Just joined the Top End Rebuild club
#16
Guru
Lifetime Rennlist
Member
Rennlist Small
Business Sponsor
Lifetime Rennlist
Member
Rennlist Small
Business Sponsor
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Originally Posted by 2ndof2
"Stickem Up!!!" (hijak)
So how exactly does one decide to do a top-end rebuild or not if oil consumption is within specs but the "wiggle test" suggests valve guide wear? The error codes for SAI on my car shows one bank is clogged and registration with smog cert required is due in a few weeks for me. Clutch is doing fine and everything is running well....any reason why should I (or anyone else) should pay $5K+ at this point? I think not!
So how exactly does one decide to do a top-end rebuild or not if oil consumption is within specs but the "wiggle test" suggests valve guide wear? The error codes for SAI on my car shows one bank is clogged and registration with smog cert required is due in a few weeks for me. Clutch is doing fine and everything is running well....any reason why should I (or anyone else) should pay $5K+ at this point? I think not!
For the money involved in top end work (which can often lead to bottom end and other while we are there work), valve springs can be removed to enable a higher quality valve guide assessment, without much disassembly.
In a nutshell, I wouldnt necessarily do a top end just based upon someone wiggling my valves-- <<<<wow, that doesnt sound right?
#17
Instructor
Join Date: Jan 2002
Location: Savannah, GA
Posts: 112
Likes: 0
Received 0 Likes
on
0 Posts
![Question](https://rennlist.com/forums/images/icons/icon5.gif)
There has been some discussion in past issues of Pano of additional value for resale of 993's if top end work has been performed for SAI/CEL issues, valve guide replacement, etc. I am interested in the opinion of other members re how much $, if any, you feel appropriate for such repairs when offering the car for resale.
#18
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Originally Posted by Burt Goodwin
There has been some discussion in past issues of Pano of additional value for resale of 993's if top end work has been performed for SAI/CEL issues, valve guide replacement, etc. I am interested in the opinion of other members re how much $, if any, you feel appropriate for such repairs when offering the car for resale.
btw, devek's quote of $5k is pretty good. i payed closer to $6k when i had mine done at another local shop in the same area.
#19
Rennlist Member
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Originally Posted by Burt Goodwin
There has been some discussion in past issues of Pano of additional value for resale of 993's if top end work has been performed for SAI/CEL issues, valve guide replacement, etc. I am interested in the opinion of other members re how much $, if any, you feel appropriate for such repairs when offering the car for resale.
#20
Addict
Lifetime Rennlist
Member
Lifetime Rennlist
Member
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
First of all, welcome to the Top End Rebuild Club!! We're getting more members all the time!!
Second, here is a link to what I considered (and mostly did) in my rebuild:
https://rennlist.com/forums/993-forum/160349-valve-guide-replacement-and-iwhile-your-at-itn-repairs.html
Second, here is a link to what I considered (and mostly did) in my rebuild:
https://rennlist.com/forums/993-forum/160349-valve-guide-replacement-and-iwhile-your-at-itn-repairs.html
#22
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
so the thought of the SAI issues has lead me so prepared that every time I turn the key, I am expecting the light to come on. So my question is reguarding a DIY. I am a qualified technitian for just about any job, I have a lot of experience with restoring 60's musche cars, did every conceivable job on my 968 from lifting the motor to a clutch and in between. But I have never torn down a 911 engine in my life, only know theory on the car, and dont likely have access to a lift, so is this a job reasonable for me to tackle DIY? anybody here done it?
#24
Three Wheelin'
Join Date: May 2005
Location: Orange County, So Cal
Posts: 1,367
Likes: 0
Received 3 Likes
on
3 Posts
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Originally Posted by delanobe
Does somebody know what the break in period is after a full engine rebuild? ( valves, guides, cilinders, crank shaft etc...?
Thanks
Thanks
#25
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Is there an intermediate shaft bearing issue w/ the NA's?
Beware the slippery slope. I ended up splitting the case to be certain but new jugs, flame rings, carillos, cams- all the 'good mods' jacked up the price a LOT.
Beware the slippery slope. I ended up splitting the case to be certain but new jugs, flame rings, carillos, cams- all the 'good mods' jacked up the price a LOT.
#26
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Originally Posted by delanobe
Does somebody know what the break in period is after a full engine rebuild? ( valves, guides, cilinders, crank shaft etc...?
The service advisor recommended a break-in period of ideally 3,000 to 4,000 km (about 1,800 to 2,500 miles) during which there should be "no aggressive driving" and the engine should not be taken over 3,000 to 4,000 rpm, to allow the valves to bed in nicely.
#27
Addict
Lifetime Rennlist
Member
Lifetime Rennlist
Member
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
A 993 engine rebuild is entirely within the scope of a good home mechanic (gee, how would I know that?).
You will be needing a good machine shop that can do the guides and any machining that you need.
The quick way is to strip the engine down to the heads off and do the guides and work you way back up with all new seals/gaskets.
The slower way is to split the case and check everything. I doubt if you will have any wear hardly at all except for the lay shaft...on my car with 75,000 miles the lay shaft bearings were showing some wear. This is normal for a 993 apparently. The main bearings were hardly worn. Rings and piston specs were excellent. Wrist pin bushings has some minor wear. Piston barrels had zero wear and had the original scoring marks. I did have some oil leaks between the barrels and the case so I would have gone that far tio cure those so at the end I went all the way I don't regret it.
You actually don't have loads of money doing it yourself...you need a proper engine stand (which for the 911 is expensive), some special tools and lots of time. If you time is free then its cheaper. There is the bragg'n factor as well.
Here are my posts for your reading pleasure on my adventure into the bowels of my engine.....I am glad I did it but I am not ready to repeat this process for a while...its quite intense and it takes lots and lots of time...
Part 1 - Part I
https://rennlist.com/forums/993-forum/246553-diy-engine-rebuild-part-1-a.html
Part 2 - Cams and TIming
https://rennlist.com/forums/993-forum/246763-engine-rebuild-part-ii-cams-and-timing.html
Part 3 - Heads and SAI Passages
https://rennlist.com/forums/993-forum/246767-engine-rebuilt-part-iii-heads-and-sai-passages.html
Part 4 - The saga of the valve guides - and Carbon
https://rennlist.com/forums/993-forum/247279-engine-rebuild-part-iv-the-saga-of-the-valve-guides-and-carbon.html
Part 5 - Into the Depths
https://rennlist.com/forums/993-forum/247992-diy-engine-rebuild-part-v-into-the-depths.html
Part 6 - Exploring the SAI Passages
https://rennlist.com/forums/993-forum/249641-diy-engine-rebuild-part-vi-6-exploring-the-sai-passages.html
Part 7 - Cleaning, Cleaning, Cleaning..
https://rennlist.com/forums/993-forum/252373-diy-engine-rebuild-part-vii-7-cleaning-cleaning-cleaning-cleaning.html
Part 8 - Rods and last minute checks before glue ; - )
https://rennlist.com/forums/993-forum/254718-diy-engine-rebuild-part-viii-8-rods-and-last-minute-checks-before-glue.html
Part 9 - Sealing the tomb...
https://rennlist.com/forums/993-forum/256730-diy-engine-rebuild-part-ix-9-sealing-the-tomb.html
Part 10 - Piston's a puimping
https://rennlist.com/forums/993-forum/261227-diy-engine-rebuild-part-x-10-piston-s-a-pumping.html
Part 11 - Its all in the timing eh!
https://rennlist.com/forums/993-forum/262993-diy-engine-rebuild-part-xi-11-its-all-in-the-timing-eh.html
Part 12 - Messing up the looks of a clean engine..
https://rennlist.com/forums/993-forum/263215-diy-engine-rebuild-part-xii-12-messing-up-the-looks-of-a-clean-engine.html
Part 13- It would be part 13 eh?
https://rennlist.com/forums/993-forum/264001-diy-engine-rebuild-part-xiii-13-it-would-be-part-13-eh.html
Part 14 - Holy Crap!
https://rennlist.com/forums/993-forum/264329-diy-engine-rebuild-part-xiv-14-holy-crap.html
Cheers,
Mike
You will be needing a good machine shop that can do the guides and any machining that you need.
The quick way is to strip the engine down to the heads off and do the guides and work you way back up with all new seals/gaskets.
The slower way is to split the case and check everything. I doubt if you will have any wear hardly at all except for the lay shaft...on my car with 75,000 miles the lay shaft bearings were showing some wear. This is normal for a 993 apparently. The main bearings were hardly worn. Rings and piston specs were excellent. Wrist pin bushings has some minor wear. Piston barrels had zero wear and had the original scoring marks. I did have some oil leaks between the barrels and the case so I would have gone that far tio cure those so at the end I went all the way I don't regret it.
You actually don't have loads of money doing it yourself...you need a proper engine stand (which for the 911 is expensive), some special tools and lots of time. If you time is free then its cheaper. There is the bragg'n factor as well.
Here are my posts for your reading pleasure on my adventure into the bowels of my engine.....I am glad I did it but I am not ready to repeat this process for a while...its quite intense and it takes lots and lots of time...
Part 1 - Part I
https://rennlist.com/forums/993-forum/246553-diy-engine-rebuild-part-1-a.html
Part 2 - Cams and TIming
https://rennlist.com/forums/993-forum/246763-engine-rebuild-part-ii-cams-and-timing.html
Part 3 - Heads and SAI Passages
https://rennlist.com/forums/993-forum/246767-engine-rebuilt-part-iii-heads-and-sai-passages.html
Part 4 - The saga of the valve guides - and Carbon
https://rennlist.com/forums/993-forum/247279-engine-rebuild-part-iv-the-saga-of-the-valve-guides-and-carbon.html
Part 5 - Into the Depths
https://rennlist.com/forums/993-forum/247992-diy-engine-rebuild-part-v-into-the-depths.html
Part 6 - Exploring the SAI Passages
https://rennlist.com/forums/993-forum/249641-diy-engine-rebuild-part-vi-6-exploring-the-sai-passages.html
Part 7 - Cleaning, Cleaning, Cleaning..
https://rennlist.com/forums/993-forum/252373-diy-engine-rebuild-part-vii-7-cleaning-cleaning-cleaning-cleaning.html
Part 8 - Rods and last minute checks before glue ; - )
https://rennlist.com/forums/993-forum/254718-diy-engine-rebuild-part-viii-8-rods-and-last-minute-checks-before-glue.html
Part 9 - Sealing the tomb...
https://rennlist.com/forums/993-forum/256730-diy-engine-rebuild-part-ix-9-sealing-the-tomb.html
Part 10 - Piston's a puimping
https://rennlist.com/forums/993-forum/261227-diy-engine-rebuild-part-x-10-piston-s-a-pumping.html
Part 11 - Its all in the timing eh!
https://rennlist.com/forums/993-forum/262993-diy-engine-rebuild-part-xi-11-its-all-in-the-timing-eh.html
Part 12 - Messing up the looks of a clean engine..
https://rennlist.com/forums/993-forum/263215-diy-engine-rebuild-part-xii-12-messing-up-the-looks-of-a-clean-engine.html
Part 13- It would be part 13 eh?
https://rennlist.com/forums/993-forum/264001-diy-engine-rebuild-part-xiii-13-it-would-be-part-13-eh.html
Part 14 - Holy Crap!
https://rennlist.com/forums/993-forum/264329-diy-engine-rebuild-part-xiv-14-holy-crap.html
Cheers,
Mike
#28
Addict
Lifetime Rennlist
Member
Lifetime Rennlist
Member
Join Date: Jan 2004
Location: Mount Prospect, IL
Posts: 4,495
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
WOW!! I just looked through that whole DIY series.. (took me almost 3 hours) and it was darn educational! I'm no mechanic but it sure as heck was facinating to see all that!
I can't believe I missed out on seeing that before! WOW! Excellent to see here on rennlist!!!!!
I can't believe I missed out on seeing that before! WOW! Excellent to see here on rennlist!!!!!
#29
Addict
Lifetime Rennlist
Member
Lifetime Rennlist
Member
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Thanks Chris!
It was a lot of work but it was pretty fun too...and the list was VERY supportive with lots of good comments. The car seems to run well now but I only have about 500 miles on the engine...so far so good. Not broken in until 1000 miles.
Cheers,
Mike
It was a lot of work but it was pretty fun too...and the list was VERY supportive with lots of good comments. The car seems to run well now but I only have about 500 miles on the engine...so far so good. Not broken in until 1000 miles.
Cheers,
Mike