I have my cam cover off of my car. Noticed that the heater supply and return hoses are now very accessible. Since I have the relatively easier access to them, should I go ahead an proactively replace them? (I have a '88, with only 64k miles). Thanks.

 

I would! I'd replace everything I could get my hands on and that my bank account would allow me to. The heater hoses, the heater valve, the reference sensors, simply anything that's in reach.

 

I would if you can afford it. Mileage doesn't matter as much as age in this case. Having a coolant hose burst will strand you at best and can lead to severe engine damage if you don't notice right away.

 

Thanks. Which reference sensor sensors?

 

Pretty good write up on Clarks:

http://www.clarks-garage.com/shop-manual/ign-02.htm

Several options for replacement including Bosch and FAE.

 

Definitely get that heater valve out of there. I had my intake manifold and fuel rail off the car for 3 weeks and right after I reassembled it my heater valve started to go! I really wish I had done it when it was accessible.

I got the all metal replacement HCV from an Audi 80 so that I don't have to deal with the plastic Porsche part only $5 instead of $45, as well. I would do it now.

 

Is there an all-metal substitute for the early cars (cable operated)?

 

http://forums.pelicanparts.com/porsc...whos-done.html