checking out an 86 mk3 tomorrow

cvbikeguy · 11-26-2009, 02:29 AM

ok i feel like i noob....cause i am. sooooooo tomorrow or friday i shall take the head off anf hopefully send to the machine shop.

cre · 11-26-2009, 02:46 AM

When you remove the head bolts you need to clean out any and all oil in the hole and any debris which may have collected there; Failure to do so may prevent the allen bit from entering the opening completely.

If you cannot get a bolt out all the way using constant steady pressure AND the socket is in all the way you can try: Pounding downward on the head of the bolt a few times with a rubber mallet; Use a breaker bar and while you hold it FIRMLY in place have someone tap the end of the handle several timed with a hammer; AND, spray the area thoroughly with a GOOD penetrating oil (WD-40 does not count as a good penetrant).

As for the bolts you've already stripped, go to the hardware store and try to find an allen bit or regular allen wrench that's just a *tiny* bit larger than yours, it'll most likely be an SAE size unless you've got a shop in the area which can order .5mm bits. Take it home and tap it in with a hammer... you know the drill from there. Some people have luck with easy outs; Grinding the head off the bolt usually results in some heavy gouges in the mating area directly under the bolt head and as such getting an accurate torque thereafter is unlikely without having the area machined.... not to mention all the debris you'll have to worry about flushing out of the block. Note: If all you can find that'll fit is a regular L shaped allen wrench you can just cut it off and slip it into a regular socket.

If I think of anything else I'll let you know.

EDIT: Oh, and don't be afraid to use a LOT of penetrant... it's cheap enough. Soak the bolts, wait an hour, soak again, wait another hour, soak again.... repeat a often as you wish, then let it sit for a few hours before going at it again. When you do go at it again make sure the allen is going in all the way before you try to remove the bolt.

cvbikeguy · 11-26-2009, 02:59 AM

haha im glad you didnt understand my stupidity. so i was actually trying to take off the hex bolts in the middle of the head.

then after frantic searching i realized these arent the head bolts.................

the build goes on.....

cre · 11-26-2009, 03:56 AM

Ah, well that is good. I don't know why people seem to have so much trouble with those. Good luck with the real head bolts when you do get to them and remember to take them out in the correct order!

cvbikeguy · 11-26-2009, 04:55 AM

Quote:

Originally Posted by cre

Ah, well that is good. I don't know why people seem to have so much trouble with those. Good luck with the real head bolts when you do get to them and remember to take them out in the correct order!

theres an order?

cre · 11-26-2009, 05:28 AM

Yes, there's an order (for both installation AND removal)... there's an order to the cam bearing caps as well.

Start here and keep reading: http://www.cygnusx1.net/Supra/Librar...ection=EM&P=32

cvbikeguy · 11-28-2009, 05:53 PM

soooo we got the head off and the gasket actually doesnt look too bad. but then again theres alot of crap in my cylinders tho. pics......

man that TSRM helps alot. thanks. so yea everything looks pretty good. oh well time to continue with the build. timing cover, alternator brackets

11-26-2009, 02:46 AM	#2
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	When you remove the head bolts you need to clean out any and all oil in the hole and any debris which may have collected there; Failure to do so may prevent the allen bit from entering the opening completely. If you cannot get a bolt out all the way using constant steady pressure AND the socket is in all the way you can try: Pounding downward on the head of the bolt a few times with a rubber mallet; Use a breaker bar and while you hold it FIRMLY in place have someone tap the end of the handle several timed with a hammer; AND, spray the area thoroughly with a GOOD penetrating oil (WD-40 does not count as a good penetrant). As for the bolts you've already stripped, go to the hardware store and try to find an allen bit or regular allen wrench that's just a tiny bit larger than yours, it'll most likely be an SAE size unless you've got a shop in the area which can order .5mm bits. Take it home and tap it in with a hammer... you know the drill from there. Some people have luck with easy outs; Grinding the head off the bolt usually results in some heavy gouges in the mating area directly under the bolt head and as such getting an accurate torque thereafter is unlikely without having the area machined.... not to mention all the debris you'll have to worry about flushing out of the block. Note: If all you can find that'll fit is a regular L shaped allen wrench you can just cut it off and slip it into a regular socket. If I think of anything else I'll let you know. EDIT: Oh, and don't be afraid to use a LOT of penetrant... it's cheap enough. Soak the bolts, wait an hour, soak again, wait another hour, soak again.... repeat a often as you wish, then let it sit for a few hours before going at it again. When you do go at it again make sure the allen is going in all the way before you try to remove the bolt. Last edited by cre; 11-26-2009 at 02:58 AM.

11-28-2009, 05:53 PM	#7
cvbikeguy 3" Exhaust Join Date: Nov 2009 Location: Castro Valley, CA Posts: 248	blown head gasket? soooo we got the head off and the gasket actually doesnt look too bad. but then again theres alot of crap in my cylinders tho. pics...... man that TSRM helps alot. thanks. so yea everything looks pretty good. oh well time to continue with the build. timing cover, alternator brackets Last edited by cvbikeguy; 11-28-2009 at 07:24 PM. Reason: mispelling

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Lower Ball Joints - Checking here first	Grandavi	MKIII Supra	3	09-20-2008 04:04 AM
Picking up my 89 tomorrow	8uwav6	Show n Tell	2	03-31-2008 08:08 PM
Checking Thermostat	scruffboy	Non-Generation Specific Questions	6	03-09-2006 05:49 PM
Supra Noob checking in from Florida	PalmCoastMk3	Non-Generation Specific Questions	1	12-23-2005 05:08 PM
Supra Newb Just checking in	Razor	Non-Generation Specific Questions	1	12-21-2005 04:15 AM

11-26-2009, 02:29 AM	#1
cvbikeguy 3" Exhaust Join Date: Nov 2009 Location: Castro Valley, CA Posts: 248	ok i feel like i noob....cause i am. sooooooo tomorrow or friday i shall take the head off anf hopefully send to the machine shop.

11-26-2009, 02:59 AM	#3
cvbikeguy 3" Exhaust Join Date: Nov 2009 Location: Castro Valley, CA Posts: 248	haha im glad you didnt understand my stupidity. so i was actually trying to take off the hex bolts in the middle of the head. then after frantic searching i realized these arent the head bolts................. the build goes on.....

11-26-2009, 03:56 AM	#4
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	Ah, well that is good. I don't know why people seem to have so much trouble with those. Good luck with the real head bolts when you do get to them and remember to take them out in the correct order!

11-26-2009, 05:28 AM	#6
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	Yes, there's an order (for both installation AND removal)... there's an order to the cam bearing caps as well. Start here and keep reading: http://www.cygnusx1.net/Supra/Librar...ection=EM&P=32