75S engine rebuild

[al lkosmal]

I'm rebuilding a 75S, 2.7 engine.........This is a stock rebuild (it happens). This will be the full meal deal......Thursdays progress......







regards,
al

[al lkosmal]

wow...this one is a mess.....lots of leaks with JB weld used as a seam sealer.....original smog pump manifold and injectors.....this should be a total beeyatch to get apart...however, due to the oil, the exhaust came off without a struggle....this one is definitely due for a rebuild.....behold







regards,
al

[fanaudical]

Is this one staying CIS? Or are you working some induction magic on this one too?

[al lkosmal]

No, unfortunately no EFI magic on this one....a stock rebuild....and it needs it.......but I have two other engines underway....a 2.7RS-ish and a 3.2....those two will have to satisfy my EFI obsession.....

[al lkosmal]

Wow....this is a messy one.....however, the oil inside the engine is very clean.....I think that this one leaked so much, it got a constant supply of fresh oil...rockers and cams look great. One head nut was off and the rest of them were so loose, I could just about loosen them with my finger tips....I thought that maybe it was the result of the head-studs pulling a bit.... and it might be....but all cam housing and the case perimeter nuts were also very loose....in fact....almost every fastener, with the exception of the cam nuts and rocker nuts...were not tightened near to spec........it has made taken this one apart pretty easy, to date...although there is one nut, covered with JB weld that might be on pretty tight...... behold the filthy beast....

[gomezoneill]

I like the orange silicone on the intakes.

[al lkosmal]

Originally Posted by gomezoneill

I like the orange silicone on the intakes.

oh yes....lots of nice sealing attempts on this one....silicone, JB Weld,, copper sealant spray......all the good stuff.

[mikedsilva]

Al, do you do your own machine work? Will you be installing case savers etc, yourself?
Hoping you document what work is carried out on the case.

[al lkosmal]

Nope...heads out to Craig Garrett, case out to Ollie's

[al lkosmal]

Crank looks good.....main bearings are slightly worn....overall, internals are not too shabby.....

[al lkosmal]

As I was disassembling the engine, the head stud nuts were so loose, I could almost turn them by hand. It took almost no force at all to remove them.......and here is why.




regards,
al

[gomezoneill]

Originally Posted by al lkosmal

Crank looks good.....main bearings are slightly worn....overall, internals are not too shabby.....

Been working on these cars since 1971. The beauty of those internals still amazes me.

[al lkosmal]

Even the stock 2.7 CIS pistons and cylinders look tasty, right out of the box......



regards,
al

[gomezoneill]

Is that a 5 cylinder engine?

[brp914]

Originally Posted by al lkosmal

As I was disassembling the engine, the head stud nuts were so loose, I could almost turn them by hand. It took almost no force at all to remove them.......and here is why.




regards,
al

Well, after 45 yrs, was the heli-coil/threaded insert/case saver/time cert head stud fix debate settled? Or is that like the dreaded dilivar / Supertec debate?

[al lkosmal]

Originally Posted by gomezoneill

Is that a 5 cylinder engine?

Yes, we're doing everything we can to reduce weight.........

[al lkosmal]

Originally Posted by brp914

Well, after 45 yrs, was the heli-coil/threaded insert/case saver/time cert head stud fix debate settled? Or is that like the dreaded dilivar / Supertec debate?

No, the debates continue...we'll need another 30-40 insert threads (no pun intended) to ensure that we gather every opinion out there. It would be interesting to hear what type of oil everyone recommends though...............


regards,
al

[al lkosmal]

The heads for the 75S are looking a lot better now that Craig Garrett (CGarr) has worked them over...........

if you need your heads rebuilt...he is the man.

[jimtweet]

something to be said about stock Al, im in the process of a one off resto now on a rare 911, and really digging the whole restoration thing. Our of my norm, hot rodding, but its fun

[Cornerlot]

Originally Posted by al lkosmal

The heads for the 75S are looking a lot better now that Craig Garrett (CGarr) has worked them over...........

if you need your heads rebuilt...he is the man.

Took my heads out to Craig Garrett last week, he's conveniently 1-1/2 hours away so I took the drive in person. He said about 2 weeks...