coolant issue need help

ChadxScene · 05-06-2013, 04:21 PM

I'm new to Supras, just bought a 1987 Toyota Supra Turbo. Got it pretty cheap, but it has some issues. the main one holding me up right now is this coolant issue. Here are some picture of where the coolant is leaking out of. I've been trying to figure out what it is or what it was supposed to be for the past few days.

This is a picture to give you an idea of where its at

This is a picture of what is leaking.

Yes I know my engine is dirty, I just replaced valve cover gaskets to stop an oil leak, I haven't gotten a chance to clean the engine up all the way, just trying to get it running properly.

cre · 05-06-2013, 11:12 PM

It's supposed to be capped on LHD models, on RHD models the other side is capped.

ChadxScene · 05-06-2013, 11:19 PM

So pretty much I just need to replace the cap and I'll be good?

ChadxScene · 05-06-2013, 11:19 PM

Also, where would be place I could find said cap?

btwilson86 · 05-07-2013, 05:17 AM

Yup, just need to replace the cap. You can probably get one from Toyota, you may be able to find one at a parts store. Dorman / Motormite usually have some heater hose caps in a blister pack in the "Help!" section

cre · 05-07-2013, 03:43 PM

Make sure it's not a vacuum cap and also if it's after-market try to find one that's fabric reinforced.

Bru · 05-08-2013, 02:21 AM

I just got one at the dealer the part number is 90339-16001. It's simply called a plug. The cost was $4.14 You may be able to stop the leak by tightening the clamp a bit. Looks like the oil has gotten to it and it may be deteriorated. One thing to hope for is that the pipe itself is not corroded and thin walled. I have seen some rotten ones. You need to get the oil leak under control or at least wrap the new plug with some aluminum foil.

ChadxScene · 05-11-2013, 06:47 PM

I got 2 of them thru the shop i work at for $3.00 now its fixed and driving again. The oil leak is fixed. when i bought the car a month ago the valve covers were leaking bad. Thats the first thing i fixed tho. now its just time to sit down and start repairing everything thing else.

Bru · 05-13-2013, 11:23 PM

The valve covers have always been a source of problems for oil leaks. I have ended up using stainless steel Allen head screws with a drop of red Loctite on the threads to keep them from coming loose again. It makes it harder to get them out after the Loctite has set, that's why a Allen head screw works best. I also use a thin layer of black silicone to seal the valve cover gasket in the groove and on the contact side for added insurance.
Another place oil can leak are the spark plug valley plate 14 mm hex plugs if oil is collecting around your spark plugs after sealing the valve covers. A dab of silicone works here as well then torque them down. Keep an eye on your front and rear coolant by pass 90-degree elbows. When they get old or oil soaked they can become soft and rupture. I check by giving them a little squeeze when the engine is cold. It doesn't hurt to get a rag out and start cleaning up to your engine area. That way you can spot new trouble easier plus it looks good!

MA70-3.0GT · 05-14-2013, 10:33 AM

Quote:

Originally Posted by Bru

"snip".....It doesn't hurt to get a rag out and start cleaning up to your engine area. That way you can spot new trouble easier plus it looks good!

Agreed, plus with the oil soaking it's had recently now is the best time as the 25+ years of gunk buildup is soft and easily got rid of at the moment. A few thousand miles of no leak & it'll be baked on again...

Gotta love how modern the 7M engine still looks when its all clean & sparkly

05-06-2013, 04:21 PM	#1
ChadxScene Stock Join Date: May 2013 Location: Woodbridge, Virginia Posts: 5	coolant issue need help I'm new to Supras, just bought a 1987 Toyota Supra Turbo. Got it pretty cheap, but it has some issues. the main one holding me up right now is this coolant issue. Here are some picture of where the coolant is leaking out of. I've been trying to figure out what it is or what it was supposed to be for the past few days. This is a picture to give you an idea of where its at This is a picture of what is leaking. Yes I know my engine is dirty, I just replaced valve cover gaskets to stop an oil leak, I haven't gotten a chance to clean the engine up all the way, just trying to get it running properly.

05-06-2013, 11:12 PM	#2
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	It's supposed to be capped on LHD models, on RHD models the other side is capped. __________________ If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum. If you're so inclined I'm always more than happy to accept tips via PayPal. Tip Jar --->

05-07-2013, 05:17 AM	#5
btwilson86 Super Moderator Join Date: May 2007 Location: Billings, Montana Posts: 1,034	Yup, just need to replace the cap. You can probably get one from Toyota, you may be able to find one at a parts store. Dorman / Motormite usually have some heater hose caps in a blister pack in the "Help!" section __________________ 1989 7MGTE R154 Targa Top White Package w/Blue Interior Driftmotion 57trim CT26, Upgraded Intercooler, 2.25" Hard Pipes, 3" Turbo Back Exhaust with Test Pipe, HKS VPC w/GM 3 bar MAP sensor, APEXi S-AFC, Walbro 255lph fuel pump, ProSport EVO Series Boost / Fuel Pressure / AFR gauges, Lotek a Pillar Gauge Pod, HKS Type 0 Turbo Timer, Eibach Lowering Springs, Tokico Illumina II TEMS struts, custom powder coated Motegi Racing TrakLite wheels

05-07-2013, 03:43 PM	#6
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	Make sure it's not a vacuum cap and also if it's after-market try to find one that's fabric reinforced. __________________ If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum. If you're so inclined I'm always more than happy to accept tips via PayPal. Tip Jar --->

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05-06-2013, 11:19 PM	#3
ChadxScene Stock Join Date: May 2013 Location: Woodbridge, Virginia Posts: 5	So pretty much I just need to replace the cap and I'll be good?

05-08-2013, 02:21 AM	#7
Bru Bone Stock w Upgrades ;-) Join Date: Apr 2010 Location: Tampa Bay Posts: 210	I just got one at the dealer the part number is 90339-16001. It's simply called a plug. The cost was $4.14 You may be able to stop the leak by tightening the clamp a bit. Looks like the oil has gotten to it and it may be deteriorated. One thing to hope for is that the pipe itself is not corroded and thin walled. I have seen some rotten ones. You need to get the oil leak under control or at least wrap the new plug with some aluminum foil.

05-11-2013, 06:47 PM	#8
ChadxScene Stock Join Date: May 2013 Location: Woodbridge, Virginia Posts: 5	I got 2 of them thru the shop i work at for $3.00 now its fixed and driving again. The oil leak is fixed. when i bought the car a month ago the valve covers were leaking bad. Thats the first thing i fixed tho. now its just time to sit down and start repairing everything thing else.

05-13-2013, 11:23 PM	#9
Bru Bone Stock w Upgrades ;-) Join Date: Apr 2010 Location: Tampa Bay Posts: 210	The valve covers have always been a source of problems for oil leaks. I have ended up using stainless steel Allen head screws with a drop of red Loctite on the threads to keep them from coming loose again. It makes it harder to get them out after the Loctite has set, that's why a Allen head screw works best. I also use a thin layer of black silicone to seal the valve cover gasket in the groove and on the contact side for added insurance. Another place oil can leak are the spark plug valley plate 14 mm hex plugs if oil is collecting around your spark plugs after sealing the valve covers. A dab of silicone works here as well then torque them down. Keep an eye on your front and rear coolant by pass 90-degree elbows. When they get old or oil soaked they can become soft and rupture. I check by giving them a little squeeze when the engine is cold. It doesn't hurt to get a rag out and start cleaning up to your engine area. That way you can spot new trouble easier plus it looks good!