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mustangporsche · Joined: 08 Oct 2003 Posts: 283 Location: California Lodi

Ok this if for those of you who have rebuilt your 931 engine. Is the 931 engine very difficult to rebuild. I am just wondering, because I am thinking mine is going to need to before long, its making lifter noise and some other strange noises, off and on. I am just not sure about this engine? I have built a few ford v8s and a 4 cyl eagle talon turbo. But I don’t really know too much about these engines? Anyone care to comment? What was your rebuild cost, are parts crazy just because it’s a Porsche? Thanks heath

Lizard · Posted: Wed Mar 02, 2005 4:00 pm Post subject:

you can have it rebuilt for about $500 (roughly) if you do ALL the work yourself,

however before rebuild, do a compression test and a leakdown test on a warm engine,
also check/adjust the lifters as nessecary
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mustangporsche · Joined: 08 Oct 2003 Posts: 283 Location: California Lodi

Wow 500 that’s really cheep, I was expecting 5000 ha-ha, I just spent 1200 on my ford v8 doing all the work my self. Yes I need to do a leak down test, but I don’t have one, I need to find a good one. What are good leak down rates for these engines? Do these engines have hydraulic lifters or solid?

Raceboy · Joined: 01 Mar 2004 Posts: 2327 Location: Estonia, Europe

These cars have solid lifters, adjustable with Allen key.
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'83 924 2.6 16v Turbo, 470hp
'67 911 2.4S hotrod
'90 944 S2 Cabriolet
'78 924 Carrera GT replica
'84 928 S, sold
'91 944 S2, sold
'82 924S/931 "Gulf", sold

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CMXXXI · Joined: 05 Nov 2002 Posts: 1939 Location: Vicksburg, MS

Mustang,

Here's a fairly comprehensive list of parts needed for a rebuild. Prices I paid can be found in this more inclusive list and should give you a good idea of what you are up against. I'd guess that I got %90 or more of my parts on-line or off of eBay.
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'79 Eurospec 931

mustangporsche · Joined: 08 Oct 2003 Posts: 283 Location: California Lodi

ok thanks a lot, thats a big help

Lizard · Posted: Thu Mar 03, 2005 1:54 pm Post subject:

that is for the engine only, the turbo rebuild is not included,

I got a leakage tester where you put the cyl to TDC then it pushes air into the cyl upto 150PSI and it tells you how much is leaking and has a worn guage telling you if it is good or bad it cost me I think about $49 cdn but I could be wrong
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3 928s,

mustangporsche · Joined: 08 Oct 2003 Posts: 283 Location: California Lodi

oh yeah that sounds pretty good, i u dont mind, where did you get that tester??