1998 BMW 528 overheating

1998 BMW 528
135,750 MILES • 6 CYL • 2WD • AUTOMATIC
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MARVS36
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  • 1 POST
my car started overheating, I took it to my local shop, where they replaced the raditor, water pump, thermostate and housing, all hoses. I picked it up this morning and now it is overheating again.
What could be the problem and how hard would it be to fix?
May 19, 2009 at 3:09 PM
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RASMATAZ
  • CAR REPAIR CONTRIBUTOR
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Have it block and pressure tested-do the block first to pinpoint a combustion leaking into the cooling system or a gas analyzer to sniff for hydrocarbons at the radiator fill neck.

Pressure test: do not do a pressure test if there's leakage at the headgasket this might cause coolant into the cylinders and lock it up or bend a connecting rod if cranked thereafter. The headgasket should be repaired before doing the pressure test.

If the block and pressure test passes check the following: ,Pressure test the Rad. cap,Clogged radiator,air lock in the cooling system ,Fan clutch,Radiator electrical fan,collaspe hoses,water pump.
May 19, 2009 at 4:51 PM
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