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Toyota Prius, Automotive News
#536 of 595 Now that I'm here, though....
Jul 16, 2012 (11:44 am)
I finally ran a leak-down test on my Escort a couple weeks ago, and the results pretty much confirmed what I already suspected: The rings aren't happy, and the valve seats may (?) be developing cracks.
I almost don't even want to dig into it because I'll be thinking the whole time, "while I'm in here, I might as well do this, and that, and this, and the other, and...." The engine generally runs great aside from it continually losing power little by little. While I ran the test, there was a substantial amount of air flow from the crankcase (coming out the hose that goes (or used to go, anyway) to the PCV). All four cylinders were within a couple percent of 20% loss, according to the gauge. So, that indicates that while wear is fairly consistent, it is at the point where something needs to be done.
I was thinking I would get a rebuilt head (save me quite a bit of time and not really cost much more considering the incremental cost of all the parts that go in there) and focus on just going in, replacing the rings, and re-hone the cylinder walls, while only replacing the gaskets, seals, etc., that need to be done as part of that process.
I'm sure I could go overboard and replace every little piece and part in there along the way, but I am planning to move on to a new car in the not-too-distant future. If I can keep myself to a $1000 (or under) project, this seems like a reasonable course of action to me.
#537 of 595 Re: Article From Today's NY Times... [xwesx]
by Stever@Edmunds HOST
Jul 16, 2012 (12:19 pm)
Plugs and wires were done at 124k back in May, 2008, so only 52,000 miles ago.
while I'm in here, I might as well do this
Sounds like home remodeling. At least when you change out the plugs, that doesn't make the battery look dingy or the air filter housing look outdated.
#538 of 595 Re: Now that I'm here, though.... [xwesx]
Jul 16, 2012 (12:28 pm)
I think before I did all that refurb work, I would be checking out the junkyards for a decent used engine. It can't be that horrible a job on an Escort and would probably have the car up and running faster.
Just my .02.
#539 of 595 Re: Now that I'm here, though.... [tjc78]
Jul 16, 2012 (12:36 pm)
If the car wasn't running currently, I would strongly consider that. As it is, I am not convinced that any used engine out of a yard would be in any better running condition than the one I currently have.
#540 of 595 Re: Now that I'm here, though.... [xwesx]
Jul 16, 2012 (1:44 pm)
Good point. If you could get lucky and find a low mileage wreck, otherwise your plan may be better.
#541 of 595 Re: Now that I'm here, though.... [xwesx]
by MrShift@Edmunds HOST
Jul 16, 2012 (6:30 pm)
How many miles on this engine? Is it burning oil?
#542 of 595 Re: Now that I'm here, though.... [Mr_Shiftright]
Jul 24, 2012 (9:20 am)
I'm just about to turn over 160,000. It loses a little bit; perhaps a quart+ every 3,000 (I tend to put around a gallon of "make up oil" in it every year between changes). I don't have the hose to the PCV connected, though, and it does send a little bit out that way (not sure how much that adds up). I'm sure some of it ends up in the cylinders, but not enough to observe any blue smoke out the tailpipe. It doesn't have any leaks on the engine, though, so oil loss must be through one of these other means.
Sorry for the slow reply; had a bit of an emergency last week that put me way behind on everything, including visiting Edmunds!
#543 of 595 Re: Now that I'm here, though.... [xwesx]
by MrShift@Edmunds HOST
Jul 24, 2012 (1:44 pm)
Well that's not an oil burner, so internally the engine is probably okay. your leak down is probably a valve issue then--so a new head would fix that. I usually dont' recommend a new head on an oil burning engine.
#544 of 595 Re: Now that I'm here, though.... [Mr_Shiftright]
Jul 24, 2012 (1:25 pm)
Meaning that I shouldn't bother pulling it apart, or that it is worth the effort to do so because the major components are likely to be in good condition? If the former, any thoughts on what else might be causing the excessive pressure in the crankcase?
#545 of 595 Why is this thread here?
Jul 25, 2012 (6:50 am)
I don't want to make waves or controversy, but why is this thread here? By repairing older vehicles you are not being that green. I could better see threads like this in a forum deal with keeping older vehicles rolling or a forum dealing with restored vehicles. Most of the last few discussions did not involve the Prius.