3.0 into my 1972

Christien · Christien's Garage

I'll be doing this probably next week, as soon as the 3.0 arrives. Can anyone point out any pitfalls to look out for? I'll be using my Webers and exhaust, fan, alternator, etc. from my old engine, distributor/wires/plugs are coming with the new engine. I'm guessing I'll be using the oil cooler from the 2.4 as well.

Thanks!

Joe Bob · Joe Bob's Garage

Check head studs.......

Christien · Christien's Garage

Done. Engine passed PPI - no broken headstuds, and compression and leakdown, while not perfect, were within acceptable.

coldstart · 07-25-2011, 09:30 AM

Very cool Chris! Let me know if you need any help or tools for the drop and install. Is this engine number three for your car/garage? What are doing with the 2.4 and the 2.0?

BTW, I have some of your stuff (valve adjustment tool, some parts).....

jess p · 07-25-2011, 09:42 AM

I am considering doing this as well. 3L into my 76 911s

What did you do about the cd ignition 6 plug vs 3plug. How about the flywheel
and or starter gear.

Christien · Christien's Garage

I have MSD ignition, plus the wiring comes with the engine, so that shouldn't be a problem. 1972 is a 915 transmission, so the flywheel/starter gear should be identical.

Rich: probably don't *need* help (I've dropped the engine 3 or 4 times now) but you're more than welcome to come by. I was wondering what happened to my valve adjust tool! No matter, I've bought another one, so you can keep that. What else do you have?

boyt911sc · boyt911sc's Garage

Quote:

Originally Posted by Christien

Done. Engine passed PPI - no broken headstuds, and compression and leakdown, while not perfect, were within acceptable.

Christien,

Are all the cylinder head studs made of steel for the exhaust sides? If they are steel, then they must have been done or replaced by PO. And that's a plus.

Tony

bluesky · 07-25-2011, 10:37 AM

You might want to check on how the tach is going to pull its pulse with your new motor.

I thought the 3.0L & its associated CD box set-up sent a different pulse than what the stock 72 was set up for.

Christien · Christien's Garage

Will the tach adaptor from MSD not solve that problem?

BK911 · BK911's Garage

I put a 3.0 into a 73 a couple of years ago. The only "issue" I can think of is the wiring. A couple of connections needed to be switched around inside one of the 14 pin connectors. I used the 6 pin cdi and SC tach so maybe yours will be a little different with the MSD.

Rotmilky · Rotmilky's Garage

Looking forward to your install. I'd like to hear more about your experience when you go through it.

Out of curiousity, is the cooling in your 72 stock, and if so, is that sufficient for a 3.0L?

bluesky · 07-25-2011, 12:00 PM

Quote:

Originally Posted by BK911

I put a 3.0 into a 73 a couple of years ago. The only "issue" I can think of is the wiring. A couple of connections needed to be switched around inside one of the 14 pin connectors. I used the 6 pin cdi and SC tach so maybe yours will be a little different with the MSD.

This is exactly what I had to do on mine....I adjusted the pins in the 14 pin connector to feed the signal to the tach.

However, I wanted the 73 style gauges in mine, so when I had North Hollywood Speedo refurbish my gauges, they told me that they made the tach 'universal' so that it would read the signal sent from any CD box....this allowed the tach to now read a signal sent from the CD box used by the 3.0L.

So, Christien, I think will you will have to either pick up a SC tach to read the signal or get your 72 tach converted to 'universal'. A quick call to North Hollywood will confirm this.

techweenie · techweenie's Garage

I had a 3.0 in a '73 coupe years ago. It's transformative. You will enjoy the combination -- especially if you retain the 7:31 final drive. You may need auxiliary oil cooling capacity for long hard runs or track use.

Christien · Christien's Garage

From what I've read, the additional oil capacity of the 1972 provides adequate cooling. Couple that with the fact that I don't drive car on really h

Quote:

Looking forward to your install. I'd like to hear more about your experience when you go through it.

Out of curiousity, is the cooling in your 72 stock, and if so, is that sufficient for a 3.0L?

Christien · Christien's Garage

From what I've read, the additional oil capacity of the 1972 provides adequate cooling. Couple that with the fact that I don't drive car on really hot days and i should be ok. (haven't driven in almost 2 weeks dueto a heat wave in the high 90s)

Quote:

Looking forward to your install. I'd like to hear more about your experience when you go through it.

Out of curiousity, is the cooling in your 72 stock, and if so, is that sufficient for a 3.0L?

bluesky · 07-25-2011, 04:19 PM

+1

Just as a basis point, I do not have an additional oil cooler set-up on my 73 with the 3.0L. It runs very cool.....

Good luck with the transplant procedure and let us know how it turns out.

techweenie · techweenie's Garage

Quote:

Originally Posted by Christien

From what I've read, the additional oil capacity of the 1972 provides adequate cooling. Couple that with the fact that I don't drive car on really hot days and i should be ok. (haven't driven in almost 2 weeks dueto a heat wave in the high 90s)

Actually, I believe the '72 has less oil tank capacity than the previous and following years.