So I went to do a couple of jobs on my 88 this afternoon and ran into some problems. The first of which is on changing my CAT. The two aft bolts are normal 14mm bolts and nuts. The problem I am having is that the forward two seem to be 14mm into a nut plate is this correct? They are completely seized and now I have stripped one of them. Any recommendations on how to tackle getting these out?

The second is on my M/T. Am I correct that the drain plug has a bolt head size of over 19mm(this is the biggest I have)? Or am I looking at the wrong bolt? As always thanks for the help guys.

 

My guess is that you could cut the frozen bolts off, (angle grinder,zip wheel). Your service manual should identify the drain plug. Ps before you drain it make sure you can get the filler bolt off first. Always filler bolt off first. did I sat always.

 

Righty tighty lefty loosey... but nah soak the non striped ones in pb blaster or brake fluid if you don't have pb and smack them with a hammer and punch a few times

 

heat helps

 

For the cat...the bolt is a 10mm x1.25 (thread pitch) approximately 35mm long, four of them on the cat. The nut plate isn't available anymore. You should have heated the female threaded portion first..oh well. Heat is your friend for rusted bolts, plus smack the head of the bolt a couple of times with a hammer. MAP gas heats better than propane and penetrating oil (Acetone and ATF).
If you've stripped one out, just don't over think it and make the job worse that it is. Just cut the bolts off with a cut off wheel.

You can replace with regular nuts/bolts instead to the threaded plate thing. You might replace all bolts and nuts with stainless. Not as hard as grade 5 bolts but adequate. Back the nuts up with flat and lock washers.

The reason I know this is because I recently dropped the down pipe while replacing the exhaust manifold gasket and the three round gaskets.

 

All 4 of my bolts have 14mm heads...

 

My guess is one of the two of yalls trucks had the bolts replaced prior to yall taking ownership of the trucks

 

I'm not sure. Don't 10mm diameter bolts have a 14mm head? At least, I think that's what mine were.

Also, mine were rusted solid. I used the propane torch and a hammer trick to good effect. Of course, it snapped the bolts, but I got them out!

 

M10x1.25 does not mean it takes a 10mm wrench/socket. That's a common misconception.

http://www.boltdepot.com/fastener-in...-diameter.aspx

 

Maybe what I should have said was mine were M10 bolts with a 14mm head and left it at that.

Thanks for clarifying.

 

Sorry, I meant to say that an M10 doesn't take a 10mm socket. You were right. IIRC, M10s do take a 14mm wrench.

I just edited my above post to avoid confusion.

 

was going to post the correct sizing of bolts but you guys got it covered...

 

Almost, but not quite. The M10s on Toyotas take a 14mm wrench, but standard M10s take a 16mm wrench. Toyotas (and most other Japanese vehicles) use JIS bolts, which have a smaller head. http://www.engineeringtoolbox.com/me...ze-d_1458.html

What this means if you break a plain-ole 10mm bolt and trot down to your hardware store to buy a replacement, you'll end up with a bolt that takes a different wrench size (and lots of metric wrench sets don't have a 16mm!)

 

How about some pictures,,,,,,,,

 

On my end?

 

Another question fellas. Do I need gaskets for my fill plug and drain hole? I also still haven't gotten anybody to tell me what size this huge drain plug is. I don't' want to have to buy a whole new set of larger size metric wrenches. I would prefer to just have to buy the one from harbor freight or somewhere.

 

I bought a set of impact sockets from Sears many years ago. They are six-point, which helps keep from rounding off your bolts. I had already broken two regular sockets on a crankbolt, so the impact sockets were well worth the price to me. I think it was something like $25.

The other big advantage of that set, which I did not foresee, is that it goes up to 27mm. That has made it invaluable for those few times that I come across a bolt too big for my regular wrenches.

 

Thats not bad at all. Maybe I'll do that. I need to go get a set of Knipex for getting these stripped and seized bolts out anyways. Good call bro thanks.

 

Anybody got a link for the proper crush washers for the drain and fill holes?

 

I don't know the metric size, but I use a 15/16" socket for the drain and fill plugs on my transmission. Mine's a W56-C for the 89, yours should be a W56-B, but I would think the plugs would be the same. As far as the crush washers, you can probably pick them up at a local Advance or NAPA.