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Replace a Spare part Coolant Flange – a defective one or if the limit of use has been already reached. Find out useful information about Coolant Flange

Flange is a multifunctional car part. First, it connects blocks and pipes. Second, it is used for fixation and sealing. Flange fulfils many “obligations”. There are a lot of flange types: inlet flange, coolant flange, gearbox flange. As a rule, in the course of time plastic flanges badly adjacent to the seal, although the problem may be with the seal. It is worth to mention, that such problems occur not only with the plastic flanges, but with flanges made of other materials.

The possible result of the flange bolts’ weakening is the fact that when you start the car, it reacts with jerks and blows and when driving there appears as a rattling roar. Pull the mounting flange bolts to the rear axle drive flange and flexible coupling mounting bolts pull to the gear shaft flange. But remember that when you check the flange, it is necessary to verify whether there are no increased beats of rear axle pinion flange and the drive shafts are not bent. If you hear the beat of the rear axle pinion flange, when rocking the flange with arm, be sure to remove the flange from the pinion. But before that disconnect the driveshaft, replace this part and install it.

We advise car owners not to buy driveshaft or flange from service centres or dealers. It will cost you very expensive. It is much cheaper to order all the necessary details, including the pulse sensor and wheel arch in the online store. Do not believe the promises of the usual shops that there you can buy the cheapest and quality car parts, this is not the case. We can guarantee you the highest quality and reasonable prices. To verify this just look through our catalogue.

Coolant Flange for AUDI A4 (8D2, B5), VW GOLF IV (1J1), VW GOLF IV (1J1)

Faults of flange
  • cracks;
  • corrosion on the working surface;
  • blockage of the flange;
  • displacement of the part.
Symptoms of flange faults
  • a gradual decrease in the antifreeze level;
  • appearance of coolant traces;
  • frequent engine overheating;
  • reduction in engine power;
  • increased fuel consumption;
  • antifreeze smell in the cabin.
Causes of flange faults
  • temperature changes;
  • impact of reactive chemicals;
  • wear;
  • Improper maintenance of the cooling system;
  • exposure to moisture and dirt.
Diagnosis of flange

It is recommended to check that there are no leaks and control the level of anti-freeze daily. Every 10 thousand kilometers run requires a mandatory diagnosis. Inspect if there are cracks in the part or there is a leak from the flange. The best diagnosis option is checking the fluid level in the expansion tank. This figure should be 30-40 mm above the minimum level. Recall that when the engine is running, and for several minutes after stopping the liquid level can be increased.

Replacement of flange

Due to the low cost of the flange it is wiser to immediately replace the kit, rather than spending time and money on repairs. To replace the faulty flange for the new, you should:

  • drain antifreeze into the prepared container;
  • disconnect hoses;
  • when replacing the front flange disconnect the electrical wiring to the coolant temperature sensor;
  • unscrew the replacement part and carefully remove it;
  • prepare the place where you want to install the new part (may need cleaning with a file and degreasing);
  • apply sealant to the installed part and mount it on the seat;
  • tighten the nuts;
  • attach hoses;
  • set the coolant temperature sensor;
  • pour antifreeze.

Thereafter, it is recommended to start the engine, bringing it up to operating temperature, gradually add the engine speed to medium (or higher) and hold for several minutes. If necessary, add antifreeze into the tank to bring it to the desired level. This procedure is required to bring air out of the cooling system. We remind you that the flange should be replaced every two years, and in some cases every 60 thousand kilometers.

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