348 Phase sensor replacement.

Thanks, Nick. Bookmarked!

Maybe we could have this one put in the sticky threads?

 

Nice job!

Thanks for sharing.

 

Nice job

 

I secretly smile on the idea of changing parts on Ferrari when nothing is actually broken (it puts food on my family table!). However if there were zero fault indications from your existing phase sensor, why did you chose to install a new one?

In my mind, the real issue would have been evidence of oil seepage from the lip seal behind that housing, 149917 or the paper gasket 150076. It looks perfectly dry in your photos. Right?

 

Yes, really. If you are worried about parts that are 30 years old you need to start replaced a lot more than the phase sensor.

 

Well, there are two choices: preventive maintenance and breakdown maintenance. I prefer the first one. The cam sensor is a Hall Effect transistor (not just a simple coil like the crank sensors) and can go without warning.

 

Great question, 2 reasons:
1) Consumable parts are old and have a shelf life. Like check valves for fuel venting, why wait for them to fail and fuel tank to crumple before going damn, I should have replaced them. Same for water temp and fan and oil temp switches, most things like that are cheap and consumable and prevent you from being stuck 300 miles from home in limp mode. I replaced every relay on my car, man they were old and corroded the inside could not be amazing. Hell I have a 2 page single spaced list of replacement things I'm working through, you have lots of my money already. Believe it or not simply replacing my actual window switches with NEW ones made the biggest difference in window speed. Those window accelerators did first did little. Go figure. Switches..... Stuff is old and almost all consumable parts simply work better new. DIY makes it affordable.

2) Its a project for many some of us like working on it and obsess about stupid things, its part of the fun. Every post where someone has a problem part that caused an issue wind up on my replace before failure list. Side mirror switch went bad prevented mirror working one post outlined, I found a new one, put it in, my mirror won't go bad for that reason and I have my original one as a spare.

I'm sure you get my orders and scratch your head "why the hell would any one replace the air injection check valve" or IAC valves. Yeah I don't know either but I know I wont break down because of them and I idle amazing.

 

That sensor, and the 355 one, suffers from high heat in the cabin. I have replaced a few of those where the connector portion of the sensor severely cracks and exposes inside wiring. The 348 one wasn't too bad but the 355 was an arm and a leg. Not a bad job.

 

If you don't mind a bit of soldering, you can actually replace just the "head" of the cam sensor. It is Siemens HKZ101 which is cross referenced, to name just a few, to ZD1900 and CYHME301 by other manufacturers. There are also many Chinese equivalents to the Siemens HKZ101 at just $16 (https://www.ebay.com/itm/1pcs-HALL-PICK-UP-SENSOR-HME101-compatible-HKZ121-HKZ101-HKZ101E-HKZ101S/264279998707?hash=item3d8850c0f3:g:t7wAAOSwfpVZH9sv). This type of sensor (Hall Effect) is also used on Volvos (p/n 1346792-3) the equivalents of which are HUECO 138152, FACET 8.2722, BREMI 16522, INTERMOTOR 14011 and many other.

I bought one (for spare) by "Vemo" (https://www.ebay.com/itm/Ignition-Pulse-Sensor-Fits-VOLVO-740-760-940-Sedan-Wagon-2-0-2-3L-1984-1993/332083502089?fits=Make%3AVolvo&hash=item4d51b81c09:g:QNgAAOSwwmlcXLna) as I preferred something better than the Chinese knock-offs.