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greekguy7
04-23-2008, 06:54 AM
I got a 1980 Cutlass with the original 260 V8 engine in it... all stock. Its basically a boat anchor but its running strong.

How durable are these engines? Its not burning any oil at 143k miles. The intake manifold gasket had to be replaced and I know this is somewhat common.

prfct80ctlss
04-23-2008, 07:00 AM
they are solid as a rock, unfortunatly some rocks can outrun them :) i almost felt bad for getting rid of mine with only 67K on it, it ran like a dream

Eightupman
04-23-2008, 07:45 AM
I got a 1980 Cutlass with the original 260 V8 engine in it... all stock. Its basically a boat anchor but its running strong.

How durable are these engines? Its not burning any oil at 143k miles. The intake manifold gasket had to be replaced and I know this is somewhat common.

Its a durable little beast. Will run for a long time if treated gently. Keep the fluids changed, and don't beat on it. Gaskets will start to go from age, sure, but the hard parts will last a while. PLUS you get better gas mileage with it as well. I noticed a BIG difference between a 260 and a 307 gas mileage test after I did a swap in my 81 10 or so years ago.

John

Beeterolds
04-23-2008, 11:31 AM
hell man if its running strong leave it alone!!! slap a set of headers and true duals on the car to get the most mileage out of that engine (headers will help for power...but thats not the reason why i mentioned them, at least for a 260 anyways)

DoubleV
04-23-2008, 12:22 PM
PLUS you get better gas mileage with it as well. I noticed a BIG difference between a 260 and a 307 gas mileage test after I did a swap in my 81 10 or so years ago.

Me too, accept in reverse! My VIN9 307 gets way better milage than my 260 ( in a 78 Cutlass ) ever did. Of course my 307 is running tip top and it's entirely possible my 260 all those many years ago wasn't.

Overall assessment; the 260 is worthless but it IS durable ( but so are many other Olds motors ).

Beeterolds
04-23-2008, 02:37 PM
another thought. the 260 while pathetic in the power dept... does seem to make a good candidate for running twin turbos while sipping E85... itll make similar power to a strong 350 mild 455 while getting small engine fuel economy... and yes.. it would be fuel injected.

Lars
04-23-2008, 05:44 PM
the 260 has a smaller bore than the main crank journals. I "heard" that it was designed to be indesrtuctable

freebie
04-23-2008, 05:50 PM
isn't it 4.3 liter v8? we should play with one and see what kind of power and mileage one could get from a TT 260

olds307 and 403
04-23-2008, 05:53 PM
Unlike a 307 they came with solid mains on the 75-76. They should take lots of boost. The Stude v8 is similar to the 260 in bore size and it can run in the 10's with twin turbos. Of course custom pistons, aftermarket rods and a 330 crank would be necessary. I'm not sure how much airflow potential any 260 head would have. Even the 307 heads are limited on their crappy exhaust side.

Seanmay1
04-23-2008, 05:53 PM
4.3 is a V6

oldscsc
04-23-2008, 06:08 PM
There is a GM 4.3 V6 but the 260 measures out to be 4.3 liters.

svnt442
04-23-2008, 06:12 PM
What he said:yep:

lostsheep
04-23-2008, 06:16 PM
what they said

Eightupman
04-23-2008, 07:39 PM
4.3 is a V6

To be CLEAR.. the 4.3 V6 was a 261 Chebby motor, and the 4.3 V8 was the 260 Olds motor.

John

philthy
04-23-2008, 07:40 PM
The Chevy 4.4 was the 267. Another turd....

TylerW
04-23-2008, 08:19 PM
To be CLEAR.. the 4.3 V6 was a 261 Chebby motor, and the 4.3 V8 was the 260 Olds motor.

John

To be even MORE clear, the 4.3L V6 Chevy was a 262cid engine. 350 minus 2 cylinders.The was also a 229 cid version, and a 200 cid version in case you were truly afraid to drive faster than the speed limit.

Olds 4.3L could refer to:

260 cid V8 gas burner, 260 cid V8 diesel or a 263 cid diesel V6, again, a 350 minus 2 cylinders but this time based on the Olds 350.

Chevy had a 265cid V8(mid 50's)265 cid L99(baby LT1, 90s), 267cid V8(late 70s early 80s)

Pontiac had a 265 cid V8 in the early 80s based on a short-deck Pontiac block.

All of these except the 267 were 4.3s...confused yet?:laugh:

oldscsc
04-23-2008, 08:23 PM
This is why the English can keep their liters and metric measurements. No I don't want a 17mm wrench. Give me a damn 1/2 inch wrench :D

TylerW
04-23-2008, 08:24 PM
To answer the original question, the 260 just about IS indestructable because the bottom end and block is the same spec as a 350-403 (other than bore size), only with 110hp filtering through.

oldscsc
04-23-2008, 08:58 PM
And the tranny should be indestructible too. It's only putting 75 horses to the ground ;)

slowcord
04-23-2008, 09:08 PM
as long as we are on the topic... is the olds diesel v6 as strong as the 8 is?

3-6 Racing
04-23-2008, 10:28 PM
I'll be the first to tell you the 260 isn't un-blow-upable, though it never wants to quit! We found that out with low gears on a 1/4 mile dirt track. It blew up so hard that it cracked the block, threw the rod through the oil pan, and caught on fire. We still got to finish the 20 lap feature, it blew up on lap 15 and run the last five laps on fire, missing one rod, and with no oil. The rest of the mains and rods were spun after the race but it still ran untill we pulled it onto the trailer and held er WFO for a while untill something seized. That was a tough little motor, I'm actually thinking about getting a short block and throwing my 5A heads on it just to see how long it will last with my gearing on the 1/4 mile. I figure that the heads give out at around 5500 on the 5A's and that we will be right at that RPM the whole way around. With that kind of setup it could be flatfooted all the way around without letting off. Throw on a HVOP and put some lucas in with 50w valvoline and it might last forever.

Lars
04-24-2008, 04:57 AM
I'm actually thinking about getting a short block and throwing my 5A heads on it just to see how long it will last with my gearing on the 1/4 mile.

ive read that the water ports between the head and block don't line up.
so your idea is a no go:(

scottb
04-24-2008, 09:34 AM
It blew up so hard that it cracked the block, threw the rod through the oil pan, and caught on fire. We still got to finish the 20 lap feature, it blew up on lap 15 and run the last five laps on fire, missing one rod, and with no oil.

I like your style. :tup:

philthy
04-24-2008, 09:44 AM
Also, isn't the bore too small for 307 heads?

firedowg
04-24-2008, 09:45 AM
Well I bought a parts car with the 260 in it, mine also had a 260 before I pulled it. Anyways this parts car had a rode knock and I mean KNOCK sounded like someone was in there with a hammer. So we zip tied the throttle open and started it! This thing ran FOREVER before it finally blew. No oil even got to the top end so Im guessing the oil pump was bad. But yeah that thing ran and ran and ran.

DukeDKT442
04-24-2008, 09:53 AM
All this bulletproof 260 talk makes me *almost* want to replace my troublesome 307 with one :laugh:

prfct80ctlss
04-24-2008, 09:58 AM
I think i would punch you in the dick if you did that.

87Salon
04-24-2008, 10:08 AM
I think i would punch you in the dick if you did that.

:eek: Holy cow, what a statement! :eek:
:box:

firedowg
04-24-2008, 10:22 AM
Yeah that never feels good

Run to Rund
04-24-2008, 04:14 PM
Oldscsc, you can't use a 1/2" wrench instead of 17 mm. Maybe a 13 mm. You can use 16 mm for 5/8 and 19 mm for 3/4. 17 and 18 are each half a size away from 11/16. After 10 years with the Cummins B diesels, I am used to having both kinds of wrenches and interchanging them where it is convenient.

But, as for the 260, it can hardly make enough power to hurt itself :) It is economical but so is a bicycle. :rolleyes: Well, it IS faster than a bicycle and who would steal it?

svnt442
04-24-2008, 05:30 PM
I knew a guy that had a 78 with a 260 and he drove his around for about 4 months with a rod knock before finally swapping a 68 350 in. That thing never did die, just kept on knocking......

oldscsc
04-24-2008, 06:47 PM
Run to Rund-I was just using that as an example. 17 sounded better than 13. I could really care less about metrics. :tdown:

DukeDKT442
04-24-2008, 09:18 PM
I think i would punch you in the dick if you did that.

Well then perhaps you should mail me your 403 just to make sure I don't... :laugh:

prfct80ctlss
04-25-2008, 05:39 AM
i have a POS 350 ide sell you, but it needs a bore and a rebuild :)