Top End Rebuilds -I'm Confused
10-15-2007, 02:29 PM
#31
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If I ever have to do it I am talking to Geoff/Racetech (I believe that is correct, as I want his input on his experience with the neinmeister stuff) and Ninemeister - I mean, while one is in there, might as well get some power.... or maybe todd knighton and go 3.8 tt...
Hopefully, never. No oil consumption.
Hopefully, never. No oil consumption.
10-15-2007, 03:40 PM
#32
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The shop in question -- Exotech in Plaistow NH -- is run by a guy named Mark Nadler; he has a good reputation locally among the PCA and race crowds, and builds a lot of race motors, he's a racer himself. I think for him changing valve guides is as easy as changing his socks, so it's just time and materials. He uses the phosphorous bronze guides, I believe. But it is basically a one-man show run out of his barn and you have to be patient because there are always a bunch of race motors being torn down at the same time.
All I know is the car has not used a drop of oil in 6000 miles and it runs beautifully now.
All I know is the car has not used a drop of oil in 6000 miles and it runs beautifully now.
10-15-2007, 03:47 PM
#33
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The shop in question -- Exotech in Plaistow NH -- is run by a guy named Mark Nadler; he has a good reputation locally among the PCA and race crowds, and builds a lot of race motors, he's a racer himself. I think for him changing valve guides is as easy as changing his socks, so it's just time and materials. He uses the phosphorous bronze guides, I believe. But it is basically a one-man show run out of his barn and you have to be patient because there are always a bunch of race motors being torn down at the same time.
All I know is the car has not used a drop of oil in 6000 miles and it runs beautifully now.
All I know is the car has not used a drop of oil in 6000 miles and it runs beautifully now.
TIA
10-15-2007, 06:46 PM
#35
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If you search under Mark Nadler you will find posts of mine talking about my great dealings with Mark. Mark did a very long list of work for me called me when it was done ... I hopped on a plane from L.A. picked up the car in N.H and drove 4300 miles home (the car has been perfect for 3 years). If you are looking for a shop that will hold you hand...not the place for you. However when it comes to knowledge of the Porsche kind...he is your man.
10-15-2007, 06:55 PM
#36
If you search under Mark Nadler you will find posts of mine talking about my great dealings with Mark. Mark did a very long list of work for me called me when it was done ... I hopped on a plane from L.A. picked up the car in N.H and drove 4300 miles home (the car has been perfect for 3 years). If you are looking for a shop that will hold you hand...not the place for you. However when it comes to knowledge of the Porsche kind...he is your man.
10-15-2007, 07:11 PM
#37
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Not entirely true. For those who don't browse it, we recently had this discussion on the Turbo forum.
Bad valve guides won't always cause the valve to seat improperly, they just won't guide it properly every time. It is possible to do a leakdown test and have the valve luckily (or unluckily) seat in the proper position, yielding good numbers. However, if the engine was turned over and the leakdown performed again, the numbers would probably be worse as the valve would not seat properly.
In conclusion, bad leakdown numbers can be indicative of shot valve guides but a car with bad guides CAN occasionally seat properly and give okay leakdown numbers. The thread on the turbo forum is here:
https://rennlist.com/forums/993-turbo-forum/383791-lower-valve-cover.html
It was originally about valve covers, but don't worry, it quickly drifted.
Bad valve guides won't always cause the valve to seat improperly, they just won't guide it properly every time. It is possible to do a leakdown test and have the valve luckily (or unluckily) seat in the proper position, yielding good numbers. However, if the engine was turned over and the leakdown performed again, the numbers would probably be worse as the valve would not seat properly.
In conclusion, bad leakdown numbers can be indicative of shot valve guides but a car with bad guides CAN occasionally seat properly and give okay leakdown numbers. The thread on the turbo forum is here:
https://rennlist.com/forums/993-turbo-forum/383791-lower-valve-cover.html
It was originally about valve covers, but don't worry, it quickly drifted.
A leakdown test should always be done, along with measuring the amount of wobble on the valve spring end.
-Jay
10-15-2007, 08:15 PM
#38
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The shop in question -- Exotech in Plaistow NH -- is run by a guy named Mark Nadler; he has a good reputation locally among the PCA and race crowds, and builds a lot of race motors, he's a racer himself. I think for him changing valve guides is as easy as changing his socks, so it's just time and materials. He uses the phosphorous bronze guides, I believe. But it is basically a one-man show run out of his barn and you have to be patient because there are always a bunch of race motors being torn down at the same time.
All I know is the car has not used a drop of oil in 6000 miles and it runs beautifully now.
All I know is the car has not used a drop of oil in 6000 miles and it runs beautifully now.
BTW, see you still dating the same girl, very nice....
10-17-2007, 05:07 PM
#41
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I'm at the go / no go decision for a top end rebuild. I need to pass my inspection and can't with the check engine light (CEL) on. I'm trying to decide between having my independent mechanic do it or the best Porsche dealer mechanic in the area. Any thoughts? Any risks to having an independent guy do the work?
- Scott
- Scott
10-17-2007, 05:24 PM
#42
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I'm at the go / no go decision for a top end rebuild. I need to pass my inspection and can't with the check engine light (CEL) on. I'm trying to decide between having my independent mechanic do it or the best Porsche dealer mechanic in the area. Any thoughts? Any risks to having an independent guy do the work?
- Scott
- Scott
I noticed a bunch of motor specialists in the back of Excellence last night. Please disreagard the Motor Meister ad. Or maybe they're just in Pano....
