BHG/ idle cool/ high speed over heat

[Oper8or]

Well, its been a while but I'm back. Yes me, the yard gnome. But anyway. I see the problem cramerizking has been having with overheating. Mine has been doing the same for about 5 days. Water pump, fan clutch, thermostat, belt, and flushing like crazy then replacing the clutch fan again solved none of this. Come to find out I now have a blown head gasket. So I am in the same boat. So I have to put the limited skills I have to work to get it running so I can go to school in the fall. So research is at hand and any tips you guys have will be appreciated.
What seems to have happened is one of my hoses clogged a while back. It mildly overheated. From then on its been a battle. The overheating caused the thermostat to go bad in the process. Hot after driving for about 20 minutes. didnt matter the speed. Then after replacing the rad cap, again, it started missing after running for 20 minutes. Not at idle, only after driving it. So that leads me to believe the gasket blew between the water jacket and the cylinder. Which is better then getting water in the oil. At least that might not make it a complete rebuild.

 

[Blue87T(Dan)]

Sorry to hear that man. I was wondering where you were at. The avatar is unique to say the least!

Hope you get it all sorted out.

Dan

 

[Oper8or]

Thanks Blue87T(Dan). I will get it worked out. I'm trying to find a race head shop today and probably for the rest of the week. I went through the llist of things that I need for the BHG replacment. Lots of things. So it will have to be bought a little at a time but it will get done.

 

[lagged]

do your self a favor, wherever you bring your head print out the toyota specs for it . all torque specs and whatever else you can think of and hand it to the guy and the shop.

then, after you get your head back check EVERYTHING. the vavle clearences, the torque on the bolts for the cam journal caps, CORRECT cap locations etc etc.

 

[Oper8or]

Well.. I wouldnt really know what to visually look for. Thanks for the advice though. I will look at the TRSM and see what I can find. Dont know how to check valves. So I'm screwed on that. But I can do a visual on the rest. Maybe Drake can help me out. I'll see. If not. I'm on my own.
One question. I've heard the debate on gaskets. I'll look at what everyone is using. I just want to know if it would be ok to go stock gasket since its not turbo and it doesnt get driven real hard. Not saying I dont have a lead foot.. I do. Its just not under stress all the time. Just asking for your opinions.

 

[IJ.]

Oper8or: Check the head for errosion under the copper rings at the water passages, you might have to have the head surfaced then check the same area on the block if it's ok and the block is flat there's no reason why a stock gasket won't work!
(I did 100,000+ KM's after doing much the same excluding surfacing the head)

 

[Oper8or]

Thanks IJ. That is good news. I dont have the area (garage) to pull the engine and have the block done as well. I hope I can have this done soon. I'm going to start pulling the head this weekend when it warms up. I'm taking pictures of it as an added precaution. I'm going to take it one step at a time. Not rushing this so I dont botch it up.

 

[Blue87T(Dan)]

Summit racing has a good price on ARP studs or bolts for the 7M-GTE. I would assume they would work in your N/A. Double check though.

With those, like IJ said, the stock composite gasket should be fine.

Dan

 

[Oper8or]

Good. I'll check it now. Summit here I come. I'm hoping it doesnt have more damage then expected. Thanks for the input guys.

 

[Oper8or]

http://www.supramania.com/forums/showthread.php?t=251

After reading this. I now know for sure what it is. Water to cylinder. I'm STILL looking for a shop around here. Man does no one do good work anymore? I can find a single shop that does race prep or anything locally with him chewing and spitting on an old block setting in the corner of the shop that is going into a circle track car.
Side note. No I've never torn a Sup down. The experience I have is with vw's. Old ones. I'm kinda nervous about digging into and screwing something up. Anyone have any advice? I've searched the forums and found a few things. I'll be checking Jonez's site as well.

 

[IJ.]

Op: It's not too hard and you have a LOT of help at your fingertips here!

 

[Oper8or]

Thanks man. Drake has offered advice as well. I'm going to look for the head bolts online tonight. After tomarow.. since the weather has gotten better, I am going to start taking it apart. With no garage to do this in. I have to find a way to keep everthing sorted. Any ideas on that? I thought about getting some cheap 'ol tupper ware like containers and using them and labeling them as to what bolt goes where. Plus I found a diagram of the vacuum lines today on the forums. This place is a load of info. Still HAVE NOT found a worthy shop. I called a buddy of mine that works at the local rental shop. He said he uses the one next to the NAPA. Well, I know the guy who owns it. Went to school with him. Hes a good machinest. I said good. Not what I need. I would trust him with a sb chevy engine. But not this head. So its a no go there. I heard of a machine shop up near Knoxville that does race prep work. I'm wondering if these are the better choice to go with. I'll take a drive and find out the name and number. If they do the work. I'll post pics and thier shop name and number so others know there is one here.

Stephen :bigthumb:

 

[IJ.]

Ziploc baggies

 

[Oper8or]

Ziploc baggies

Smart *&%. I didnt even think of that. Thanks man!

 

[e90suprat]

oper8or: I just did a BHG myself and it wasnt as bad as I thought it would be. Taking pictures is a great idea, also label all your wires and hoses so you will know where they go. Another thing to consider would be buying a rebuilt head from someplace like cylinder heads international or clearwater cylinder heads. You will have alot less downtime that way, they send you a new head, and when you get yours off, you put it in the box the new one came in and send it back to them. Mine cost $500 including the shipping, and they got it to me fast. If you would like phone#'s, let me know. Hope this helps. Ed

 

[IJ.]

Op: LOL now I just have to start listening to my own advice
(I have a bunch of yellow plastic boxes full of left overs!)

 

[Oper8or]

oper8or: I just did a BHG myself and it wasnt as bad as I thought it would be. Taking pictures is a great idea, also label all your wires and hoses so you will know where they go. Another thing to consider would be buying a rebuilt head from someplace like cylinder heads international or clearwater cylinder heads. You will have alot less downtime that way, they send you a new head, and when you get yours off, you put it in the box the new one came in and send it back to them. Mine cost $500 including the shipping, and they got it to me fast. If you would like phone#'s, let me know. Hope this helps. Ed

Heck yes. Pm me the # of the company. I will call them asap and get this thing running. Please. Thank you for the help. I'd be lost without the people on these forums :icon_bigg

 

[e90suprat]

clearwater cylinder head: 1-800-572-1963
international cylinder head: 1-800-942-4503
I used international myself, they had alot of the 7mgt heads in stock, but clearwater is less expensive if they have one. Good luck. Ed

 

[Oper8or]

Thank you for the info. Now I can call these guys and get rolling.
I went out and started taking pics of it today. Well, something in my gut told me not to attempt the swap. I have no place to work on it. I dont have all the tools I need. And knowing me I would severly screw something up. I dont get it. I'm brave enough to tear into anything with wires. Smack down brakes, carbs, anything that is external on the engine or car. But when it comes to mucking up the inside. I dont dare. I used to be good at this. WTF. So in my awe of being such a loser. I am opting to chicken out and have it worked on. I know.. I'm a panzy. I just want it to run the way it was intended to run when its back together. Now if I had a garage and all the tools I need. Np.. I would have the space I need to do it. But I am so sick of laying in the dirt working on cars. I know some of you have it worse. I've been in worse myself. Guess I will call the shop on Tuesday. "mark me as a chicken i guess" :kloguck:

 

[Oper8or]

Well shes in a shop. A lot of rain here has forced me to do that. No garage and no family or friends with one. So, it willl be done soon. Plus hes certified Toyota mechanic. That does help my confidence. But now I'm single again, yeah, she left. The kids took it hard. But we are ok.