[Mk2] [Turbo] Changing rocker cover gasket

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Luke820
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[Mk2] [Turbo] Changing rocker cover gasket

Post by Luke820 »

I need to change my rocker cover gasket and oring in side the distributor on my 93 (rev 2) as I have a oil leak, what gaskets would I need, I know I would need rocker cover gasket and inlet manifold gasket are there any more I need? And I hear changing the bolts is a pretty good idea as the standard cross head ones are rubbish.

Thanks
the bear1986
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Re: [Mk2] [Turbo] Changing rocker cover gasket

Post by the bear1986 »

I too need advice on this issue as mine is leaking also.
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toxo
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Re: [Mk2] [Turbo] Changing rocker cover gasket

Post by toxo »

Right. If you have a turbo you don't need to touch any of the inlet manifold stuff except the throttle body where you can generally get away with reusing the gasket, unless it's rusty.

The cam cover has 2 gaskets, one that goes around the edge and one in the centre for spark plugs 2 and 3. There are 2 different kinds, rev1-2 and rev3-5. You can get both from Toyota.

The 10 bolts that hold the cam cover on have washers which are metal on 1 side and gasket on the other side. These washers should be replaced just like any other rubber gasket as they distort and seal to the cover and bolts when they get hot. Up to you whether you choose to replace the bolts or not - they were only crosshead on rev1-2 so you can replace those with rev3-5 bolts if you want.

There is a small bit of RTV sealant you have to apply to the cam cover where the 'humps' for the cams are. See the workshop manual for more info, but you should be able to see this when you take the cover off.

When you do the bolts up do them like you would do head bolts, i.e. go round them in order uniformly tightening them a little at a time, until the gasket is suitably squished. If you just do them up straight to specified torque from the workshop manual you will snap the lugs off the side of the cover.

The distributor controls ignition timing, so before you take it out you need to mark its position up with tippex or something so you can put it back in the same position, unless you have access to a timing gun in which case you can re-set the ignition timing from scratch when you put the distributor back on. It has a single o-ring where its drive gear goes through to the inlet camshaft. Again, available from Toyota, but you can use any old o-ring as long as it's the right diameter and thickness.
Last edited by toxo on Fri May 03, 2013 1:43 pm, edited 2 times in total.
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toxo
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Re: [Mk2] [Turbo] Changing rocker cover gasket

Post by toxo »

Parts:

Rev1-2 Turbo
Cam Cover Gasket #1 11213-88381
Cam Cover Gasket #2 11214-88381
Distributor O-Ring 90099-14090
Cam Cover Short Bolt 7 x 93270-26025
Cam Cover Long Bolt 3 x 90158-60010
Cam Cover Sealing Washer 10 x 90210-07001
Throttle Body Gasket if you need it 22271-88381

Rev3-5 Turbo
Cam Cover Gasket #1 11213-88480
Cam Cover Gasket #2 11214-88480
Distributor O-Ring 90099-14090
Cam Cover Short Bolt 7 x 91511-K0625
Cam Cover Long Bolt 3 x 90105-06202
Cam Cover Sealing Washer 10 x 90210-06012
Throttle Body Gasket if you need it 22271-88480
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the bear1986
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Re: [Mk2] [Turbo] Changing rocker cover gasket

Post by the bear1986 »

So Toyota should stock these parts then? Also do u know the part numbers for the dizzy cap and rotor arm and does the NA and turbo use the same parts? Sorry for the questions.
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toxo
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Re: [Mk2] [Turbo] Changing rocker cover gasket

Post by toxo »

Any Toyota parts desk can get you these parts within 3 days. They are all the same part numbers as the ST185 or ST205 Celica GT4 which was sold in Europe, so the parts are all held at the main distribution warehouse in Belgium. Whether your local dealer is happy blindly ordering part numbers from the internet or not is another matter :) There is a thread in the premium members section which lists a few 'import-friendly' dealerships.

I don't remember interchangeability between dizzy cap and rotor arm across revs as I've never owned an N/A so never had need to. You won't believe the cost of the dizzy cap but the pattern parts fail so quickly it's worth getting genuine if you can afford to. Best not to reuse the screws for the rotor arm as they are very soft and easily mangled. You may find the same of your dizzy cap bolts depending how old they are.

This is how I've read the parts catalogue...

Rev1 turbo & 3S-GE N/A:
Dizzy cap 19101-88363

Rev2-5 turbo & 3S-GE N/A:
Dizzy cap 19101-88364

All revs:
Dizzy cap bolts 2 x 90099-04977
Dizzy cap seal 19127-74040
Rotor arm 19102-74040
Rotor arm screws 2 x 90099-00200

I think that's right for Japanese models - it looks a bit like UK N/A cars may have carried on using the rev1 distributor cap on the rev2. Either way, the rev1 part number is for 5mm leads and the rev2+ is for 7mm leads.

If you have your frame number from the frunk (will start SW20000) the dealer's parts guy can plug this into the parts software and directly order the correct parts for your car. A lot of them don't know how to do this though, so they will say "We can't get parts for imports" or something along those lines. Sometimes all they need is a little gentle persuasion :)
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abovetherim
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Re: [Mk2] [Turbo] Changing rocker cover gasket

Post by abovetherim »

toxo wrote:

I think that's right for Japanese models - it looks a bit like UK N/A cars may have carried on using the rev1 distributor cap on the rev2. Either way, the rev1 part number is for 5mm leads and the rev2+ is for 7mm leads.


I think this is the wrong way around. The 7mm is rev1 and the 5mm is rev2 +
Luke820
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Re: [Mk2] [Turbo] Changing rocker cover gasket

Post by Luke820 »

Great thanks mate! Sorry I didn't see that anybody replied on my post hence the new post i did lol! Finally a clear answer on the issue!
GTMatt
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Re: [Mk2] [Turbo] Changing rocker cover gasket

Post by GTMatt »

Old post I know but have a question that applies, is this a suitable sealant for the three hi-lighted areas when installing cam cover?

http://www.halfords.com/workshop-tools/ ... AugA8P8HAQ

Cheers
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