Apogee Posted 21September, 2016 Report Share Posted 21September, 2016 Great work - you must feel a million bucks once it was finished - a great feeling of accomplishment. I wish I had the skills. Link to comment Share on other sites More sharing options...
Peter M Posted 21September, 2016 Report Share Posted 21September, 2016 GuysThanks for the numerous responses. I apologise for my part in turning this engine rebuild story into another oil thread! I was just expecting a couple of oil product names.Just a comment though: I would not consider Valvoline Maxlife 20w-50 to be a "last century" oil as the current type on sale is a synthetic blend, meets the current API classification of SN and ACEA spec A3/B4 and contains a reduced zinc content of only 840ppm. Very much a modern oil suitable for this century emission equipped cars that typically have low friction valve trains that happen to have run high mileages.I understand that the previous API classification SL blend had the higher ZDDP many owners seek. Link to comment Share on other sites More sharing options...
Peter M Posted 21September, 2016 Report Share Posted 21September, 2016 does it get full throttle?Ah the old hose clamp fouling the throttle bell crank trick! Only took me 18 hours to catch up to you Jnr............ Link to comment Share on other sites More sharing options...
Buchanan Automotive Posted 21September, 2016 Author Report Share Posted 21September, 2016 Hi Warren , in regards to the M96/ 97 , there is so much engine destruction info out there ( public forums ) that's its quite overwhelming , I think that sums up the M96/97 & this ( air cooled 911 ) section of this forum is not the place to go into detailsRegardsBruce Buchanan-------------------------------------------------------------------------------------------------------------------------------- does it get full throttle? I just saw you're post , do you mean does this engine get full throttle ? , or do you mean does this engine experience full throttle driving by the owner over the last 31 years of city /suburban / bumper to bumper driving in thick traffic in Sydney ?RegardsBruce Buchanan Link to comment Share on other sites More sharing options...
Coastr Posted 21September, 2016 Report Share Posted 21September, 2016 As a technical question, how do you measure wear in the cam chain sprockets? Link to comment Share on other sites More sharing options...
jnr356 Posted 22September, 2016 Report Share Posted 22September, 2016 I just saw you're post , do you mean does this engine get full throttle ? , or do you mean does this engine experience full throttle driving by the owner over the last 31 years of city /suburban / bumper to bumper driving in thick traffic in Sydney ?RegardsBruce Buchanan clamp on butterfly housing boot Link to comment Share on other sites More sharing options...
Buchanan Automotive Posted 22September, 2016 Author Report Share Posted 22September, 2016 As a technical question, how do you measure wear in the cam chain sprockets?Its quite easy when you keep new ones in stock as we do + after 10 years working on Porsche engines one gets very used to just taking one glance at a chain sprocket & instantly recognising something is not quite right , after 20 years its gets even easier , at 40 years its a no brainer That said , there are measurements ( comparing new ones ) to old ones , first of all there is the }A ) Whats known as the caliper diameter , meaning the exact distance across the sprocket from base ( curved base ) to opposite side , comparing new with oldB ) Pitch circle diameter , again comparing measurements with new to old C ) outside diameter , point to point across sprocket , again using the new sprocket as the base measurement / guideThe chain sprockets = 901 105 546 02 /04 ( new ) are worth keeping in stock just for measurement purposes alone if in doubt , plus we sell enough for the poor 911 engines that have suffered the human inspired wrong oil syndrome But the most important things one notices ( at a glance ) is the very very obvious excess wear of one side of the individual teeth ( where the chain rollers have not been insulated by the oil well enough and metal to metal contact has allowed uneven wear to occur ) , just like on a dirt bike front chain sprocket Then there is the tiny pitting leading up to the point of the sprocket teeth , it may be small , but its a dead giveaway of excessive metal to metal severe contact , again the oil has not been the protective bearing( barrier) between the two metal surfaces, dead giveaway that the poor thing has/had been on a low viscosity low oil film strength so called synthetic engine oil Then there is the ( not that uncommon ) 911 chain sprockets not aligned correctly ( incorrect shimming ) and one will see the chain wearing into one side of the sprocket teeth , thats just incorrect alignment & nothing to do with oil RegardsBruce Buchanan Link to comment Share on other sites More sharing options...
Coastr Posted 23September, 2016 Report Share Posted 23September, 2016 Great answer thanks. Chain sprockets are easily inspected with cam covers off. I guess wear on them might give an indication of wear levels deeper in the engine. Thats how they were new , all the bright metal work , meaning all the mild steel parts, brackets, pipes , nuts , bolts , washers etc (that were not painted ) that were on Porsche's , Merc's & BMW's etc in the 1960's , 1970's 1980's & into the early 1990's were finished in "Yellow Chromate "( Hexavalent Chromate ) , that process is no longer done as its illegal ( the process) because its Toxic , so the closest we can get done is yellow / gold zinc plating , looks just the same For the last 20 or so years , all we get on new Porsche cars is the dull " Grey " zinc finish ( looks dreadful ) on nuts & bolts & metal brackets The original ( 31 year old ) exhaust system was interesting , Sean spent hours on the separate components , bead blasting with some interesting mediums in our own bead blasting tank and hand polishing the rear muffler with special pneumatic tools / pads & hand finishing RegardsBruce BuchananBuchanan Automotiveas a piece of trivia I think it was hexavalent chromate that was linked to poisoning in water supply for the movie Erin brokavich. Used as a coating in the pipes I think. Link to comment Share on other sites More sharing options...
Philbee Posted 9October, 2016 Report Share Posted 9October, 2016 Mr. Buchanan Auto, the engine pics look great and what a job! It must have taken a few manhours to get all that done? But I can't seem to see scrolling through all the commentary what it cost? its definitely great to see it all but can you hit us with some reality, a financial insight into this work of machinery art?yoursbudget challenged but loves to admire philbee Link to comment Share on other sites More sharing options...
Stu Posted 13October, 2016 Report Share Posted 13October, 2016 Agreed Warren - I am keen to know a ball park cost, Bruce would you share that? Link to comment Share on other sites More sharing options...
Buchanan Automotive Posted 13October, 2016 Author Report Share Posted 13October, 2016 As of yet we have yet to complete the invoice, once done i will let you guys know where about we land.RegardsSean Link to comment Share on other sites More sharing options...
Stu Posted 13October, 2016 Report Share Posted 13October, 2016 Ok thanks - just keen to know the ball park as I will need something similar soon Link to comment Share on other sites More sharing options...
JonoF Posted 16October, 2016 Report Share Posted 16October, 2016 We were given the privileged opportunity to reseal and freshen up a customers 1985 911 3.2 in the last few months. The main reasons for the tear down was due to oil leaks and some gearbox issues with 2nd through to 4th. While apart it gave us a chance to do a little spring cleaning, bringing the original tinware back to life, getting rid of the stains on the aluminium manifolds and associated sand castings, long with plating every nut, bolt and clamp we could get our hands onto, Also going to town on the exhaust bringing the quality up to the rest of the freshen up. When apart there was very little to do inside as we have run this oil on a 20w50 near birth, Internally there was no wear of the rockers and rocker shafts, zero wear of the cam shaft lobes, no wear of the aluminium intermediate shaft gear and timing chain sprockets. We did however install new chains, guides, big end bearings and chain tensioners. The gearbox had some new dogs,syncs and sliders installed 1st-4th. Here are some pictures of the progress so far.RegardsSean Absolutely stunning work, Bruce and Sean! You are masters of your craft. Thanks for looking after my old man! I'm very keen to take the old girl for a spin! I might even need to book my 3.0L SC in for the same treatment.... do you guys do a family discount. ;)does it get full throttle? Not during the 27 years I have known the car. Link to comment Share on other sites More sharing options...
SimonN Posted 16October, 2016 Report Share Posted 16October, 2016 JonoOMG! Your old man is spending your inheritance, or is he investing to increase it Link to comment Share on other sites More sharing options...
JonoF Posted 16October, 2016 Report Share Posted 16October, 2016 JonoOMG! Your old man is spending your inheritance, or is he investing to increase it I cleaned that car every weekend for 20 years of my life, so fingers crossed it is the latter. ;) Link to comment Share on other sites More sharing options...
Stu Posted 1November, 2016 Report Share Posted 1November, 2016 Any news on ball park cost on such a rebuild Sean or Bruce? Not necessarily this one but just a range? Link to comment Share on other sites More sharing options...
Philbee Posted 1November, 2016 Report Share Posted 1November, 2016 Any news on ball park cost on such a rebuild Sean or Bruce? Not necessarily this one but just a range?good question Stu, I asked same 3 weeks back.... Still waiting... ? Link to comment Share on other sites More sharing options...
Buchanan Automotive Posted 1November, 2016 Author Report Share Posted 1November, 2016 Sorry guys still have not done the invoice yet. The invoice should be done in a day or 2. If i were to hazard a guess i would say just on 20k for the engine. Im referencing this off our last 3.2 we did but from memory we did hi comp Mahle pistons, Vertex engine fan and a few other no engine related parts.RegardsSean Link to comment Share on other sites More sharing options...
Stu Posted 2November, 2016 Report Share Posted 2November, 2016 Great thanks for that Sean, this job looks amazing! Link to comment Share on other sites More sharing options...
Sumoman Posted 2November, 2016 Report Share Posted 2November, 2016 I have really enjoyed the oil theme as it is something I have always wondered! Thanks everyone, this it a great thread. Link to comment Share on other sites More sharing options...
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