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Partial answer i think... (archive)

[ Follow Ups ] [ 5-series (E34) Message Board ] [ Msg. Board FAQ ]

Posted by Jeff N. on October 17, 2001 at 13:43:41:

In Reply to: Coolant leak in Throttle body? posted by Randy on October 17, 2001 at 12:11:32:

I'm not familiar with this engine but typically coolant is run through the intake manifold to pre-heat the air. I believe this is part of an emmisions control strategy but I can't elaborate.

If you've replaced the hoses and it's not leaking water, you likely need to vent the system and continue to fill.

A Bentley's manual can outline the fill process for your engine. Sorry I can't help more.

Cheers!

Jeff
90 535i


My son just bought a '90 525i (M20 engine) that had the two coolant hoses that should go into the throttle body connected to each other, by-passing the TB. Figuring that configuration would not pass CA smog, I hooked them back as they should be. Now the radiator is nearly empty. Why does coolant run through the throttle body and what is the fix for the leak?

Thanks

Randy





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