6.2 swap thread

[ls1frc]

I have the same setup as my 5.3. It's dual fan, oil cooler and trans cooler. It's running cooler after the overflow cap, but still seems higher than it should be in 45 degree weather. Seems to just be at idle though, so maybe it's normal. Cruising is 205-210.

Idle will get up to 215-220, but comes right back down when moving.

 

[1BADI5]

One thing I am not liking is my coolant temps seem too high with the replacement mishimoto.

I am consistently 208-216 and it's only 45-50 degrees outside. Fans even kick on periodically.

My radiator cap was bad (it literally fell apart) and I just replaced that, so maybe some air got in there. Also when I did the water pump, I got the professional not the OEM replacement AC/Delco.

Any suggestions?

Edit
Wow looking at the reviews of the professional pump version, lot of 1 stars. I think I will replace it with the OEM for peace of mind since I am going on a road trip soon.

https://www.amazon.com/ACDelco-252-...uPWNsaWNrUmVkaXJlY3QmZG9Ob3RMb2dDbGljaz10cnVl

Drive the nose up on to ramps, pop the cap, turn the heat on and let it run for a bit. With the nose up it should burp out the air bubbles and air pockets pretty quick.

My truck runs between 197-201* regardless of the ambient air temp.

 

[kbuskill]

I have the same setup as my 5.3. It's dual fan, oil cooler and trans cooler. It's running cooler after the overflow cap, but still seems higher than it should be in 45 degree weather. Seems to just be at idle though, so maybe it's normal. Cruising is 205-210.

Idle will get up to 215-220, but comes right back down when moving.

Drive the nose up on to ramps, pop the cap, turn the heat on and let it run for a bit. With the nose up it should burp out the air bubbles and air pockets pretty quick.

My truck runs between 197-201* regardless of the ambient air temp.

Are these temperatures based on the gauge on the dash or via OBD2 readings?

My truck runs 192°-194° consistently no matter the outside temperature.

@1BADI5 is correct though. Get the nose up in the air, the higher the better. Back it down into a ditch or whatever it takes.

 

[ls1frc]

Reading with HPTuners

 

[1BADI5]

Mine is via OBD2 as well

 

[ls1frc]

So it peaked at 217 just now waiting for my son to get out of school.

Low fan kicked on and it easily got back down to about 195 and didn't go higher than 205 from then. Seems erratic.

 

[ls1frc]

Took a 0-60 video and it came out terrible because of sun glare. If anyone has interest in seeing, I'll upload it. I'd take another one, but I always feel weird about stopping in the middle of a road to do a blast lol.

 

[FrankU]

I'd like to see it and compare to what mine does.

 

[ls1frc]

I timed this at 5.3 seconds. It is short shifting 1st a bit, I am losing about 400 RPMS. I raised my shift point and will do another test if I can. I know the LSXCalade guy got 5.6 0-60 stock stall with headers and stock cam, so this sounds about right. Be cool to hit 5.1 with a longer first gear and E85.

Here was his old video before he made his Escalade 2000 hp

 

[ls1frc]

It's funny how your brain plays tricks on you. I could have sworn the 5.3 "felt" about as fast from a 2nd gear roll.

At the end of this video with the old setup, I do a little blip and it's crawling lol. It's not even close to the same.

 

[ls1frc]

Well this is much better.

 

[FrankU]

It sure has some kick ! Stalling at 2-2200 , you like that ZL1 converter now ?

 

[ls1frc]

It sure has some kick ! Stalling at 2-2200 , you like that ZL1 converter now ?

Yeah for what it is, I'm pretty happy with it. Not sure how far I wanna take it, I always need more but there comes a point where "more" creates too many headaches.

Yeah the ZL1 converter was a good budget choice, feels the same as the stock one. Gas mileage not affected too much either. I burned through my entire tank of gas in 3 days though with all these WOT runs lol.

 

[ls1frc]

New water pump is in but had a terrible scare. Thought I was good after filling up radiator and letting it idle so I went for a drive, the temp gauge immediately spiked to 260. I shut off the engine and coasted.

I started it back up to see if maybe if it was just a giant air pocket and luckily it was. The temp came rushing back down to the normal 200-210. Whew.

The quality of the OEM water pump vs the crappy chinese one I had in there was night and day. The pulley was already sounding terrible on the chinese one. Just the overall finish of it was trash by comparison.

I bought this along with a chinese a/c delco professional alternator back in 2019, before my "buy once, cry once" motto I now live by. I am going to tear that alternator off too and just put on a new OEM one. Sucks paying twice, but it's pointless to risk it if I am going to take long road trips with this thing.

 

[ls1frc]

Just checked and my battery is the original from 2012, amazing. I will replace that too. Adds up quick!

 

[iamdub]

New water pump is in but had a terrible scare. Thought I was good after filling up radiator and letting it idle so I went for a drive, the temp gauge immediately spiked to 260. I shut off the engine and coasted.

I started it back up to see if maybe if it was just a giant air pocket and luckily it was. The temp came rushing back down to the normal 200-210. Whew.

The quality of the OEM water pump vs the crappy chinese one I had in there was night and day. The pulley was already sounding terrible on the chinese one. Just the overall finish of it was trash by comparison.

I bought this along with a chinese a/c delco professional alternator back in 2019, before my "buy once, cry once" motto I now live by. I am going to tear that alternator off too and just put on a new OEM one. Sucks paying twice, but it's pointless to risk it if I am going to take long road trips with this thing.

Weekend before last, I replaced the "GMB" brand water pump on my bro's truck. It lasted about 14 months. He went with an AC Delco Original this time. The GMB wasn't leaking, but that pulley was squealing and had 1/4" of slack in it. He's lucky that it failed while he was close to home.

 

[ls1frc]

Weekend before last, I replaced the "GMB" brand water pump on my bro's truck. It lasted about 14 months. He went with an AC Delco Original this time. The GMB wasn't leaking, but that pulley was squealing and had 1/4" of slack in it. He's lucky that it failed while he was close to home.

Yup they're junk!

I just data logged my truck and it doesn't go above 198 now. 20 degree difference. and it's 40 degrees hotter today.

My oil pressure was also 3 PSI higher fully warm, I guess keeping things a lot cooler.

 

[ls1frc]

Any battery recommendations?

 

[Geotrash]

Any battery recommendations?

They’re pricey, but I have a Duracell AGM battery from Batteries+Bulbs.


Sent from my iPhone using Tapatalk

 

[ls1frc]

Figured I would knock out a quick polish with menzerna 2500/3800 two step and Jescar power lock sealant. What a pain in the ass on such a large vehicle. Came out OK, I didn't do a meticulous job, just went over it once with each pad and didn't obsess about the results since it sits outside anyway. I will try to do this twice a year from now on.

Now that it looks great, I need to get it to sound great. I am still 90% sure it's valvetrain noise what I am dealing with, just seems too tappy to be piston slap. I am emailing BTR about the Delphi lifters to see if they're the same as the GM LS7. If they are, I will drop those in. Thinking about switching to GM blue springs and just a super mild .500 dropin cam as well.

I find with this vehicle, I'd rather have comfort over power anyway