'93 940 loud injectors

e777 · Post by **e777** » 23 Jun 2013, 08:04

Hello,

In December I fitted a rebuilt head to a newly acquired 93 940 wagon (purchased from the original owner with 215k miles).

The car runs beautifully. But, there is a persistent loud clicking coming from the injectors. I am 100% sure it is not the valves. The valves are within spec and I determined via the ol' mechanics stethoscope (a long screwdriver place to the ear) that the sound is definitely coming from the injectors.

Has anybody experienced this? What's the deal?

Post by **rgk** » 24 Jun 2013, 12:06

I used to think a strange ticking sound was coming from my lifters or injectors until I realized the sound stopped when the car went into third gear. It turns out second gear is a bit noisy in my 245.

Have you tried cleaning the injectors and replacing o-rings and caps?

e777 · Post by **e777** » 24 Jun 2013, 12:22

Thanks for the info. Yes, that is something I should definitely do. Of course, I have had other Volvos whose engines and injection components were very worn and they never sounded like this. It almost sounds like a diesel engine at times. In any case, I will do the injector seals and caps and see if things change. Cheers.

Post by **rgk** » 24 Jun 2013, 12:26

No problem, I hope it helps. My local auto parts store had a kit with o-rings, cap, and all. The old caps were a bit stubborn, but came off with some prying.