Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.
High HCs usually mean it's running rich or misfiring. As @SUBURBAN5 said, cat can be the issue too. I'd try a tuneup 1st. Pull the plugs and look at them for fouling or other issues.331 PPM HC (220 allowed)
High HCs usually mean it's running rich or misfiring. As @SUBURBAN5 said, cat can be the issue too. I'd try a tuneup 1st. Pull the plugs and look at them for fouling or other issues.
95 K2500 burb, 7.4/4L80E, big radiator. Driver's side hard lines are AT cooler, passenger's side are engine oil, right? Any known-good or known-bad brands? I went through a hell of a time with my JK Wrangler and awful 3rd party radiators before giving up and buying autozone.
The upper driver's side fitting, just below the upper hose, is goobered up with cracked JB Weld and is seeping coolant but I don't think I'll be able to disconnect the fitting without breaking something. Thanks, previous owner.
Picking up a 98 K1500 (350) today. It has this nasty coolant that looks like it was Dexcool in another life and I want to swap it for the regular green.
They sell these back flush kits where you connect a water hose to a tee at the heater hose inlet, run the engine and watch it empty through the radiator cap opening all over the place.
Questions:
1. Is this sufficient to clear all the old coolant out so I’m not mixing new green with old Dexcool?
2. Would the thermostat be left in place or gutted out? Seems like it would have to be gutted or removed and a gasket found.
3. To get all the tap water out, would you suggest pulling the knock sensor and other drain plug on the block?
I always consider rockauto. My default choice is the Spectra, though I also can't tell which filler neck I have. Mine measures just over 1" taller than the top of the side tank, but in the pictures the raised neck seems 2-3" tall and the lower neck looks almost flush.
I'd prefer an all-aluminum, but I had two Mishimotos fail from shoddy construction in my Jeep, and they're the only 3rd party brand making radiators for these trucks that I'm familiar with. Spectra's been good quality in my experience, even though I'd rather not have plastic.