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New Owner, Oil, Spare Parts

 
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isuras2  



Joined: 17 Jun 2005
Posts: 458
Location: Phoenix, AZ
PostPosted: Tue Jan 27, 2009 10:54 am    Post subject: New Owner, Oil, Spare Parts Reply with quote
This weekend I became the new owner of a 931. It was Jazzerpet's 931 and it is in great condition. I do need to change the oil and was wondering which is the best weight oil to put in. Does it also use the same oil filter as the 924 NA models? Also, what parts would be good to have as spare parts to have on hand "just in case"? I imagine a fuel pump relay for one.

Thanks,
Rob
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Rob
'80 931 (sold)
'80 924 NA (sold)
Former Omaha Crew
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Paul  



Joined: 02 Nov 2002
Posts: 9491
Location: Southeast Wisconsin
PostPosted: Tue Jan 27, 2009 11:26 am    Post subject: Reply with quote
I run 15w-50 Mobil 1 from Wally World in mine, but it's been hard to find lately.
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ideola  



Joined: 01 Oct 2004
Posts: 15550
Location: Spring Lake MI
PostPosted: Tue Jan 27, 2009 12:13 pm    Post subject: Reply with quote
Paul wrote:
I run 15w-50 Mobil 1

Ditto for all four of my running cars, especially the turbos.

Remind me again, what year is that car?

Spares:
  • Short of a spare relay, a jumper (can be made from two spade terminals and a bit of 16 gauge wire).
  • Alternator belt
  • Water pump
  • Electrical tape (to fix pinhole leaks in rad hoses)
  • Good working used starter from a 944 or 924S
  • Clutch master and slave cylinders
  • Make sure you can open the headlights manually (on one of mine, the knob was messed up on the motor and had to be wound up with a 7mm socket)
  • Full complement of fuses

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isuras2  



Joined: 17 Jun 2005
Posts: 458
Location: Phoenix, AZ
PostPosted: Tue Jan 27, 2009 2:53 pm    Post subject: Reply with quote
The car is a 1980 931. After the engine rebuild, it did not have synthetic oil in it so I am hesitant to use Mobil 1. From what I understand, doing that could cause leaks.

I'm going to start my search for those spares you mentioned. Electrical tape...I can't just use an egg?

Edit: Why a 924S or 944 starter, why not just a 931 starter?

Thanks,
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Rob
'80 931 (sold)
'80 924 NA (sold)
Former Omaha Crew
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ideola  



Joined: 01 Oct 2004
Posts: 15550
Location: Spring Lake MI
PostPosted: Tue Jan 27, 2009 9:10 pm    Post subject: Reply with quote
isuras2 wrote:
The car is a 1980 931. After the engine rebuild, it did not have synthetic oil in it so I am hesitant to use Mobil 1. From what I understand, doing that could cause leaks.

Pure and utter myth. If the engine has been rebuilt and is fully broken in, you will have NO trouble with synth oil. As mentioned, I've been running it in all 4 of my cars (all of them 1980-1981) and have NO leaks.

isuras2 wrote:
Edit: Why a 924S or 944 starter, why not just a 931 starter?

Because a donor 924S/944 starter will likely be newer than what you'll find on donor 931, they are much more plentiful, and they are lighter weight (the casting is slightly smaller but operationally they are identical). The only thing to be aware of is that you might need to change the position of the solenoid. There are three screws that hold it in place, and when I put a 944 starter on my 931 recently, I had to remove the three screws and rotate the solenoid clockwise by one position in order for the 931 starter cables to reach the terminal posts. No big deal.
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isuras2  



Joined: 17 Jun 2005
Posts: 458
Location: Phoenix, AZ
PostPosted: Tue Jan 27, 2009 10:14 pm    Post subject: Reply with quote
ideola wrote:
If the engine has been rebuilt and is fully broken in, you will have NO trouble with synth oil. As mentioned, I've been running it in all 4 of my cars (all of them 1980-1981) and have NO leaks.


I should have said, it has 15k miles on the rebuilt engine. Still should have no leaks?
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'80 931 (sold)
'80 924 NA (sold)
Former Omaha Crew
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ideola  



Joined: 01 Oct 2004
Posts: 15550
Location: Spring Lake MI
PostPosted: Tue Jan 27, 2009 10:33 pm    Post subject: Reply with quote
You should be just fine with synthetic. Your turbo will thank you for it.
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isuras2  



Joined: 17 Jun 2005
Posts: 458
Location: Phoenix, AZ
PostPosted: Wed Jan 28, 2009 11:47 am    Post subject: Reply with quote
Is 15w-40 better than the 0w-40 Mobil 1? Just wondering why to use one rather than the other. Also, does the 931 use the same oil filter as the 924NA?
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'80 931 (sold)
'80 924 NA (sold)
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ideola  



Joined: 01 Oct 2004
Posts: 15550
Location: Spring Lake MI
PostPosted: Wed Jan 28, 2009 11:57 am    Post subject: Reply with quote
The owners manual says 15W-50 for temps down to 5°F, 10W-40 for temps that get lower than that, so it depends on your locality what you use and when. On the cars that I drive year round, I do two oil changes per year (cuz my mileage doesn't warrant any more frequently). I put 10W-40 in during the winter, and 15W-50 during the summer.

Yes, it's the same oil filter.
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isuras2  



Joined: 17 Jun 2005
Posts: 458
Location: Phoenix, AZ
PostPosted: Sat Jan 31, 2009 12:14 pm    Post subject: Reply with quote
What is the oil capacity of the 931? I tried a search and couldn't find it.
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'80 931 (sold)
'80 924 NA (sold)
Former Omaha Crew
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ideola  



Joined: 01 Oct 2004
Posts: 15550
Location: Spring Lake MI
PostPosted: Sat Jan 31, 2009 12:24 pm    Post subject: Reply with quote
5.5 quarts with filter is what the manual says.
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