New head gasket replacement video from Gasket Masters

Need to start a thread where people chime in on their egr delete. I know of quite a few people now doing it. I think im at like 25,000 miles on my egr delete. Still running well. Also, the catch can reroute on my car. Had a morning cold start knock a couple times here and there with the old routing. I haven't had one in over two years now either.
Listening to the *F1 guys talk about designing high compression turbo motors completely around knock levels and bare minimum fueling was what spurred a lot of my mods.

 

Well, when the opinion in question is about head gasket longevity, that's a good way to settle it.

When the opinion is about what somebody else's written words meant, reading works pretty well.

 

Funny, mine lasted 301,000 miles before it "started" to go. I caught it early and didn't waste time.
That's a LONG time for ANY engine!
I've cleaned my egr system every 60-80,000 miles and it was not clogged completely at any time.
Lot's of soot, but nothing heavy.
I used the Toyota gasket set with new head bolts.

 

The issue at hand is not to compare Apple and Orange...

One should not compare a non-hybrid engine to a hybrid engine...
Both engine should have the same design and function, there are many Toyota non-hybrid engine you can compare to...

No, I'm not a business. However, I do work in the automotive industry, but not in automotive service industry...

Repair Prius is just something I do, I buy broken down Prius, repair them and after driving a period of time, then put them back on the road (sell) for other people to enjoy..

I have bought many Prius with mileage from 210K to 260K, some never had a gasket issue and while some do.
I'm currently working on one with 225K on the clock, it has a blown head gasket to #2 cylinder. And the cause is a bad electric engine water pump, the previous owner knows nothing about cars, and just keep on driving while it overheating and until it goes to lamp mode...

Posted via the PriusChat mobile app.

 

It has nothing to do with egr

 

"It" has to do with EGR and the condition of the pump (especially its impeller), and the way the car is operated and design weakness.

 

Encouraging!
I wonder if toyota cars without EGR have better records for HG life?

But when you buy these old crappy Prii you don't really know the history of the HG or any other maintenance performed.
Who knows, some of the previous owners may be readers of this forum and had the EGR circuit cleaned every 50k miles, as some here recommend. Do you factor in all that money and/or labor into the cost of driving a Prius? The fuel savings may get canceled out.

 

However I totally disagree with this point of view.
Both engine should make power when requested by the driver.
What's not to compare?
Lack of an EGR system would be a good starting point...

 

I still find this video interesting:

him diagnosing the car misfires/knocks with unplugging the egr valve. The moment you unplug the valve the car clears up. I didn't really agree with anything else they had to say outside of the way they were magically able to guess how to diagnose the egr system by unplugging it.

I really bet the gasket masters guys have indirectly saved hundreds maybe thousands of priuses from egr related head gasket failure from that video. They saved me.

 

How can that be if, as I understand, the computer reacts to disconnection of EGR wiring by changing ignition timing (and perhaps other variables) to compensate? EGR tends to suppress knock, but so does retarding timing, or richening the fuel-air ratio.

 

I disagree also.
I thought the whole theory is the EGR flow is clogged first at the farthest intake ports, Cylinders 1 and 2, probably because the EGR gasses have time to cool going through the plastic intake manifold, which will always be cooler than the surrounding engine parts.

Clogged EGR is uneven flow of the EGR gasses, which would mean cylinders 3 and 4 are getting more than planned,
and 1 and 2 less to no flow.

Whereas defeated EGR is even flow to all the cylinders, correct?
What would be the efficiency loss? Who knows? 3 -4%? That's hard to track on MPG numbers.
I'm willing to test this 'alternate' theory.
@Pala is well into this testing.

 

Love seeing updates from (you) those guys, of course I hope his son (?) is still in the mix, as he was so 'cool' compared to his "elder".