Question about 2001 Buick Century

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Aluminum radiator plastic end cap

The plastic part on side of radiator has a crack and leaks how can I repair it

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  • Crystal Beck
    Crystal Beck Mar 24, 2014

    so u dont recommend k seal

  • Crystal Beck
    Crystal Beck Mar 24, 2014

    so u dont reccomend kseal



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Check out this site it might be of help to you.
Plastic Radiator Repair

Posted on Mar 24, 2014

  • Stuart Dawson Mar 25, 2014

    You can try it if you like, just so long as the crack is not too bad.



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What could be causing my 1994 nissan sentra to want to overheat (run hot)?

Usual over heating issues lead to waterpump failure-when running the motor- pop the hood to listen for what sound like marbles or bearings rolling around on the side of the block, also if you see coolant leaking out of the weep holes- your water pump has failed. Other trouble shooting you can do is check the thermostat to see if it opens at the correct temp- i remember a couple years ago i had thought my thermostat was faulty so what i did is I placed it in pan of water with a thermometer, as i gradually increased water temp thermostat opened like it should. So that eliminated that possible cause. Also check for coolant temp sensor or possible coolant leaks along the seams of the OEM radiator. The OEM radiator came with plastic end tanks- i should know- mine had a coolant leak appear just at the top near the radiator cap. Drove me crazy until i cleaned my entire motor and ran the motor and sure enough- the little green leak started appearing right there at the seam. Replaced it with a OEM new one (or go with a Koyo if you can find one cheap)with aluminum welded end tanks(no plastic to crack) and no more problems- mine has been leak free ever since. Also check to make sure fans are wired properly. Go by process of elimination-sometimes your expensive leak could be solved cheaper.

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My 2001 Olds Aurora is leaking antifreeze. Someone looked and said it was a cap, that you can only get from the dealership. Any ideas to what the name of the cap is?

the cap is on the 'overflow bucket' near the fender well. Those radiators have plastic tanks on the sides and they will crack over time. Many won't leak until the car is warmed up and the plastic expands, opening the crack.

Dec 04, 2012 | Oldsmobile Cars & Trucks

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Radiator leak

Absolutely, there's a ton of epoxy's and resin's you can buy now days to fix this, but you will also need a vented radiator cap to prevent pressure from re-opening leak. I used a certain gasket sealer to fix multiple cracks in a plastic radiator and it still holds to this day!

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Losing a lot of coolant. I don't see a leak. I started to drain the system and it smells burnt to s**t. What might my problem and possible solutions be?

see this causes and fix it. God bless you
Water pump -- A bad shaft seal will allow coolant to dribble out of the vent hole just under the water pump pulley shaft. If the water pump is a two-piece unit with a backing plate, the gasket between the housing and back cover may be leaking. The gasket or o-ring that seals the pump to the engine front cover on cover-mounted water pumps can also leak coolant. Look for stains, discoloration or liquid coolant on the outside of the water pump or engine.
Radiator -- Radiators can develop leaks around upper or loser hose connections as a result of vibration. The seams where the core is mated to the end tanks is another place where leaks frequently develop, especially on aluminum radiators with plastic end tanks. On copper/brass radiators, leaks typically occur where the cooling tubes in the core are connected or soldered to the core headers. The core itself is also vulnerable to stone damage. Internal corrosion caused by old coolant that has never been changed can also eat through the metal in the radiator, causing it to leak.
Most cooling systems today are designed to operate at 8 to 14 psi. If the radiator can't hold pressure, your engine will overheat and lose coolant.
Hoses -- Cracks, pinholes or splits in a radiator hose or heater hose will leak coolant. A hose leak will usually send a stream of hot coolant spraying out of the hose. A corroded hose connection or a loose or damaged hose clamp may also allow coolant to leak from the end of a hose. Sometimes the leak may only occur once the hose gets hot and the pinhole or crack opens up.

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aluminum radiator
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find a local radiator shop to replace top seal and top plastic part
of that radiator
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replace the thermostat

pressure is too much on that crack for any diy repair product

pop off hose at the wrong time =cook the motor


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1 Answer

Ifall radiator fluid leaks out and there is no holes in hoses where can the fluid com from

The seams where the plastic end tanks attach to the aluminum core body. There is a gasket in a slot on these to make the seal. They can leak, and if cold enough will weep slightly.

There is also a small chance there are some hairline cracks in the plastic tanks which are not hgihly visible until they are leaking.

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the easiest way to tell if it is Metal or Aluminum is with a Magnet if it sticks its metal if not then its aluminum otherwise it may be both as the ribs are usually aluminum and brass for the vent-tubes

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Im wondering are your fans strong enough to cool down that aluminum radiator.

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I doubt you can actually fix it "yourself", but you can save lots of money by taking it to a radiator shop instead of buying a used or new radiator. They can replace the plastic tank for the bad side, but it is usually the drivers side because this is where the hottest water exits the engine and causes the plastic to crack. I removed the radiator myself and took mine to a shop and they repaired it for $40........cannot repair yourself because the tank has to be crimped on!!!! And radiator "stop leak" products will not work because they are for metal tanks!!!

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