Help overheating since last engine rebuild
Help overheating since last engine rebuild My car is a 2000 z28 with a tc-78 turbo and Long story short this is my 4th engine and not because of this problem. but since I put this one in which is a 6.0 with forged internals and 317s for heads, I all of a sudden have a overheating problem.I did not touch nor change anything related to the cooling system. And I know I got the air bled out and stuff along those lines this ain't my first time filling the system. My temps use to be 180-190 with a 160 t-stat but now they are 210-240 might get hotter but I kill it first.
I do have the griffin radiator required for standing it up have always had it
Things I have checked
1. I looked though water pump ports to make sure head gaskets are on right and which they are.
2. I replaced the t-stat with a oem one.
3. I replaced the radiator cap.
4. I added two pusher fans along with one current puller.
5. Jacked the front of car up with filling funnel on radiator and ran till it got to temp with heat on high.
Car is still Gettin up past 212 at idle can someone please help me out my next choose is to pull the heads and hope I see something. And so you don't ask I built motor along with the last three I'm not sayin I'm good but I know my car and have never had this
Oh and when I shut it off you can feel it gargling in the upper hose and if the cap is on then all the hoses get rock hard after you shut it off.
Any help would be awesome ls1tech has always had the info I needed but this one is kickin my ***.
I do have the griffin radiator required for standing it up have always had it
Things I have checked
1. I looked though water pump ports to make sure head gaskets are on right and which they are.
2. I replaced the t-stat with a oem one.
3. I replaced the radiator cap.
4. I added two pusher fans along with one current puller.
5. Jacked the front of car up with filling funnel on radiator and ran till it got to temp with heat on high.
Car is still Gettin up past 212 at idle can someone please help me out my next choose is to pull the heads and hope I see something. And so you don't ask I built motor along with the last three I'm not sayin I'm good but I know my car and have never had this
Oh and when I shut it off you can feel it gargling in the upper hose and if the cap is on then all the hoses get rock hard after you shut it off.
Any help would be awesome ls1tech has always had the info I needed but this one is kickin my ***.
I know you said you've bled the air out of the system but sometimes it can be a pain in the *** to get the air bled out of these cars. Can you feel the thermostat opening? Put your hand on the top radiator hose, you should feel coolant flowing through it. If not you have air in the system. The thermostat will not open if there is air on the back side of it. Try cracking your coolant cross over lines loose on your heads.
What is your a/f/ ratio? Vacuum leak maybe?
That is because its hot.
Oh and when I shut it off you can feel it gargling in the upper hose and if the cap is on then all the hoses get rock hard after you shut it off.
There is no way there is air in it I filled blocked tho the upper hose with the steam vents off then filled radiator and ran for 30 min all hoses got hot and the afr's at idle are around 13.5-15. it "was" lean but I reflashed it and it's not anymore cause I was thinkin that could of been the problem. I had to use a different block this time around and one head but I had them checked out and surfaced I work at a machine shop so I don't think it could be a crack somewhere.
i bet the pusher fans are doing more harm then good, I had 2 pushers on my car and it would over heat in a few minutes sitting in my driveway or driving around, after i removed them it was night and day difference. The pusher fans are blocking the air from getting into the radiator and messing it up
Trending Topics
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
Since this is happening at idle...keep an eye on the temp. As it heats up run cold water across the radiator...see what happens with the temp. If you have an infared thermometer..measure the temp in several spots across the radiator.
A couple "outside the box" ??'s.
1. Turbo dragging, exh system plugged, causing hi exh gas back psi? [Still have the cat[s] on it?]
2. What is the MAP @ idle, & KOEO?
3. Idle timing?
As for idling @212*...Is that with the OEM stat? [My truck runs @ that temp w/ the OEM stat]
1. Turbo dragging, exh system plugged, causing hi exh gas back psi? [Still have the cat[s] on it?]
2. What is the MAP @ idle, & KOEO?
3. Idle timing?
As for idling @212*...Is that with the OEM stat? [My truck runs @ that temp w/ the OEM stat]
