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From: Hachiroku on 25 Dec 2009 23:48
On Fri, 25 Dec 2009 22:17:55 -0500, C. E. White wrote:

>
> "Ray O" <rokigawa(a)NOSPAMtristarassociates.com> wrote in message
> news:hh3srb$pmf$2(a)news.eternal-september.org...
>>
>> "SMS" <scharf.steven(a)geemail.com> wrote in message
>> news:4b34ce7a$0$1676$742ec2ed(a)news.sonic.net...
>>> My next door neighbor's '89 Cressida was gone from the driveway and he
>>> told me that the "flow valve" needed replacement. Finally I figured out
>>> that what he meant was the exhaust manifold needed replacement (the
>>> mechanic's English is not too good, and my neighbor doesn't have any idea
>>> of the various engine parts).
>>>
>>> He said that the mechanic said that this was a common problem with the
>>> Cressida engines of that era. He also said that it would take a while as
>>> something had to be sent out to a machine shop, and they would be closed
>>> until Monday. So what would they be machining? Do they machine the
>>> manifold and then reinstall it with a new gasket or does something on the
>>> engine need to be machined as well. I had two blown exhaust manifold
>>> gaskets on my '85 Land Cruiser, and the new ones didn't seem to last more
>>> than six months, and it was a common issue with the 2F engine.
>>>
>>> The cost is $1300. Ouch, though IIRC back in the 1990's I was paying
>>> about $600 for the machining and gasket replacement. He's making noises
>>> about giving up on Toyota and switching to Honda, though IMVAIO one major
>>> repair in 20 years should not be grounds for changing brands.
>>
>> There is nothing to machine when replacing the exhaust manifold unless the
>> head is warped. A warped head doesn't necessarily require a new exhaust
>> manifold. What is the symptom that led your neighbor to bring the car to
>> the shop?
>
> That engine is an inline 6 with a cast iron exhaust manifold. Long cast iron
> manifolds like that are notorious for warping with age (and Toyota inline
> 6's are not alone in having that proplem). I doubt the head is the problem,
> unless the manifold started leaking becasue of warping or a crack. If you
> let it go too long, the escaping exhaust gases can erode the sealing surface
> of the head. If that happens you will likely need to machine the surface of
> the head that mates with the exhaust manifold. I can see this easily costing
> more than $1300 if you need to repalce the exhaust manifold and have the
> head machined. Heck almost any repair can run to $1300 these days.
>
> Ed

This engine is notorious for blowing head gaskets at ~120,000-150,000
miles unless the Service Manager read the TSB many, many years ago. Was he
having overheating problems as well?

If anything it seems perhaps instead of 'flow valve' the mechanic meant
the valves themselves, or the camshaft, perhaps? Either one of those would
add up to the amount you posted.

Also, this engine can have the head 'walk' over time.

See if your neighbor can get a better description.


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