Piston Slap: So Hot, Yet So Cold!

Nick writes:

Hello Sajeev,

(I really wanted to put the “n” in there.)

I have a ’97 Prelude that will sometimes cycle on and off its air conditioning when it’s unbearable hot outside (June-September here in Phoenix). Air will come out nice and cold, then it will get real warm suddenly for about 30 seconds before getting cold again. It only happens when it’s extremely hot outside and I’ve been driving for awhile. It works fine the majority of the time. What do you think?

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Piston Slap: The Truth About "Throwaway" Motors
Dan writes:

Dear Sajeev,

A recent post on the CX-9 users forum (at www.mazdas247.com) caught my eye. An stalwart owner tore down his 3.5 (Ford) engine to clean up a sludging problem and broke a rod bolt in the process. He then discovered much to his dismay that replacement rod bolts are not considered “serviceable parts” by Mazda. In fact, it turns out that most of the internal engine components you would want to replace in a rebuild are not available from Mazda. (This is true for both the 3.5 and the more recent 3.7 litre versions.) Unavailable items include pistons, rings, bearings, etc. Searching on-line one can find the typical factory exploded parts diagrams with all these internal components listed, but in lieu of part numbers there is the notation, “This part is not serviced.” ( Here’s an example)

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  • Doc423 Well said, Jeff.
  • Urlik My online research seems to indicate it’s an issue with the retaining clips failing and allowing the valve spring retainers to come out. This results in the valve dropping into the cylinder.
  • EBFlex Typical Ford. For those keeping track, Ford is up to 44 recalls for the year. Number one recalled manufacturer (yet again) by a wide margin.
  • Lorie Did they completely forget the damn 2.0 ecoboosts that have the class action lawsuit? Guess those of us that had to pay out of pocket for an engine replacement for a fail at 76k miles are out of luck? I will never buy a Ford again.
  • Mncarguy I remember when the Golf came out and all the car magazines raved about it. I bought an early one in the mid level trim, brown with a beige vinyl interior and a stick. I must have blocked out a lot about that car, because the only thing I remember is one day with my wife and infant in the car, the brakes went out! I could use the parking brake and made it home. There must have been other issues (beside an awful dealer who felt like they were doing you a favor even letting you come in for service) because I swore I'd never buy a VW again. I did get a new Beetle and later a Passat. That's another story!