Size of four water pump bolts on a 2F?

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SouthBostonFJ40

SouthBostonFJ40

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I'm replacing my water pump tomorrow. I need to buy new hardware before I drive to my garage which is about 40 mins away not near any stores that sell hardware. One bolt is completely missing and one is broken off. The broken one is longer than the other three and has an unthreaded section that accommodates a spacer and an adjuster arm for a power steering pump or alternater.

Who can tell me the correct size to buy?
 
So I just found out more info. The water pump has 3 - 4T bolts (10mm diam) and 1 - 5T bolt (10mm diam). Anyone know the length and thread pitch?
 
i axed this same question awhile back.... below is Poser's response (pasted)


10 x 1.5 thread, three of the originals are 45mm long, iirc, and the one with the smog pump tensioning bracket on it is 55 or 60.


Make sure the threads in the block are clean.
 
crotalusatrox said:
i axed this same question awhile back.... below is Poser's response (pasted)

10 x 1.5 thread, three of the originals are 45mm long, iirc, and the one with the smog pump tensioning bracket on it is 55 or 60.

Make sure the threads in the block are clean.
Click to expand...

Thanks!
 
Here are the part #s for the correct water pump bolts.

Longer bolt...

454f82b2.jpg


3 shorter bolts...

baeb19fc.jpg


Sent from my iPad using IH8MUD
 
Does anyone know if it would be an issue to use a shorter 45mm bolt in the hole where the longer 55mm goes? My FJ40 had been de-smogged by one of the POs, who used several washers to shim the bolt head to the pump where the smog pump mount used to reside.
 
Can't imagine why not
 
As long as you form a tight seal against engine and the pump doesn't leak, you should be fine.
 
Gentlemen, thanks for the input. My main worry was that the thread depth in the block would be different. After some sleep and looking at it again I realized that the only reason the bolt is longer is to accommodate the bracket and that the thread portion of the bolt is the same.

Who would have guessed that a project would turn into an obsession?
 
Would anyone happen to have a few up-close and personal technical photos of both the early F1.5 ‘s cast iron water pump and the later 2F ‘s aluminum water pump that show the original factory spacer in-place along with the drivers side lower mounting location alternator belt adjust bar , and the smog-pumps same drive belt tensioner bar that both affix to the RH. / right hand most of the 4 water pump bolts ?

90101-10269 Is having difficulty adjusting to being Alive once Again without the comfort of its collar to snuggle up to properly …😕

Thanks ….




IMG_5764.webp
IMG_5765.webp
IMG_5766.webp
 
crotalusatrox said:
i axed this same question awhile back.... below is Poser's response (pasted)


10 x 1.5 thread, three of the originals are 45mm long, iirc, and the one with the smog pump tensioning bracket on it is 55 or 60.


Make sure the threads in the block are clean.
Click to expand...
I just was at dealer today and found out what this thread already knew, the 60mm bolts is NLA
IMG_3783.webp


I guess I need to find a JIS source in Canada now.
 
As you go through the process of replacing the pump keep in mind that at least one of the bolts threads into the engine block, IIRC. Use thread sealer to prevent coolant from leaking.
 
Ol Yeller said:
I just was at dealer today and found out what this thread already knew, the 60mm bolts is NLA


I guess I need to find a JIS source in Canada now.
Click to expand...
We use 91212-51040 here for 75-84 2F's. 60mm 40mm long, 1.5 thread. Readily available.
EDIT, I apologize, I didn't read the earlier posts. 91212-51040 is what we use for the regular water pump bolts, not the longer one with adjuster bracket.
 
Last edited:
cruisermatt said:
We use 91212-51040 here for 75-84 2F's. 60mm long, 1.5 thread. Readily available.
Click to expand...
The last two digits are the length, so 40 is not 60, no matter what you tell your GF.😛 If you are installing on a pre-75 engine that still has the alternator on the lower left side, you NEED that long bolt for the adjuster bracket and spacer. I just got done installing one on Project Reset, which the PO didn't use the long bolt, and instead put a spacer behind the ear of the alternator.:rolleyes:

Fortunately, because it is spaced off from the water pump, the 14mm head is not critical in that position, and bolts with a 15mm head are readily available in the aftermarket.
 
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65swb45 said:
The last two digits are the length, so 40 is not 60, no matter what you tell your GF.😛 If you are installing on a pre-75 engine that still has the alternator on the lower left side, you NEED that long bolt for the adjuster bracket and spacer. I just got done installing one on Project Reset, which the PO didn't use the long bolt, and instead put a spacer behind the ear of the alternator.:rolleyes:

Fortunately, because it is spaced off from the water pump, the 14mm head is not critical in that position, and bolts with a 15mm head are readily available in the aftermarket.
Click to expand...
TY both for the knowledge, I’ll just be happy to get rid of the rusty 13mm head bolt in that spot.
 
@65swb45 Mark yes you are absolutely correct, I made the mistake of posting in haste and just reading the thread title, and not the later comments where he was looking for the longer bolt for the 1F/Non-US 2F adjuster.
 
cruisermatt said:
@65swb45 Mark yes you are absolutely correct, I made the mistake of posting in haste and just reading the thread title, and not the later comments where he was looking for the longer bolt for the 1F/Non-US 2F adjuster.
Click to expand...
No worries. I KNOW you know this Matt. Just having a little fun. In fact, I also know that you know a lot of things I don't, and I'm not afraid to say that either.😊

Happy Holidays!
 
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Ol Yeller said:
TY both for the knowledge, I’ll just be happy to get rid of the rusty 13mm head bolt in that spot.
Click to expand...
Get one 70mm long. It's easier to put an extra washer under the head of the bolt than to stretch a bolt that is not long enough.
 
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