'99 Cadillac Deville V8, when it gets warm it starts pushing the coolant out of the overflow. Otherwise seems to run fine. Suposedly has new waterpump, thermostat, radiator and hoses.
Announcement
Collapse
No announcement yet.
32v Northstar V8 vomiting coolant
Collapse
X
-
sounds like the old owner threw everything possible at the overheating issue aside from the notorious blown head gaskets.Originally posted by PGreenCobraI can't get over the fact that you get to go live the rest of your life, knowing that someone made a Halloween costume out of you. LMAO!!Originally posted by Trip McNeelyOriginally posted by dsrtuckteezydont downshift!!
Comment
-
check the oil for coolant."When the people find that they can vote themselves money, that will herald the end of the republic." -Benjamin Franklin
"A democracy will continue to exist up until the time that voters discover that they can vote themselves generous gifts from the public treasury." -Alexander Fraser Tytler
Comment
-
Originally posted by 4king View PostReplace the radiator cap and burp the system. My mustang did the same thing after it got an air pocket in it.
Originally posted by Baron View Postand blown head gaskets.
Originally posted by AArod View PostNotorious for headgaskets and head bolts pulling out of the block.
I'm trying to wrap my head around the fault in the process.
Originally posted by DON SVO View Postsounds like the old owner threw everything possible at the overheating issue aside from the notorious blown head gaskets.
Originally posted by CJ View Postcheck the oil for coolant.
Originally posted by dangerous_sep View Postooooorrrr throw that bitch in the garbage where it belongs!
Comment
-
Generally, when the Northstar has a head gasket issue it just blows all of the coolant out through the exhaust. Mine never boiled over, just had to keep adding.
The problem is the design of the Northstar has large openings of the water jackets without adequate support. There is a term for this that I cannot remember off the top of my head.
The fix is to take the engine out of the car, remove the heads, and Time-sert all of head bolt holes. The job isn't all that bad but is time intensive. The cradle -engine, trans, steering, suspension - all comes out of the bottom of the car pretty easily. Getting the timing chains back in time is the most difficult part of the whole ordeal. Be sure to use new head bolts as they are TTY.
Comment
-
Have your buddy do a leakdown test and determine whether or not it is the headgasket and which one. The front bank can easily be done with the engine in the car although it is a royal pain in the backside to get the timing chains back in time. If the rear bank has the problem the engine is coming out.
Who knows, it could be something else entirely.
Comment
-
Originally posted by slow84lx View PostGenerally, when the Northstar has a head gasket issue it just blows all of the coolant out through the exhaust. Mine never boiled over, just had to keep adding.
The problem is the design of the Northstar has large openings of the water jackets without adequate support. There is a term for this that I cannot remember off the top of my head.
The fix is to take the engine out of the car, remove the heads, and Time-sert all of head bolt holes. The job isn't all that bad but is time intensive. The cradle -engine, trans, steering, suspension - all comes out of the bottom of the car pretty easily. Getting the timing chains back in time is the most difficult part of the whole ordeal. Be sure to use new head bolts as they are TTY.
I wondered if unbolting the front subframe was the ticket, or how hard it would be to fix the threads in the block.
Answered a few questions I had, but you said it blows out the exhaust....could it push it back through the system and out the overflow? That would mean compression leaking into the jackets, correct?
Comment
-
Originally posted by slow84lx View PostHave your buddy do a leakdown test and determine whether or not it is the headgasket and which one. The front bank can easily be done with the engine in the car although it is a royal pain in the backside to get the timing chains back in time. If the rear bank has the problem the engine is coming out.
Who knows, it could be something else entirely.
It be a shame to scrap it.
Comment
-
Yes, it could blow back out through the cooling system and this is probably what is happening in this case but verify with a leakdown test.
Unbolting the cradle - 6 bolts - is definitely the easiest way to remove the engine from a Caddy. I lifted the front of mine in the garage with my engine hoist. You need to have a sturdy 4-wheeled dolly under the engine when you do this so it can just roll out. You will need 2 good floor jacks also.
I did this by myself and have done the same basic process twice.
These cars are way too nice to scrap but the headgasket issues these come with is a big downside.
Comment
Comment