Well Hell Just Froze Over

[Larryjb]

Chevys don't have engines that sludge up even with proper maintenance.

Um... actually mine was. If Dexcool slowly mixes with oil, the buffer additives can cause the oil to sludge. As soon as i fixed my cracked head, my oil did not sludge up anymore.

But I know what you are saying.

 

[BourbonNcigars]

Don't overestimate the stupidity of the human race.
Someone will buy it.
For full asking price.
It'll break.
They'll take it back to the dealer and argue.
Dealer will convince said moron to pay for repairs.
Dealer makes $7k off a $500 ride in the first 6 months.

Dealers are not stupid. They know people.

 

[mountie]

Chevys don't have engines that sludge up even with proper maintenance.

My '93 Cadillac STS, and that Northstar engine, required "WOT" once every 2 months to clean out the carbon.

 

[trailblazer]

My '93 Cadillac STS, and that Northstar engine, required "WOT" once every 2 months to clean out the carbon.

View attachment 245873

My dad would do that with his Buick Lucerne. Thing sounded very good.

 

[wjburken]

My dad would do that with his Buick Lucerne. Thing sounded very good.

My dad called that “Getting the cobs out.”

 

[George B]

My dad called that “Getting the cobs out.”

Gotta get the cobs out regularly.

 

[grouch]

Um... actually mine was. If Dexcool slowly mixes with oil, the buffer additives can cause the oil to sludge. As soon as i fixed my cracked head, my oil did not sludge up anymore.

But I know what you are saying.

Yeah, but the V-6 in Lexus and Toyota high end cars had small ports in the piston to reduce emissions. These would plug up and sludge the engine to the point it looked like black pudding.

 

[grouch]

My dad would do that with his Buick Lucerne. Thing sounded very good.

You can't do it on catalyst cars but I had a little trick with skeeter beaters that had good compression when I ran a shop at the salvage yard. When they'd smoke from blow by, the rings might still have life but there's would be a glaze on the cylinder. I'd head out to the country and remove the air filter. Start the engine and by hand, run the throttle to about 80-90% of full throttle. Shake a can of Bon Ami cleanser into the carburetor. It would blow a huge cloud of white powder out the tail pipe. About 1/2 the time, it would quit smoking. If not, we'd either junk the car or replace the engine. This was on our cars, not customers. I told people what I did if they bought the car but nobody ever complained.

 

[Larryjb]

Yeah, but the V-6 in Lexus and Toyota high end cars had small ports in the piston to reduce emissions. These would plug up and sludge the engine to the point it looked like black pudding.

I believe GM had trouble with small parts on the lifters or something like that. Not that that led to sludge in GMs, but it did lead to lifter failure. Ford's had issues with oil ports plugging up in the cam phasers. All these issues seem to be mitigated if synthetic oil is used.

 

[mountie]

A little trivia.... An engine of a Formula 1 race car.... the piston gap thickness of top-dead-center is less than a sheet of copy paper.