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SpeedDemon · Posted: Thu Jun 10, 2004 10:12 am Post subject: Bad News

I just got the news back from the mechanic on my little problem here. It turns out that there is only 30 psi compression in two of the cylinders. So I say NOW WHAT. Hes tells me to send the engine to edmonton and get it re done should be 3 - 5 thousand bucks hee yaw i only paid 6 for it. so i need some advice people cuz i love that car. and i dont have 5 grand to fix it. Let me know what you think .
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"Never take ecstasy, beer, baccardi, weed, pepto bismol, vivarin, tums, tagamet hb, xanax, and valium in the same day. It makes it difficult to sleep at night." ---Eminem.

1977½ 924

my77porsche · Joined: 09 Jun 2004 Posts: 63 Location: Stonington, CT

the best thing i can tell you is befriend a mechanic and have him do it for you fo cheap, thats what i do.

Also, there are a ton of 924's for sale all over this board, ranging from 500-2500 dollars. If you can, get a cheap one and do an engine overhaul, otherwise the only other option is rebuild it your self. 3-5 grands sounds like way too much to have you engine rebuilt, you should be able to get it rebuilt for like 1000. Look around
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looking for a great one......

Joes924Racer · Posted: Thu Jun 10, 2004 10:56 am Post subject:

K..let me guess is it a 924S must be for the amount of cash
your talkin first thing to know is what it is a 924 or a 924S.
To narrow the cost down.
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1979 porsche 924 Na
1980 porsche Turbo 931GT Replica
Have u ever driven a turbo.

1982Porsche924 · Joined: 14 Nov 2002 Posts: 679 Location: Cupertino, CA

It costs $1000 in parts to rebuild an engine (with new clutch). Add machine work and labor, 3-5k doesn't sound rediculous. For 3-5k you can get yourself another 924, in very good condition. I recommend that you keep this 924, and maybe buy an assembled engine from a fairly low mileage car. It should prove to be cheaper as you can swap an engine in about 4-5 hrs.
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1979 Porsche 924 "S"
Engine: Euro pistons, Light Flywheel, Weber TB, Bursch Header, Cam Wheel
Suspension: Front coil-overs, adj sways, Solid bush. Thicker tors. bars, 5-bolt, BBS rims
Body: Fiberglass widebody kit, 931 Nose

Joes924Racer · Posted: Thu Jun 10, 2004 11:01 am Post subject:

If its a 924 you can do it for 700.00.
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1979 porsche 924 Na
1980 porsche Turbo 931GT Replica
Have u ever driven a turbo.

924guy · Posted: Thu Jun 10, 2004 11:33 am Post subject:

the 3-5k definatly sounds like a 2.5l 924S/944 engine rebuild to me...way too much for a 2 liter, which is much easier to rebuild .. id try and get a second quote...if its still a "ohmygod" dollar amount after that , do it yourself or find a good running used engine to swap with....
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Eric
78 924
82 931 SE "smokey"
99' VehiCross
Y2K Honda Insight
http://www.cardomain.com/id/924Guy
Performance by Pasha

Paul · Posted: Thu Jun 10, 2004 12:57 pm Post subject:

It might be just a head gasket or a couple of burnt valves. Did they do a blow down test to determine where the motor is leaking compression?

Khal · Posted: Thu Jun 10, 2004 1:09 pm Post subject:

In a previous post you mentioned it was running when the problem occured, and the problem caused it to "sound different"? Is the car running now? If it'll start and run then it's unlikely, IMHO, that it needs a complete re-build. Of course, running the engine for extended periods with a blown head gasket can warp the head and cause other damage. But again, if it's still running...

I agree with Paul. It could be just a blown head gasket, which can cause the engine to sound different and will definitely cause the engine to lose power. Should only cost a couple of hundred bucks to replace the head gasket - assuming you get a mechanic to do it for you. Do it yourself and it won't cost you much at all, assuming you have the right tools.

But then, if the mechanic's any good, has done the relevant tests and still says it needs a re-build, well, it's gonna cost ya... But 3-5K in US bucks does sound excessive! Mate, she'd wanna be ALL NEW inside'n out for that sorta money!

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'80 924 Turbo

SpeedDemon · Posted: Thu Jun 10, 2004 1:13 pm Post subject:

First its a 1977 924, I dont belive they did a blow down test to determine where the leak was just the compression test. I would like to hear more about this $700.00 fix joes talkin about. Other than that a grand isnt to bad, I do know a mechanic in town here so I will talk to him tomorrow. thanks guys i will let you know how it goes.
_________________
"Never take ecstasy, beer, baccardi, weed, pepto bismol, vivarin, tums, tagamet hb, xanax, and valium in the same day. It makes it difficult to sleep at night." ---Eminem.

1977½ 924

Sleykin · Posted: Thu Jun 10, 2004 1:34 pm Post subject:

If it is 2 adjacent cylinders it is most likely a headgasket. Could be a cracked head or block. A wet compression test would ruel out valves but you will have to pull the head to be sure what is going on. My only need some gaskets and perhaps a head shaved to clean it up.
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Glenn Neff
Medford, OR
87' 924S

Paul · Posted: Thu Jun 10, 2004 1:49 pm Post subject:

77 924s had head gaskets problems from the start. I bought a new one in 77, and didn't even make it home from the dealer.

Joes924Racer · Posted: Thu Jun 10, 2004 1:56 pm Post subject:

Worn rings worn motor
you take it apart plan on getting
new piston rings, like deves rings
then new bearings for the mains
thats on the crankshaft new rod bearings,
A complete gasket set. Then if you want
take the head aprt and give it a valve job
replacing the guides though I think with new rings
and bearings no real machine work just a deep cleaning
not even a hone job on the cyl. walls and you would be good to go
shoot you might even be abkle to get the cost down to 5 or 6 hundred.
This is for all the parts. The cost of a mechanic is something your gonna
have to find yourself. A77 na those motors are pretty easy to rebuild.
the people you talked to either didnt know what you had or were gonna rip
you one. A rebuild for that kind of money could get you almost a stage 2
super motor from one of the reputable builders here in the states.
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1979 porsche 924 Na
1980 porsche Turbo 931GT Replica
Have u ever driven a turbo.

924RACR · Posted: Thu Jun 10, 2004 10:22 pm Post subject:

Yeah, that's a stupid amount of money for a rebuild. For that money, well, I've got about $3kUSD into my full-race-prep motor, including all the machining (extensive - overbore, balance, etc) and new pistons (not usually needed in an NA rebuild). To just put in new rings and bearings, you're talking about $400USD in parts unless there are damaged parts.

But even more to the point, yes, look at headgasket and other sources of lost compression first. Needs more investigation.
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Vaughan Scott
Webmeister
'79 924 #77 SCCA H Prod racecar
'82 931 Plat. Silver
#25 Hidari Firefly P2 sports prototype

emoore924 · Joined: 13 Apr 2004 Posts: 2822

It sounds like head gasket to me. If you are mechanically inclined, you could DIY. You would need a turbo headgasket set (the turbo has better water flow, $50-100 ebay), and have the head decked if it needs it (something like $50-100 in nost machine shops), and 8-12 hours of your labor, having never done it before ($0-n depending on how you value your time), toss in a few misc items here and there, and you could probably do it yourself in a weekend for < $500. Have done so (several times) myself, so it can be done. YMMV.

Joes924Racer · Posted: Fri Jun 11, 2004 4:40 am Post subject:

I concur head gasket sounds like the culprit.. Price
for head gasket 25.00 bucks tops.

There probly nothin the cyl. head needs done to it so
you unhook everthing from the cyl. head loosen the cyl.
bolts in a special order so you dont warp the cyl. head.

Once off you clean the tops of the pistons. Place the new
gasket right side up and tighten the cyl. head in its special
order. Put everthing back on. You can do it if you
try well all on the board helpyou with it.

You gotta be strong enough to lift off the cyl. head though.
First thing youll need is a few tools and a torque wrench
& breaker bar.

Keep us informed this board offers almost hands on
help on 924 issues.
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1979 porsche 924 Na
1980 porsche Turbo 931GT Replica
Have u ever driven a turbo.