Cadillac Seville / Cadillac Eldorado Forum Discussion, 83 eldorado accessory ticking, stumped in Past Cadillac Vehicle Discussion; Hi all new here, Ive got an eldorado with a 4.1. I replaced a valve cover last week and in ...
Hi all new here, Ive got an eldorado with a 4.1. I replaced a valve cover last week and in the process i removed the outlet hose on the vacuum pump. After completing the repair i started the car and a very loud, rpm dependent tick was noticable. It is coming from the vacuum pump. If i remove the vacuum pumps belt or plug the intake hose to the pump the sound goes away. But ive already replaced the vacuum pump twice and still the same ticking. Any ideas? Or experience?
Automobile(s): 1988 Allante' (sold), 1984 Eldorado, 84 Sedan DeVille
Re: 83 eldorado accessory ticking, stumped
A shot in the dark, but the vacuum pump hose goes to a metal manifold above the driver exhaust manifold. Are there any hoses split or disconnected there? Maybe with a hose off the pump has less internal pressure and might knock.