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1988 760T vacuum hose question, the jock is stumped! 700 1988

uid 55's pic
posted by  john sargent on  Sun Mar 2 13:43 CST 2003
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last visit: Wed Oct 22 09:07 CST 2014
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I am finishing installing the 1991 B230FT in the 1988 760T which suffered the broken connecting rod. I don't know where to connect the large vacuum hoses for the ACC and vacuum reservoir, and if there is a vacuum reservoir and/or vacuum boost pump.

This later style 760T has a vacuum hose routing which I am unfamiliar with and my 740T and earlier 760T experience doesn't help. As shown in the picture below, the intake manfold (this is the one from the original engine) has a short vacuum line with a tee on it, and a check valve on one branch of the tee. The vacuum line coming from the ACC also has a check valve as shown in the picture. I need another vacuum line to connect to the tee, and I don't understand the purpose of two vacuum check valves. The earlier 760Ts have a vacuum pump which provides vacuum for the ACC when necessary. Also, the earlier 760Ts have a vacuum reservoir either behind the front bumper (1987), or just in front of the front suspension crossmember (1986 and earlier).



Unfortunately I didn't get to remove the intake manifold and vacuum hoses. that was done by the person who owned the car before me.

Who can help the stumped Volvo jock?






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