Anti-freeze in oil

My son bought a 1988 toy truck with anti-freeze in the oil. The head gasket
is a given. I have been told that the head bolt require a special silicone
to seal them, and if they do not have it they will let the water into the
oil. The engine has a fresh re-build and the spark plugs show no signs of
water. Any help would be appreciated, this is my "first time" with a
toyota.

On Mon, 13 Mar 2006 14:18:18 -0500, "ApacheDriver"
<kelly.hess@us.army.mil> wrote:
[color=blue]
>My son bought a 1988 toy truck with anti-freeze in the oil. The head gasket
>is a given. I have been told that the head bolt require a special silicone
>to seal them, and if they do not have it they will let the water into the
>oil. The engine has a fresh re-build and the spark plugs show no signs of
>water. Any help would be appreciated, this is my "first time" with a
>toyota.[/color]

There are good instructions to be found on the web for head removal
replacement. I haven't heard of a special silicone but that doesn't
mean it doesn't exist. I'd make sure the head and block are flat.
The timing cover can also be the problem. The truck I have had the
timing cover damaged early in life ... the dealer replaced the head
gasket, then went back and did the cover which was the problem.

It sounds like the timing chain may have worn a groove in the timing
cover. The chain can stretch with use and age where the oil pressure
operated tensioner can't take up enough slack which will break the
drivers side plastic chain guide. All this ends up letting the timing
chain rub on the timing cover until it cuts a groove around 3/16"-1/4"
deep hitting a coolant passage. It makes a big mess, pull the head,
timing cover and have a look. clean the resulting sludge from
everything possible (radiator, engine block, head, oil pan, etc).
Hopefully it wasn't driven too many miles with the compromised oil
wearing on the motor.
This does happen as I am currently repairing a 1990 toyota pickup,
22re with the above problem (clean spark plugs, good compression, mixed
coolant and oil). There is a fix (which I am doing) for the problem, a
few companies offer metal timing chain guide(s) with hard rubber bonded
for a whole lot more durability. (check: engnbldr.com)
As far as the silicone question, never heard of it nor used anything
on head bolts or head gasket.

It sounds like the timing chain may have worn a groove in the timing
cover. The chain can stretch with use and age where the oil pressure
operated tensioner can't take up enough slack which will break the
drivers side plastic chain guide. All this ends up letting the timing
chain rub on the timing cover until it cuts a groove around 3/16"-1/4"
deep hitting a coolant passage. It makes a big mess, pull the head,
timing cover and have a look. clean the resulting sludge from
everything possible (radiator, engine block, head, oil pan, etc).
Hopefully it wasn't driven too many miles with the compromised oil
wearing on the motor.
This does happen as I am currently repairing a 1990 toyota pickup,
22re with the above problem (clean spark plugs, good compression, mixed
coolant and oil). There is a fix (which I am doing) for the problem, a
few companies offer metal timing chain guide(s) with hard rubber bonded
for a whole lot more durability. (check: engnbldr.com)
As far as the silicone question, never heard of it nor used anything
on head bolts or head gasket.

It sounds like the timing chain may have worn a groove in the timing
cover. The chain can stretch with use and age where the oil pressure
operated tensioner can't take up enough slack which will break the
drivers side plastic chain guide. All this ends up letting the timing
chain rub on the timing cover until it cuts a groove around 3/16"-1/4"
deep hitting a coolant passage. It makes a big mess, pull the head,
timing cover and have a look. clean the resulting sludge from
everything possible (radiator, engine block, head, oil pan, etc).
Hopefully it wasn't driven too many miles with the compromised oil
wearing on the motor.
This does happen as I am currently repairing a 1990 toyota pickup,
22re with the above problem (clean spark plugs, good compression, mixed
coolant and oil). There is a fix (which I am doing) for the problem, a
few companies offer metal timing chain guide(s) with hard rubber bonded
for a whole lot more durability. (check: engnbldr.com)
As far as the silicone question, never heard of it nor used anything
on head bolts or head gasket.

Thanks for the info. The engine compression test showed 120, 130, 95, and
110 and all held the pressure. The pressure test on the cooling system did
not fare as well. I can hear air escaping from the front of the head behind
the timing chain. Hopefully that indicates a bad gasket. Any help out
there?

A good rule of thumb for compression testing is all cylinders need to
be within 10% of each othe. With your 120 as the median (132 high/108
low) that 95 psi seems out of line, 110 psi borderline.