Can't believe it- broke the timing belt
09-04-2007, 05:22 PM
#16
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why pull the engine? I think the heads are easy enough to get off the car, even though you have the studs like the early engines. I think it might be a whole lot cheaper to just pull that one head and replace those valves. those heads could be off in a few hours. replace the water pump and put on a new belt and you are done. when you pull it, its almost worth rebuilding the sucker! where do you stop.
these cars are bullet proof enough, to where i would fix what is bad.
$1000 to pull the head, $500 to fix the bent valves, $200head gasket , water pump is a good idea, there is $200, so the job is looking at near $2-2.5k.
mk
these cars are bullet proof enough, to where i would fix what is bad.
$1000 to pull the head, $500 to fix the bent valves, $200head gasket , water pump is a good idea, there is $200, so the job is looking at near $2-2.5k.
mk
09-04-2007, 05:22 PM
#17
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If anyone ever takes the pan off their 928, I would always inspect the #2 & #6 rod bearings.
If this is a budget strapped fix I agree 100%. If not, like I said before, the valve guides & seals are gone by 180k (I've seen heads with less than 100k with valve guids worn out). So with this higher mileage, I would rebuild the heads.
09-04-2007, 05:36 PM
#18
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Hi, everyone-
Thanks for all the encouragement. I know, the light should have scared me more the first time, but that really wasn't that much warning!
As for doing it myself- were this two yrs. ago, sure. I think with the help of the board it could be done, despite my not being a master mechanic. Unfortunately this is my last year of med school, and the schedule is packed with both residency interviews and some pretty demanding clinical work. Hell, I've had my supercharger sitting in my garage for a year now because I didn't have time to do the install.... looks like the mechanic will have to do it.
A real shame because, beyond the initial $ spent on preventive work and routine maintainence, the car had been pretty decent in the $ department.
The fellow doing it is very familiar with 928s (Sonny at SM motorsports in New Hyde Park, Queens) and he'll probably have some suggestions- but what else should I have him do/check while he's in there? I appreciate the suggestions already made!
Thanks,
Mark
Thanks for all the encouragement. I know, the light should have scared me more the first time, but that really wasn't that much warning!
As for doing it myself- were this two yrs. ago, sure. I think with the help of the board it could be done, despite my not being a master mechanic. Unfortunately this is my last year of med school, and the schedule is packed with both residency interviews and some pretty demanding clinical work. Hell, I've had my supercharger sitting in my garage for a year now because I didn't have time to do the install.... looks like the mechanic will have to do it.
A real shame because, beyond the initial $ spent on preventive work and routine maintainence, the car had been pretty decent in the $ department.
The fellow doing it is very familiar with 928s (Sonny at SM motorsports in New Hyde Park, Queens) and he'll probably have some suggestions- but what else should I have him do/check while he's in there? I appreciate the suggestions already made!
Thanks,
Mark
09-04-2007, 05:50 PM
#19
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If you have $8k into the repairs, you will then have a car worth about $8k.
If you sell the broken car for $1000, you can buy an S4 for the $9k that you will have. Just something to consider...
The economics are a lot different if you have to pay a mechanic.
If you sell the broken car for $1000, you can buy an S4 for the $9k that you will have. Just something to consider...
The economics are a lot different if you have to pay a mechanic.
09-04-2007, 10:31 PM
#21
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09-04-2007, 10:37 PM
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09-05-2007, 01:03 AM
#23
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You fit a belt to it, set the valve timing correct, then snug it up enough to allow the engine to be rolled by hand through all eight TDC positions. The "leakdown" test in this case isn't too exotic-- It's pretty much a pass/fail test, and your ears can usually do the "grading".
09-05-2007, 10:25 AM
#24
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why pull the engine? I think the heads are easy enough to get off the car, even though you have the studs like the early engines. I think it might be a whole lot cheaper to just pull that one head and replace those valves. those heads could be off in a few hours. replace the water pump and put on a new belt and you are done. when you pull it, its almost worth rebuilding the sucker! where do you stop.
these cars are bullet proof enough, to where i would fix what is bad.
$1000 to pull the head, $500 to fix the bent valves, $200head gasket , water pump is a good idea, there is $200, so the job is looking at near $2-2.5k.
mk
these cars are bullet proof enough, to where i would fix what is bad.
$1000 to pull the head, $500 to fix the bent valves, $200head gasket , water pump is a good idea, there is $200, so the job is looking at near $2-2.5k.
mk
09-05-2007, 11:35 AM
#25
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Hi John,
IIRC it was every 5 years or 60k and then moved it to 7 years or 60k. I am sure someone will chime in and correct me.
I stick with 5 years or 45k miles whichever comes first. Age usually with most of the local 928's.
The high ambient heat takes its toll and why risk a TB break.
Roger
IIRC it was every 5 years or 60k and then moved it to 7 years or 60k. I am sure someone will chime in and correct me.
I stick with 5 years or 45k miles whichever comes first. Age usually with most of the local 928's.
The high ambient heat takes its toll and why risk a TB break.
Roger
__________________
Does it have the "Do It Yourself" manual transmission, or the superior "Fully Equipped by Porsche" Automatic Transmission?
George Layton March 2014
928 Owners are ".....a secret sect of quietly assured Porsche pragmatists who in near anonymity appreciate the prodigious, easy going prowess of the 928."
Does it have the "Do It Yourself" manual transmission, or the superior "Fully Equipped by Porsche" Automatic Transmission?
George Layton March 2014928 Owners are ".....a secret sect of quietly assured Porsche pragmatists who in near anonymity appreciate the prodigious, easy going prowess of the 928."
09-05-2007, 12:50 PM
#26
928 Engine Re-Re-Rebuild Specialist
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I treated the task as therapy. I took my time (9 months the first time, 13 the second
) and worked on it whenever I had free time and there wasn't anything good on TV. On my 2nd job, I think it only took me about 30-40 hours total, but I only swapped heads rather than rebuilding them. If it weren't for the little problems that popped up along the way (busted bolts, slipping cam gear) it would have taken about 10 hours less.Whatever you decide, good luck!
09-05-2007, 01:40 PM
#27
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Imo000 says it can be done with the engine in the car, but that it's not easy. He shortened one of the head studs to make future removals easier. I had a hard enough time removing the passenger side cam cover (because of clearance issues on the bottoms side of the cover). I opted to pull the engine to get at the heads. Having done it twice now, I don't think it's all that difficult. Messy, but not difficult.
I treated the task as therapy. I took my time (9 months the first time, 13 the second ) and worked on it whenever I had free time and there wasn't anything good on TV. On my 2nd job, I think it only took me about 30-40 hours total, but I only swapped heads rather than rebuilding them. If it weren't for the little problems that popped up along the way (busted bolts, slipping cam gear) it would have taken about 10 hours less.
Whatever you decide, good luck!
I treated the task as therapy. I took my time (9 months the first time, 13 the second
) and worked on it whenever I had free time and there wasn't anything good on TV. On my 2nd job, I think it only took me about 30-40 hours total, but I only swapped heads rather than rebuilding them. If it weren't for the little problems that popped up along the way (busted bolts, slipping cam gear) it would have taken about 10 hours less.Whatever you decide, good luck!
It’s not easy but not too difficult either and much less work that pulling the engine out. Haven’t had too much time to work on mine this year but as soon as I have the heads off again, I’ll post pics to prove it. The motor mounts on mine were fairly good cause the engine still rocks when I blip the throttle, so it wasn’t from the extra clearance of collapsed MMs.
09-05-2007, 02:10 PM
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I just did it. The only thing that made it worse and more time consuming was all the "while I'm in there's". I was able to have both cam covers and heads off in a day. It will save you serious money if you take them to the shop seperately and they don't have to do it.
09-05-2007, 02:28 PM
#29
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Hi John,
IIRC it was every 5 years or 60k and then moved it to 7 years or 60k. I am sure someone will chime in and correct me.
I stick with 5 years or 45k miles whichever comes first. Age usually with most of the local 928's.
The high ambient heat takes its toll and why risk a TB break.
Roger
IIRC it was every 5 years or 60k and then moved it to 7 years or 60k. I am sure someone will chime in and correct me.
I stick with 5 years or 45k miles whichever comes first. Age usually with most of the local 928's.
The high ambient heat takes its toll and why risk a TB break.
Roger
09-05-2007, 03:22 PM
#30
Nordschleife Master
Chewy, the car in question is an early 32 valve and is a completely different story for removing the heads in the car. I wouldnt even bother with how easy it is to pull the engine.