Radiator replacement - What should I be replacing while I'm there?

[Charlie207]

Per some earlier posts this week, I ordered a new radiator to replace the stock (I assume) unit that's seeping along the endcaps.

Now... pretend I've never dealt with a 5.3 before (because I haven't), and tell me what else I should order before doing this job.

I've already replaced the coolant overflow tank, which solved one of the leaks. But, I see the TOC and EOC lines are seeping fluid as well - at the hard-line/hose crimps. So, I'm looking to replace those too.

I'm also pretty sure my engine mount(s) are bad, so I'm looking at the Hummer H3 mounts to add to the list.

What else is worth ordering while I'm already torching my credit card?

 

[m1949]

If its the original and/or depending on miles, the water pump? Easier to change when radiator is already out. Same with serpentine belt.

 

[donjetman]

x2 what @m1949 said
also, New coolant, new heater hoses, and new heater hose t-fittings.

 

[Charlie207]

Is there a curated "kit" that includes the core parts, as opposed to ordering all individually?

 

[Foggy]

Is there a curated "kit" that includes the core parts, as opposed to ordering all individually?

No there is not.
Belt, Tensioner Assembly, Upper & Lower Hoses, TStat, Water Pump and Heater Hose Tee Fittings that go to rear
Heater. -- these are plastic and known to fail at bad times. For the Tee's I just went to local dealer, they carried them in stock...
The rest you can order from RA at a good price... Use the AC Delco/Gm water pump & T Stat. Gates or Dayco Hoses are fine.
GM only heater Tee's - not the dorman or other- You'll get another 10 years out of the GM ones
Radiator itself most are fine for stock type apps w/o heavy towing
Gates usually has a Belt Kit that has both belts, tens, idler

 

[cmatt]

I just did this same thing last weekend. Good advice from others. A good set of remote hose clamp pliers will save you frustration on the lower radiator hose (ask me how I know lol). Only thing I didn't replace was the water pump. I did also replace the AC stretch belt (with GM OE) as I believe it was original and coolant poured all over it when I removed the T stat. I flushed both heater cores and the block with water to the best of my ability. I then used shop air at low pressure to push the water out of the system.

I used this + some clear tubing from Home Depot to flush and evacuate the water https://www.amazon.com/Mityvac-MV45...45215321&sprefix=mityvac+coola,aps,397&sr=8-6

Used this to refill the system quickly with no air pockets https://www.amazon.com/Robinair-752...efix=robinaire+vacuum+coolant+,aps,297&sr=8-1

I may be willing to part with the Robinair coolant refiller at a discount since I'll likely not need it for some time. Used once. Worked great. PM if interested.

 

[OR VietVet]

All the above and the idler/tensioners as well.