mid 70's bottem end, 1990 top end, 90 water pump...overheating!!!
i've heard yay's and nay's about the way the wayer pump is spinning on the older style block being a newer style pump...could this be the reason it overhats and collapses the bottom hose
01-23-2010 09:38 PM
What type of engine is it? You may be running a reverse rotation water pump standard direction,with the impller spinning the wrong direction it wont move much water at all.
01-23-2010 09:40 PM
Answered your own question. It's trying to pump water if it's collapsing the lower hose but you need a better lower hose or spring in it to prevent collapsing because a collapsed hose won't allow flow.
01-24-2010 07:31 AM
Agreed, the collapsed hose will cause overheating bigtime, and if it's sucking the bottom hose shut, chances are it's the correct rotation. :cool:
01-24-2010 07:51 AM
Or Even a plugged radiator will cause the lower hose to flatten :thumbup: