924Board.org

jesse wall · Joined: 09 Nov 2002 Posts: 284 Location: blanch nc

What is life of 924 engine? What are the most miles you know of without rebuild? What is life with rebuilds like rod bearings and rings ? Thanks just wondering as I keep hearing about engines being taken down and what great shape they are in, , curious Jesse
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jesse wall 'new driver' , 87 924s

Rasta Monsta · Joined: 12 Jul 2006 Posts: 11733 Location: PacNW

I have read on these forums about 100k engines being disassembled and still showing cross-hatching marks in the bores, so it would seem the bottom end does very well. . .however I don't think you can get away with putting off headwork for much beyond that.
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Toofah King Bad

WeiBe (1987 924S 2.5t) - 931 S3

-nick · Joined: 16 Nov 2002 Posts: 2699 Location: Cambridge, MA

^ sounds about right. The bottom end is for diesel abuse after all.

Headgaskets and valve guides / stem seals seem to need replacing north of 100k miles. Although, a lot of these cars have been abused with oil changes / overheating / etc. Leaky gaskets aren't uncommon on the oil pan, which is somewhat of a pain.
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1980 931S
15psi boost, MS-II, EDIS, 951 IC, custom intake, Ford 5.0L throttle body, Forge BOV, WB o2, G31 w/LSD, 964 wheels, 968 rear sway, Bilsteins, 200# Welt. springs. A laptop, and a partridge in a pear tree.
1991 964 C4 Cabriolet

Andrew NZ · Joined: 22 Jun 2004 Posts: 744 Location: New Zealand

Mine had done about 300,000km's before I finally seized it by over heating it in a rally. When it cooled down I topped up the oil and water and finished the rally (another 500km's) before I stripped it down and found the original honing marks in the block. I have most of the service records from new and it doesn't look like it had ever been rebuilt before!

These things are bullet proof!
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Andrew
1977 RX924 race car
12a bridgeport supercharged
www.race4-dcup.co.nz

Andrew NZ · Joined: 22 Jun 2004 Posts: 744 Location: New Zealand

I forgot to mention that they were standard size bearings and rings that came out........and standard size that went back in!!!
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Andrew
1977 RX924 race car
12a bridgeport supercharged
www.race4-dcup.co.nz

jesse wall · Joined: 09 Nov 2002 Posts: 284 Location: blanch nc

wow!! What a neat thing to hear , thanks Jesse
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jesse wall 'new driver' , 87 924s

StienbargerR · Joined: 28 Oct 2005 Posts: 1362 Location: Richmond, IN

yeah. my car has 180,000, and i runs ok, except i burns oil pretty bad.

ryan
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1978 924 NA
-250lb lowering springs, Euro Pistons

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

My wifes '83 924 has 300 000+ kms on it and no rebuilds plus I turbocharged it few days ago.
Check Performance upgrades forum, there's topic about it.
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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

'84 924, turbocharged, sold.
http://www.facebook.com/vemsporsche

924RACR · Posted: Mon Mar 26, 2007 8:21 am Post subject:

Yeah, I've found the 2-liters to be pretty robust down low, hard to kill except through neglect... though I've seen my share of those!
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Vaughan Scott
Webmeister
'79 924 #77 SCCA H Prod racecar
'82 931 Plat. Silver
#25 Hidari Firefly P2 sports prototype

5150 · Posted: Mon Mar 26, 2007 8:08 pm Post subject:

Well, the odometer on my 1978 hasn't worked since the late 1990's, but looking through the history folder and service receipts I know the car cleared 200k miles by the time I bought her. I had a piston ring break a couple of years in so I'd say it was around the 250k mark that we changed the engine to a reconditioned one.
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Mars Red '78 Euro 924 n/a
http://www.cardomain.com/id/5150_uk

Graphite? Grey Metallic '85 (late model) 944 2.5

There are two kinds of pedestrians: the quick and the dead.

geddes66 · Joined: 10 May 2003 Posts: 129 Location: Bakersfield CA

The crosshatching still shows on my sons '77, built Sep '76. The oil pressure is too high cold (7.5-8.5 bar) and too low hot (2.5) but replacing the filter with a short one and wrapping it in foil helped, (headers heating oil through filter via radiant heat?) an oil cooler is on the to do list.

I am running 5W-50 synthetic oil. I think the relief valve is stuck closed but haven't tried to remove it yet.
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The Porsche is now my son's, my car is cooler, slower but cooler.