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The mkiv Supra Owners Club

Oil Leak, help and pointers....


supra_ufo

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It's the exhaust gas control valve. The bolts holding it to the manifold are often seized and prime candidates to shear off, only remove if vital. I'd tow it to a ramp and get a pro to sort it out, there should be no need to remove it at all, but there again, if you can't get purchase on the now smaller length drain stud.....If it will come off there are no real implications at all, it's not a grenade! I would say it's approaching engine out time to do a proper repair job. Now you can see why I won't quote fixed prices on some jobs :) It might be easier and safer to remove the valve's sandwich plate by undoing the three nuts on the through studs. You may find them tight.

 

I am still determined to sort this problem out, I created it but then again I don't want to make it worse lol

 

On another note I managed to drain the coolant and remove the bottom & top hose ready for new ones

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Just an update, got the bolt off! Put the nut back on and then another, jammed them together and was able to twist the bolt off. A mechanic gave me the idea...

 

It appears there is no gasket on at all or any paste (see pic) I have searched on http://www.toyodiy.com & http://www.utoyot8.com for the part number for the gasket. Does anyone know what it is? Or help :innocent: I will be visiting Toyota mid week so could ask them but I have a feeling they will want chassis number etc and since mine is an import it wont come up :-/

 

attachment.php?attachmentid=163309&stc=1&d=1358718937

 

 

The water return pipe seems like it just had paste on it, I believe I have found a part number for the gasket though (16347A)

attachment.php?attachmentid=163310&stc=1&d=1358718937

 

Does anyone know the part number for the 12mm bolt as pictured on page 3?

IMG_8261.jpg

IMG_8253.jpg

Edited by supra_ufo (see edit history)
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Just ring the Toyota dealer up and he'll find the number, you'll have to ring him to place the order anyway! Same parts on a UK car, and if they won't look up an import VIN number go to a dealer that wants the business, most are struggling to meet their parts targets, and need to pull their fingers out. And take those damned gloves off, you can't work properly dressed like you are off up the Eiger :) I suspect two studs from an N/A head casting will do, not sure what they hold on, possibly a water pipe, I have one for stripping, I'll try and remember to look what they are actually for. If my gaskets are still in their Toyota bags I'll write down the part number if you get really stuck.

Edited by Chris Wilson (see edit history)
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Just ring the Toyota dealer up and he'll find the number, you'll have to ring him to place the order anyway! Same parts on a UK car, and if they won't look up an import VIN number go to a dealer that wants the business, most are struggling to meet their parts targets, and need to pull their fingers out. And take those damned gloves off, you can't work properly dressed like you are off up the Eiger :) I suspect two studs from an N/A head casting will do, not sure what they hold on, possibly a water pipe, I have one for stripping, I'll try and remember to look what they are actually for. If my gaskets are still in their Toyota bags I'll write down the part number if you get really stuck.

 

:love:Chris!

 

The gloves are for safety (i work for an engineering company and have seen some horrible things) and it was like 0-5c in my garage too!

My local dealer is not that far and the parts dept close at 530 so it will have to be a friday for me when i get a chance to leave work on time..

 

thanks

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I went to see Toyota yesterday with my old stud and nut and printed pictures showing gaskets and parts I needed. The bloke said he needs a few days to speak to colleagues. He didbt want to order the parts as they are non returnable. Iky ill check your part numbers. The stud is the difficult one. Chris are they for sale? :-) how far are you from Ellesmere Port?

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  • 2 weeks later...

thanks for all the help guys. Replacing those gaskets did the trick. Whilst I had drained all the coolant I decided to replace top and bottom hoses and replace the thermostat with a Whifbitz 72c one. Now I need to put it all back together and start a new thread of another possible issue lol Good shout on the gasket Iky. Feels great fixing something yourself!

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Why on earth would you want to fit a cold `stat?

 

Glad you got it sorted!

 

"Garage Whifbitz 72 degree thermostat for the 2JZ & 1JZ engine.

 

The lower termperature thermostat will help to reduce & maintain a lower coolant operating temperature, a great modification for any tuned Supra, especially for anyone who wants to track there car."

 

Saw it on sale new in the For sale section and it was cheaper than the OEM so I bought it... My Supra is not tuned yet but I plan a BPU....

Are these bad for the car?

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They are for very specific situations, the engine was mapped at a certain temperature, and the oil system was designed to achieve a running oil temp in harmony with a given water temp (the two are intrinsically linked due to the Modine cooler under the oil filter). You will not drive condensation out of the oil, the engine will run on the wrong part of the map for design performance, economy and emissions, and you may well see excess engine wear. Cold `stats are STRICTLY full race only, and often even then they are not what you want.

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They are for very specific situations, the engine was mapped at a certain temperature, and the oil system was designed to achieve a running oil temp in harmony with a given water temp (the two are intrinsically linked due to the Modine cooler under the oil filter). You will not drive condensation out of the oil, the engine will run on the wrong part of the map for design performance, economy and emissions, and you may well see excess engine wear. Cold `stats are STRICTLY full race only, and often even then they are not what you want.

 

Beat me to it :)

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They are for very specific situations, the engine was mapped at a certain temperature, and the oil system was designed to achieve a running oil temp in harmony with a given water temp (the two are intrinsically linked due to the Modine cooler under the oil filter). You will not drive condensation out of the oil, the engine will run on the wrong part of the map for design performance, economy and emissions, and you may well see excess engine wear. Cold `stats are STRICTLY full race only, and often even then they are not what you want.

 

:(

 

Flush the coolant round 3...

 

Thanks & no thanks Chris ;)

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