What engine is this??

[911 tweaks]

I am in need of info on what I have here.

1. I am told this is a 79' 3.0 SC engine, *6591617*, true??

2. Type # 930/06

3. Top center of case halves both have # 887 = both case havles match.

4. ****** 2 silver round discs either rivited into case or threaded in say,
"GUARANTEE VOID IF REMOVED"...What does this mean??

5. **** a number is stamped under the Red paint, almost at the case seam,
between the 2 silver discs and the number under the paint is 2 0 . What does this mean??

I hope I didnt buy a boat anchor...any and all help is much appreciated!!!

Bob

[911 tweaks]

lets see if this loads the pics

[911 tweaks]

ok, this is going to be painfull to load the pics...bear with me...

[anthony 911]

78/793.0911 sceng california

[BURN-BROS]

The disks are from a rebuilder, typically these are found on a rebuilt domestic engine.

[911 tweaks]

Thanks Aaron.

Rebuilt in what sense? Why would one put holes on the case to attach these?

Actually, I just went back and looked at these with a magnifying glass... these silver discs are glued on here. They may be capping holes or something underneath...wonder if I should try to pop one off??

Anyone know about the red paint to hi-lite the number 20 stamped into the case?

Bob

[911 tweaks]

Aaron, can you explain any other points I raise?

Any idea who may of rebuilt this and is it traceable if it was rebuilt by the Red #??

Thanks in advance!!
Bob

[cstreit]

Originally Posted by 911 tweaks

..wonder if I should try to pop one off??

but then you'd VOID THE WARRANTY...

[911 tweaks]

you guys in the rebuild business...please clue me in on this!

What do I have here?

I can ask a million questions but I have no solid answers as of yet.

If this was rebuilt, does this practice still happen oR is/was this a practice 5 yrs ago, 10 yrs ago, 20 yrs ago? Was it a dealer thing? Is this a traceable rebuild? What about the red paint over the number 20 stamped into the metal? Was this a California practice on rebuilds as no one here east coast has ever seen this before!!

You guys are making me pull this out of ya...can anyone provide specifics?? (I am trying to see if I bought a pig - n - a - poke and have a POS engine long block!!)

H E L P !!

Thanks in advance to those who know what I have and can answer my questions.
Bob

[efhughes3]

Yep, you bought a pig-in-a-poke POS.
Who's to know? Why did John Hancock sign his name as he did?

[Jeff Alton]

Hard to tell. It may be a POS and it may be fine. What are you plans for it? Were you hoping to bolt it in and go? or were you planning on pulling it apart?

From the pics with all the leaks etc, it looks like a core to me.

Tell us what your plans are for it and you will get more specific advice. Did you pay good money or rebuildable money?

Cheers

[TibetanT]

Subscribing for info.

[TibetanT]

Whoops! Since I am subscribing for information, I thought it pertinent to add some valuable information as well.

First the engine number, 6591617. The first number, 6, relates to the number of cylinders which is 6. The second number, 5, means it is an engine that was meant to be mounted into a Porsche 911SC Coupe or Targa bound for California, USA. The third number, 9, represents the model year, which in this case is 1979.

The last four numbers, 1617, represents a serial number which equates to the number of this engine rolling off of the assembly line. In this case (pardon the pun) it is the one thousandth, six-hundred seventeenth engine made. Germans have been very good at keeping track of things such as Porsche engines.

Now, I am not an expert, but from the pictures posted here, it seems to me this engine came right out of a car. It doesn't appear to be rebuilt, or if it was rebuilt, it was done a while ago and has been running/leaking/collecting dirt like any normal engine would do over time. Again, I am no expert, but another thought I had was if it is rebuilt, the machine shop did not clean up the engine before reassembly, they just put it back together again. Hmmm???

By the way, are you going with carbs or do you need a CIS system for it?

Hope this helps.

[911 tweaks]

thanks for the replies!!

The engine did come out a crashed 79 targa and was the original engine w/ 160k on odometer. Sorry for not sharing that info 1st however I have been in panick mode as when I inspected the engine, these were coveved in grease, I didnt see them. THEN I get it back to the shop and voila!! Holly sh^t what did I buy went screamin' through my brain!!

Anyway, the intent is to build a 3.0 RSR w/carbs. So I will be tearing it down, HOWEVER, if anyone can shed light on who and/or when this was rebuilt, I would like to know. (I hate to even think it, but it has crossed my mind that, "oh no...could this be a MM rebuild = boat anchor??")

Henry or any engine builder, any input??

Thx Bob

[BURN-BROS]

Bob, There is nothing under the disks to worry about. You can remove them. I have that same disk on the engine in my mustang. The red paint and stamp may have been during the rebuild to keep track of it. The stamping may also mean that it has been align bored which may be an expensive issue if bearings are still hard to come by. Typically the machine shop will stamp at the rear of the case behind the flywheel. Since this may not have been rebuilt by a Porsche specialist, the # could be where you have found it.

I would pull it apart and check the mains for an align bore and for a crank that has been reground. Number your bearings and bag them.

As Anthony911 stated the engine is a 78/78 911 sc engine for california. The 78/79 SC engine has big port heads and is a good base to do what you are thinking of doing.

[turbobrat930]

Those discs are put on rebuilt motors to havwe a tell tale sign of an over temp. In other words, If you overheat the motor, the disc changes color, and the shop that rebuilt the motor can tell that you overheated the motor, hense voiding the warranty...

If you bought this engine as a core, than don't worry about the discs, they are glued on with something like JB weld... just pop them off with a chisel and hammer. As far as the motor, that should be a 3.0L out of an SC. But doesnt a motor with the tensioner updates have a pressure line going to the front of the timing chain cover???

[tctnd]

The discs are temp telltales. If the engine is returned to the rebuilder for warrantee work and they find the discs have changed color, they know it has been overheated and won't warrantee it.
regards,
Phil

[911 tweaks]

Awesome info guys!! Thanks a lot turborat, Aaron and Phil and others. That is a great idea for a rebuilder to help them know what they may get back from a customer to begin discussion as to why the customer claims the engine is doing what ever.

Any tips on areas to look at during disassembly to see if previous builder machined, replaced, or screwed up something...probably I will have to proceed very slowly and carefully to see what I have OR don't have.

I will check in back by the flywheel seam to see if any stamp there... any other tips/areas to look fro watch out for??

Thanks alot!

Bob

[911 tweaks]

just to wrap up this post... Thanks alot to all who helped... I really appreciate it!!

Anyway, I got to the bottom of it. To make a long story short...the seller of the long block did confirm that this is an O.E./never opened enging w/ 160k miles. HE put the discs on it as he felt that with the leak downs ranging from 4-9% and the cyl compression 150-170, that the engine is getting tired, but it was a running engine in the wreck it came out of.

So, I will post another thread to show the future of this LB... I think a friend of mine may be willing to help me turn it into a RSR 3.0, carbs, twin plug,... as he is quite knowledgable and familar with that type of engine.
Bob

[IDGAF27]

I know it is verrrrry old thread, but it was brought up in other very recent thread, so let me chip in about those "discs".

any junk yard, dissmantler, salvage yard glues them on once guarantee to the part is given. most of , those sellers, parts are sold with 30 to 90 day guarantee.
In order to protect them self from scammers that takes good parts( lets say) from seller and just before guarantee expires brings some core crap for refund.
Those discs just aluminum stamp glued to the case.
Yes, I am talking from my experience. Placed many discs like that on parts sold.