need cleaning; what would be the recommended method/solvents to get it done?

3. The oil leak is showing up at the back side of the oil pan. I thought it was from loose bolts on the pan. When I checked them some were tight as I could not move them and some where not as tight and I was able to move them but not by very much; maybe an 1/8" turn. Is that enough looseness in the bolts to allow the oil to leak out? The leak would allow about a 3" diameter circle of oil to collect on the floor after driving. Or is it leaking from somewhere else on the back side of the motor?

08-26-2010	#1
White Bullet Join Date: Apr 2008 Location: Gainesville GA Posts: 231	Plenum pulled now for the questions? First let me thank everyone here for your experience and knowledge as they have been very valuable to me maintaining my Z. My car is need of some attention as the idle is ruff and there is oil leaking from somewhere. I decided that at minimum the plug wires would need replacing as they are the wire sets with LT-5 stamped on them. Got to think at least age wise they are very old for wires. But reading around lends me to believe that more than wires will be needed. So with that I pulled the plenum today with the plan to change the wires and plugs and to test the fuel injectors as they appear to be original (1991) and the motor has 102,000 miles on it. I will probably replace them given they are not ethanol friendly. Now to the questions. 1. When installing the plenum how do you keep the new gaskets from moving while positioning the plenum? 2. The plenum and many parts need cleaning; what would be the recommended method/solvents to get it done? 3. The oil leak is showing up at the back side of the oil pan. I thought it was from loose bolts on the pan. When I checked them some were tight as I could not move them and some where not as tight and I was able to move them but not by very much; maybe an 1/8" turn. Is that enough looseness in the bolts to allow the oil to leak out? The leak would allow about a 3" diameter circle of oil to collect on the floor after driving. Or is it leaking from somewhere else on the back side of the motor? __________________ 1991 ZR1, White/Red.