Help me plug my hole

[Dieseler]

I took off my manifold to determine where the rad fluid was leaking from and this is what I found , it looks like one of the casting holes has produced a leak.
What are my options to plug it,I have limited tools where I am right now,tap and plug is the best option is there any other options,anyone know the size of the hole so I only have to buy one tap bit and plug.

Yes I will tap and plug the others just in case.

 

[lostmarbles]

If that is the colour of your coolant no wonder you've got troubles Dieseler! I wouldn't run any vehicle of mine with coolant looking like that. (Or is that just the colour of what's leaking out and the stuff in your radiator looks much better?)

(One of the reasons I like to run GREEN coolant is because it's colour is not at all similar to RUST.)

I guess your leak is between Nos 3 & 4 cylinders on the head. IE here ........(when looking at my B engine):



Here's a pic of the B/2B head gasket too. I was going to work out which part was in the vicinity of your leak but it is too difficult for me now what with the MUD site malfunctioning so much lately (preventing me from searching information easily).



Actually I took this last photo a few days ago for comparison reasons. (The genuine Toyota MLS gasket is at the top and one from Engine Australia on the bottom).


A temporary "fix" with a plug sounds reasonable to get you home or wherever.

(I would just plug the one that's leaking and ignore the others.)


PS. Is anyone else finding that some pages from MUD regularly refuse to load. (I just move on to something that will load and then go back later ... but it is frustrating!)

 

[Dieseler]

The fluid in the rad is not that color just whats leaking out , most of these JDMs are similar something to do with them not using anti-freeze,after seeing the rust color I have decided to do a full flush when I get back.
Looking at your pics of the gaskets I would stick with the top one it has more metal around the cylinders.

 

[cruiserheads]

If you look in those holes it appears to be a round sleeve going up and down. Maybe a sleeve for the head bolt. Sleeve could have rusted through. Do you have any coolant in your oil? If not then plugging it should work. I would keep an eye out for coolant in your oil after plugging it as it may force the coolant in another direction. I have 2 used heads from B motors if you need to replace the head and if the B head is the same.

Neil.

 

[lostmarbles]

....Looking at your pics of the gaskets I would stick with the top one it has more metal around the cylinders.

Weight is often a good guide to quality too. And I can readily feel the extra weight in the OEM gasket.


Bottom = OEM MLS (multilayer steel) in this photo-comparison:






PS. Fitting a B-head may work if it comes to that. After all, someone once posted to say they were running a 3B head on a B-engine ... which sounds to me to be far more unlikely to succeed.

 

[Kynot62]

I noticed those holes when I put the head back on my 3B. Thats not a sleeve you are seeing but the side of the head bolt. I would make a small wager that you have a leaking head gasket.

Tony

 

[RufusTheDufus]

Should there be a freeze/welsh plug there?

 

[Dieseler]

Yeh Kynot62 that is where the head bolt passes through the head which probably means the head gasket is on its way out , at this point I am going to shallow tap the hole and plug it so I can make it home , I have no water in my oil and not sure if I will have the head bolt should seal off any water on both ends of the bolt assuming the gasket is only leaking from the water journal to the head bolt hole in the gasket.

 

[Kynot62]

Yeh Kynot62 that is where the head bolt passes through the head which probably means the head gasket is on its way out , at this point I am going to shallow tap the hole and plug it so I can make it home , I have no water in my oil and not sure if I will have the head bolt should seal off any water on both ends of the bolt assuming the gasket is only leaking from the water journal to the head bolt hole in the gasket.

If I remember correctly the only place the bolt seals is at the head gasket, I think the threads go into a blind hole so there is nothing to seal at the bottom. If you can just limp your way home without plugging that hole.

I once drove from Tennesee all the way back to California with leaking freeze plugs in a Ford Pick Up. To help control the leak, release the radiator cap one notch. The cap will stay on but not allow much pressure to build in the system reducing the leak. Keep extra water with you as the motor will want to boil off the water sooner and you will have to drive slower to avoid overheating.

Rufus Nothing I found shows a freeze plug going into that hole. I thought this was odd but mine doesn't leak. Maybe it's on purpose by design.

Tony

 

[lostmarbles]

I'm at work at the moment with an "unfriendly" computer. Otherwise I'd put up some more images for you right now Dieseler.

But if you look at that picture I posted of the B/2B head gaskets, I think the 8 larger holes that are in line at the top of each gasket are where the pushrods (for the rockers) pass though.

So if you look between the first 2 pushrods on the left you'll see two smaller holes. I think the top one of those is the headbolt-hole through which that rusty water is escaping and the one directly below it (next to the bore) is the coolant passageway where the water is coming from.

So .... having worked this out, I now change my mind and recommend NOT plugging the hole.

The reason for this change of mind is .....Look how close the bolthole is to the pushrod holes! (So plugging that hole is very likely to force the coolant to burst into one of those!)



PS. Have a look at Amaurer's 3B in post #30 here:

https://forum.ih8mud.com/diesel-tec...c-b-3431cc-3b-parts-interchangeability-2.html

 

[Dieseler]

Are the push rods on the injector side of the block or the exhaust side ,if the injector side I will be good since there is only the head bolt and the water journal.

Lostmarbles the gasket you refer to as a B/2B headgasket are you sure they are the same I cant find reference to them being the same part number is the one you are using for a B motor which is what I am assuming since you are in NZ which only had the B motor.
Has anyone out there done a match up with the B against a 2B gasket I am pretty sure the 3B will not fit since it has a bigger bore, but the B and 2B should be similar in bore IIR its the stroke that is different.

 

[lostmarbles]

Are the push rods on the injector side of the block or the exhaust side .../

Exhaust side.

Here .... I've turned the gasket around and labelled "front" and "rear":



Edit. 5August 10am kiwitime - Replaced this image with one showing the head gasket the right way up!

I've also pointed to the source of your leak. (I'm back home again now so I can do this easily.)

...Lostmarbles the gasket you refer to as a B/2B headgasket are you sure they are the same I cant find reference to them being the same part number is the one you are using for a B motor which is what I am assuming since you are in NZ which only had the B motor.
Has anyone out there done a match up with the B against a 2B gasket I am pretty sure the 3B will not fit since it has a bigger bore, but the B and 2B should be similar in bore IIR its the stroke that is different.

I agree! The bigger bore of the 3B means that head gasket should be incompatible.

Background: In the last month or so, I finally found a Toyota Dealer here in NZ (but not in my city) who is clued-up, does business on the Internet, and is easy-to-deal-with. When he told me gasket 11115-56120 would fit my BJ40 I didn't believe him because my research suggested it to be a 2B headgasket and for a much later model (1984 to 1989 as I recall). Anyhow, he ended up being right (as you can see in my photo-comparison with the gasket I bought from Engine Australia some years ago).

Google the part number and you should get what I did!

So I think it should surely fit your engine ..... But see what number your local Toyota dealer comes up with. (I believe this gasket should be the only choice open to your dealers now because I think it supersedes all the older numbers for a B or 2B engine.)

On the bright side, the cost was significantly less that what I hear people paying in USA/Canada for Toyota MLS 3B gaskets too! ($NZ105)

 

[Snailtrail]

I have seen those 4 holes in the past, thought they were odd, but thought nothing more of it. After reading your post, and seeing the photo of coolant leaking out i decided to have a closer look.

Apart from the 3B in my wagon, the only other 'B' type engine i have at the moment is a 14B-T in bit's. I realise there is a bit of a production gap between the two engine's, but the 14B-T also has those 4 holes.

The head is off the engine so its easy to see what the deal is. Those 4 holes in question (drilled horizontally) line up with 4 of the headbolts (vertical of course). The 4 horizontal drillings actually go further into the head than where the headbolt passes through.

Normally with the head bolted on, looking into either of the 4 holes you would only see part of the head bolt. But without the headbolt in the way you can see the inner most end of the drilling is plugged by a small cup type freeze plug. No doubt that small plug is leaking.

The EPC shows the plug as 'PLUG, TIGHT, NO.1' part number 96411-11200

 

[Dieseler]

Looking at my engine the plug you are referring to is a large external plug at the front of the head , before I pull my head off I am I am going to remove the one headbolt and look deeper into the hole to see if there is a plug this is becoming a good learning experience.

 

[DanS HJ-45]

Looking at my engine the plug you are referring to is a large external plug at the front of the head , before I pull my head off I am I am going to remove the one headbolt and look deeper into the hole to see if there is a plug this is becoming a good learning experience.

Now, our 3B had the turbo added before Dad bought it, by the PO in Australia, but they removed that threaded plug and that's where they tapped into the head for coolant for the turbo. Having had that hose on and off about a bazillion times, I sure didn't see any steps or signs of an internal plug too.



Dan

 

[lostmarbles]

.....

The EPC shows the plug as 'PLUG, TIGHT, NO.1' part number 96411-11200

But, according to that image you've posted, aren't you now looking at the front RH area of the head (rather than the rear RH area)?

(I'm going off the part you highlighted in yellow.)

And that highlighted plug looks to me like it could well be the taper-threaded one that Dan is referring to below (which is completely unrelated to Dieseler's leak).

Edit.... I see Dieseler has noticed this error too.

Now, our 3B had the turbo added before Dad bought it, by the PO in Australia, but they removed that threaded plug and that's where they tapped into the head for coolant for the turbo. Having had that hose on and off about a bazillion times, I sure didn't see any steps or signs of an internal plug too. .......Dan

 

[Snailtrail]

Looking at my engine the plug you are referring to is a large external plug at the front of the head

No, im not referring to the square headed plug, im talking about the 4 evenly spaced holes in the side of the head.

That sqaure headed plug is a common part amongst 'B' series - even the 14B and 15B have them. That water outlet/inlet? is used sometimes as part of the heating system (as is the case on my BJ61) but is usually blocked off with that square plug.

Im sure the part i highlighted is in fact the small plug at the end of the drilling. The EPC shows a quantity of 4 and a OD=12.

I took a few pictures of the plug in the 14B-T head - hope it helps.

 

[Dieseler]

Snailtrail you may have something there the pics obviously show some kind of cap/freeze plug, I am wondering how hard it will be to pull or drill out and press or hammer in new ones while the head is still intack to the block.

This is cool we are all starting to learn something new.

By the way where did you get your parts reference catalog from the one I have does not display parts diagram only part numbers.

 

[Kynot62]

Exhaust side.

Here .... I've turned the gasket around and labelled "front" and "rear":

View attachment 439661

I've also pointed to the headbolt hole at the source of your leak. (I'm back home again now so I can do this easily.)



I agree! The bigger bore of the 3B means that head gasket should be incompatible.

Background: In the last month or so, I finally found a Toyota Dealer here in NZ (but not in my city) who is clued-up, does business on the Internet, and is easy-to-deal-with. When he told me gasket 11115-56120 would fit my BJ40 I didn't believe him because my research suggested it to be a 2B headgasket and for a much later model (1984 to 1989 as I recall). Anyhow, he ended up being right (as you can see in my photo-comparison with the gasket I bought from Engine Australia some years ago).

Google the part number and you should get what I did!

So I think it should surely fit your engine ..... But see what number your local Toyota dealer comes up with. (I believe this gasket should be the only choice open to your dealers now because I think it supersedes all the older numbers for a B or 2B engine.)

On the bright side, the cost was significantly less that what I hear people paying in USA/Canada for Toyota MLS 3B gaskets too! ($NZ105)

I love this thread, learning all sorts of new stuff about my 3B. A quick question about your head gasket picture Lostmarbles. Is the B/2B oil passage to the rocker arm in a different place than the 3B? On my 3B that oval hole in the gasket (really close to your arrow) is on the front of the engine not the rear as labeled. I recently put the head back on and noticed this passage is directly above the front bearing on the camshaft and it's how the oil gets to the upper end of the head.

Thanks
Tony

 

[Dieseler]

Looking at the gasket pics I am thinking the gaskets maybe upside down the rear gasket should have the 2 water journals in the rear where the 2 freeze plugs are and the elongated hole on the front of the engine for the oil journal.