Recently I had to remove the air cleaner plenum for the first time. Unfortunately, when I tried to spin the plastic thumbscrews holding the plenum, they simply spun and did not release the plenum. Having never removed the plenum before I didn’t know how it was attached to the radiator shroud below it. I consulted […] More »

During a Q & A session at Corvettes at Carlisle 2001 Gordon Killebrew mentioned one cause of fuel pump problems. Under the plate that secures the fuel pump assembly to the top of the gas tank is a small black connector. With time the pins and socket of this connector can become oxidized to such […] More »

Let me save you some money. The $400 stock OEM C4 pump is nothing more than a generic GM V8 LT1 Caprice station wagon pump with a different pressure control valve installed to provide higher effort steering. The C4-specific valve is available separately from GM for about $18 and it drops into the high pressure […] More »

Forum members ought to know that there is an alternative to converting an R-12 A/C system to R-134a. R-406A is a federally approved direct replacement for R-12. The procedures for use are the same as with any refrigerant. You typically would not add refrigerant to any system but would rather reclaim what is in the […] More »

I have a 1992 LT1 that had a very random start problem. Fuel Pressure was Ok, Spark to plugs was fine, no error codes were set in ECM. Once the car started it ran fine. Finally took a #47 (12Volt) bulb and put it across the fuel injector wires. Found that when the car was […] More »

In front of the water pump pulley on 1988 and later L98s resides a rather large 10lb steel disk, lovingly refered to as the “frisbee”. There has been much debate on the Forum about it’s purpose and the benefits/risks of removing it. During a Q & A session at Corvettes at Carlisle 2001, I posed […] More »

I recently performed this small feat by not following the Haynes Manual instructions. For the driver\’s side valve cover removal the manual descibed removing the serpentine belt and the alternator in order that the valve cover could be moved forward for removal. I noticed the cover for the wiper motor at the firewall and with […] More »