We have oil filters, caps, rotors, plug wires, plugs, PCV valves, and O2 sensors. What else would be done at tune-up/oil change time?
Check all fluid levels--but discussion of which oil to use, which brake fluid is best, "DeathCool" antifreeze, etc. will take up a huge amount of bandwidth with no resolution or consensus in sight.
I pour a bottle of Chevron Techron into the gas tank at every oil change. I suppose other brands of fuel system cleaner are acceptable, but I believe Techron is the best. Chevron used to--and perhaps still does--supply fuel system cleaner in AC-Delco bottles. I notice that Delco now has several fuel system cleaner products. I'm thinking that the Techron was sold as AC-Delco "X-66" or some similar variation of that number. The product was supposed to be an effective cleaner for injectors, intake valves, etc., but also removed sulfur deposits on the fuel-level sending unit.
Fuel filters? My '88 K1500 5.7L takes NAPA FIL-3481 ($17) or the cheapie SFI-23481 ($6)
How about a filter for the charcoal canister? NOBODY ever looks at them. [Later Edit] Not all vehicles have a replaceable filter on the canister[/Later Edit]
Some vehicles have a PCV filter. I don't know about the range of engines available in GM 400s.
I've been known to spray the outside of my Throttle Body (or carburetor, depending on vehicle) with aerosol carb cleaner, now and then, but I buy whatever is on sale at the time--Cyclo, Gunk, Mac's, CRC...I'm not brand-loyal 'cause it's pretty-much all the same chemicals in different aerosol cans.
Distributor "hard-parts" such as pickup coils, modules, and ignition coils aren't really "tune-up" items.
Accessory drive belt(s) and radiator caps aren't really tune-up items either, but checking them at tune-up time is a good idea.
Check all fluid levels--but discussion of which oil to use, which brake fluid is best, "DeathCool" antifreeze, etc. will take up a huge amount of bandwidth with no resolution or consensus in sight.
I pour a bottle of Chevron Techron into the gas tank at every oil change. I suppose other brands of fuel system cleaner are acceptable, but I believe Techron is the best. Chevron used to--and perhaps still does--supply fuel system cleaner in AC-Delco bottles. I notice that Delco now has several fuel system cleaner products. I'm thinking that the Techron was sold as AC-Delco "X-66" or some similar variation of that number. The product was supposed to be an effective cleaner for injectors, intake valves, etc., but also removed sulfur deposits on the fuel-level sending unit.
Fuel filters? My '88 K1500 5.7L takes NAPA FIL-3481 ($17) or the cheapie SFI-23481 ($6)
How about a filter for the charcoal canister? NOBODY ever looks at them. [Later Edit] Not all vehicles have a replaceable filter on the canister[/Later Edit]
Some vehicles have a PCV filter. I don't know about the range of engines available in GM 400s.
I've been known to spray the outside of my Throttle Body (or carburetor, depending on vehicle) with aerosol carb cleaner, now and then, but I buy whatever is on sale at the time--Cyclo, Gunk, Mac's, CRC...I'm not brand-loyal 'cause it's pretty-much all the same chemicals in different aerosol cans.
Distributor "hard-parts" such as pickup coils, modules, and ignition coils aren't really "tune-up" items.
Accessory drive belt(s) and radiator caps aren't really tune-up items either, but checking them at tune-up time is a good idea.
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