Coolant Leaks On The 3400 And 3800 Engines


Why does my 2006 Chevy Impala 3.5 Engine No Heat
Had to add coolant. Especially when sitting at an idle. I checked the antifreeze, and it was low. I dont see any leaks on the ground. I had a pressure check done, but they did not find anything. Can you help, it is quite cold by me this time of year.

Replacing 3400 V6 Intake Manifold Gaskets
how to adjust valves, 3.4 v6, 1999.To replace intake gaskets what is the procedure for installing correct length push rods in the right spot and valve adjustment after taking push rods out of way to get gaskets. In I am former gm tech.

Pictures of Common Areas of Dexcool Antifreeze Leaks on 31L and 3400 V6.

Oldsmobile Aurora Overheat, Radiator Coolant Fans Work
I pressure checked system at 15psi for 15 min. Held steady. Drove for a couple of days, and was loosing coolant. Found the radiator tank cracked on left side. (funny pressure test didn't find this). Replaced radiator and still runs at 250 and pukes a little coolant out of the overflow. Though when I get done driving 20 miles home from work, and check fluid it is just low, not blowing out.

Code P0128 on My 2001 Oldsmobile
Service engine light on again, pulled codes and it said engine temp too low to regulate, and temp gauge does not register. Replaced Coolant temp sensor ECT, no help. What could be the problem?

How to Change Water Pump On Pontiac Grand Am
To remove the water pump, first, make sure engine is cool and no pressure in the system, remove the belt. Then hold the pump pulley tightly and remove the 4 10mm bolts...

Buick Lesabre 3800 V6 Coolant Leak
Won't crank to start. One day it started riding funny so i pulled over and turned the car off when i lifted up the hood it was no water in it and there was no sign of leakage. I put Dexcool in it, but then it wouldn't crank.

Question: Right now i only have water in my radiator, there is a small leak i want to pin point can i use (RIT) fabric dye. Will it hurt any thing?? Will it work? I know at O'reilly's they have a small bottle of tracer it may be the same thing or it may have mercury in it and i may not want to use that.
 Answer: Use the dye from the parts store. It is made for automotive use. Using anything else- who knows what kind of reaction the coolant and components will have.

I have a chevy suburban. It is leaking on left side facing forward. I understand it is caused by an intake valve. Never knew the cooling system had an intake valve. What must I do????
 Aluminum valve screws into the intake manifold. Probably broke. Will need to remove, maybe tap new threads, worst case- remove manifold or maybe even replace if corrosion is real bad.

I added one litre of windshield washer (methyl alcohol - minus 40C rating) to my Dex-Cool antifreeze in error. Shall I replace the antifreeze or will it not cause any harm.
 I would absolutely change the coolant. Do a system clean and flush with a kit from your local parts store. Washer fluid is very corrosive, and Dexcool has enough of its own problems.

How do i get the air out of my cooling system?
 Depending on the engine size, it can be difficult. On the 3400 there is a bleeder screw on the tube above the water pump and one on the thermostat housing. Open those until it starts coming out. 3800 has one only on the thermostat housing.

I was replacing plug wires on a model year 2000,land rover discovery 2. Removed the intake plenum to do so, after doing so I now have an issue of a leak around my radiator jug cap, have inspected the neck of the jug, replaced the cap, and the thermostat, tried a method for bleeding air out of the system, in case that was the problem, the gauge always read correct, never reading hot,blows cold air out of the vents in th car, with the heater on, what do you think.
 If the heater is blowing cold air, and coolant is leaking past the cap, then the engine is overheating. The pressure is getting too high for the cap to contain. Check for leaks, or a possible head gasket problem.

I have a 2000 Oldsmobile Intrigue and am having problems with it overheating all the time. Mainly when driving it other than that it can idle for hours and not even register at half on temp gage. I have went through 2 reservoirs already because it has gotten so hot it has worn a whole in it because of so much pressure build up. We have also bled the coolant system to get all air out and it seems to still be getting air in it somewhere but does not have any visible leaks anywhere. We also changed the water pump just in case it wasn't working right. We have flushed the system out probably over 3-4 times. Again, we are stumped and need some help/answers. Someone please help us. Thanks.
 The key to your problem is the fact that you keep getting air in the system. This is a sign of a blown head gasket.

What the problem when the coolant fans and ac clutch will not work with engine and ac on.
 Check fuses and relays. It depends on what type of car you are talking about. Could be multiple problems with your vehicle.

What to do if the coolant tank is leaking?
 If it is just leaking, then replace it. If the system is building too much pressure and boiling over, then you need to fix why it is overheating.

is it hard to replace a coolant elbow on a 3800 6 cylinder?
 You must remove the entire belt tensioner bracket. The ones that are not broken, will now get broken, so just replaced both / all of them. The part that goes into the lower intake manifold can be difficult to remove the broken part. Sometimes you have to cut 3 slits in it to break it away from inside.


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