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1990 mk3 turbo
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28 Posts
Discussion Starter · #1 ·
Greetings all! I have been tinkering away on my 90T and have noticed a bit of a leak on the exhaust manifold I think... After running the engine for some time, I smell oil burning and have visible smoke. I have included some photos of the area. This is the passenger side new the front of the engine.

My question are, is this a gasket issue and should I wait to tackle this when I am planning to have the turbo and intercooler replaced?

Previous owner had the head gasket and bolts replaced. Just making sure this isn't the same thing...

Thanks!
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1987 Toyota Supra
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485 Posts
Its probably just the CPS oil seals that have gone bad.
Dripping oil down on the exhaust manifold.
 

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1990 mk3 turbo
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28 Posts
Discussion Starter · #4 ·
Its probably just the CPS oil seals that have gone bad.
Dripping oil down on the exhaust manifold.
Thanks for the reply. Being new to the supra world, is that an easy fix? I am handy with a wench and enjoy taking things apart... I do not like the smoke and smell however!
 

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1987 Toyota Supra
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485 Posts
Could be simple and just need the external o-ring seal replaced.
There is also an internal positive lip seal on the shaft.
Those are usually rock hard when I take them apart.
Shattering into dust when I press them out.

It's not too hard:
Just have to drill and press out the gear pin.
Remove the gear.
Press out the shaft, press out the bearing and seal.
Get new parts and repeat in reverse.
Check coils, set .006" air gap.
New wiring, new pins and seals and connectors
New pin for the gear, peen it.
Ect..
Ect..
 

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1990 mk3 turbo
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28 Posts
Discussion Starter · #6 ·
Could be simple and just need the external o-ring seal replaced.
There is also an internal positive lip seal on the shaft.
Those are usually rock hard when I take them apart.
Shattering into dust when I press them out.

It's not too hard:
Just have to drill and press out the gear pin.
Remove the gear.
Press out the shaft, press out the bearing and seal.
Get new parts and repeat in reverse.
Check coils, set .006" air gap.
New wiring, new pins and seals and connectors
New pin for the gear, peen it.
Ect..
Ect..
ah. real simple. j/k

thanks for the input!
 

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1990 mk3 turbo
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28 Posts
Discussion Starter · #7 ·
Also funny timing on this thread.
I shipped out another CPS rebuild today : )
Ohh...shiny new internals!
What is your turnaround time for a cps rebuild and cost?
 

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19 Posts
I'm redoing all possible gaskets, I'm leaking onto the exhaust manifold as well. I am comfortable changing the external o ring/gasket. Is there a chance that inner seal will disintegrate upon removal of CPS?
 

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90T
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721 Posts
You mean to just pull out the cps from the head? That will not do anything to the internal seal and bearing.

You may find your problem is just the o-ring, but the internal seal does turn to stone after 30 + years as piratetip mentioned.
 
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