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Loose exhaust manifold, part 2 |
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Plan- |
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Now to remove the intake, turbo, exhaust manifold, alternator, and
eventually the head. The first thing I noticed when I came
into the shop was big pool of black engine oil on the ground.
I had the plug out of this thing for 5 hours yesterday and still got
about 3/4 of a quart of nastiness out if it. In the future,
when changing the oil in my Supra, I
will jack up the drivers side of the car and let it sit for a few
hours. |
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Project- |
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With the throw out arm removed and the bolts holding the
pressure plate to the flywheel out, the trans slid right off.
I then mounted the engine to an
engine stand to make the work easier. I was a little
leery of having so much (not to mention expensive) weight hanging
out in space, but everything worked as advertised. I noticed
that the valve
covers had been leaking (another dealer repair already going bad).
I will definitely be getting rid of the
valve cover screws. |
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I took the cams out and bubble wrapped them up so that I could move the
head around and not worry about banging a valve. The head was
seriously over-torqued. I had to block the engine stand wheels,
stand on the legs, pound down on the ratchet with a hammer while a
friend put all his weight on the end of a 4 foot pipe slipped over the
end of my ratchet. It's a good thing none of the bolts tripped
out. |
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I spent a few hours with the degreaser, cleaner, and a scrub brush to
get the head all cleaned up (turned out to be a waste of time). |
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Difficulty- |
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1- The only real difficulty will be remembering where all the bolts go
when it's time to put this all back together. I had a number of ziploc bags that I put sets of bolts in and labeled them with a
pen and masking tape. |
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2- The closest thing I had to a problem in stripping the engine was
the trans. I had to pull harder on the throw out arm than I wanted
to as it seemed like it was still attached. It wasn't, it just
needed some persuasion. |
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Problems- |
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3- A number of vacuum hoses look to be dry rotted and I will be
replacing them with stock since they are in such easy reach. Next time I will
go with Hose Techniques. |
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4-
With the turbo off, it's easy to see the manifold has been leaking.
There is carbon build up all around the exhaust side of the head,
the back bolt had backed off a 1/16 of an inch, and about 2/3 of the
bolts were loose. Sure does seem like a lot of problems for an
engine that was worked on less than 40,000 miles ago. |
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5-
Three of the exhaust manifold bolt holes are stripped inside the
head. The stock thread is 10x1.25. I guess I will be
putting in some heli-coils. |
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6-
Oops! Wait a minute! While cleaning the deck of the head, I
noticed a crack between one of the bolt holes and a water jacket.
This can be repaired by a competent machine shop by welding and re-decking. |
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7-
I also found some rice kernel sized chips missing from the edges of
the water jackets. I can't see these as having broken off
since the last engine work. I think that these were missing
when the dealership did the work, and they over-torqued the head to
get it to pass the warranty period. After a few calls and some
advice from a bracket racing friend of mine, I was able to find a
head shop that could weld the crack build up the water jacket edges
and re-deck everything for $175.00. |
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8-
A slight blown head gasket. I can see where the copper seal has
stretched around the water jacket holes. There isn't much
actual seal material. Most of the head gasket is just a carrier
for the fine copper edges. I'm sure that the seals had blown
due to no clamping pressure where the edges were chipped.
Another dealer caused problem. |
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Intermission- |
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Well, the more I look, the more problems I come up with. I
guess while the head is out, I will
clean up the block.
That is if the block is still true. |
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Transmission is off |
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The engine stand makes it much easier to work on |
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Obvious loose manifold |
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Head is off |
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A couple of the stud holes are stripped |
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Crack in the head |
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Chips missing from water jacket edges |
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Another blown head gasket |
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Last updated:
Freitag Oktober 21, 2005
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Time |
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144 hours (20 hours here) |
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Total costs |
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$1,683.50 ($8.00 here) |
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Materials &
parts |
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Engine degreaser- $4.00 |
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Brake cleaner- $4.00 |
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Duct tape- on hand |
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Bubble wrap- on hand |
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Small plastic bags- on hand |
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Rubber bands- on hand |
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Tools |
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Ratchet and sockets. |
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Wrenches |
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Phillips head screwdriver |
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Flat head screwdriver |
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Pliers |
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14mm allen socket |
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Small head scrub brush |
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Engine stand |
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