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MyEH Rattle revealed

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The torque converter cover is off and here is what I found. My amateur diagnosis in this [http://oldholden.com...|POST] was a torque converter to flexplate bolt had come loose and was rattling it's way around in the inspection cover. I WAS RIGHT. However all 3 converter bolts had come undone. So there was no drive connection between the transmission and engine yet I drove the car home. I guess the heavens were being nice to me. I found 1 bolt in the bottom of the cover, a second, as seen in this pic was still in the flexplate. This would have been the one making all the noise. The third one is nowhere to be found. I have searched everywhere and cannot see it. I cannot see where it has broken throuh the bellhousing/ cover etc to get out and disappear onto the road. It's a mystery. I will borrow one of those arthroscope type cameras on Monday and have a look up the top of the bellhousing to see if it's jammed up there somewhere. I have now run a tap through the converter bolt holes so will also have a look at those threads to make sure they are servicable. The original bolts were 8.8 grade so I'll see if I can get some 10.9 or higher, cover them in loctite and put it all back together. Check [http://gallery.oldho...|SHED] for more pics.

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maybe wedged up in the starter?
do you recall actually tightening them or possibly simply forgot.

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Craig
____[ \__
~()-----()-\

I had a good look from underneath and cant see it in there. I'll get the camera Monday and have a really good look from every angle I can.

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[http://gallery.oldho...|My EH Holden Shed]

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You've used up all your luck..

I'm glad you made it home in one piece. Coulda been a lot worse.

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........𝓣𝓲𝓢.

βœ„--------------------------------------------------------

-_--_--_ _______._
_--_-_ -/___+__|__\__
.,.,.,,.,|_O ________O_|

If I was really lucky I would have been able to remember if I actually tightened these bolts all those years ago. If I was really really lucky the bloody things wouldn't have come loose. I guess it will only cost $20 to fix so I can't complain too much considering my first thoughts were that it was an engine bottom end problem..

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[http://gallery.oldho...|My EH Holden Shed]

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this is a fairly common problem ,always use some loctite on them.

wombat.

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they are fairly tight after you do lock-tight them. I would also be checking the bolt holes have not elongated, and be sourcing new bolts too. Is one of the bolts snapped off and still in the converter?

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If your project doesn't work, look for the part you didn't think was important.

One should forgive one's enemies, but not before they are hanged

mckackie

I've done a bit of research and YES this is common. I was amazed to see that they had all simply vibrated loose and then just fallen out. I was thinking of installing these with some vibration proof washers heaps of Loctite and, if I can find grade 10.9 or 12.9, a heap of torque. I am also going to reinstall everything and leave the inspection cover of for a while so I can check them and retension if necessary.

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[http://gallery.oldho...|My EH Holden Shed]

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How long ago did you fit them?

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The engine went back in on 21/7/09. See [http://gallery.oldho...|PIC]. The car was first started on 6/9/09. See this [http://gallery.oldho...|PIC]. It then went back to the painters and trimmers and was registered on 20/8/10. Probably done 800km's since then. It sounds like this is a common problem for the inexperienced (read ME). Luckily no real damage has happened so I have been lucky. I have a new set of ARP bolts on the way from [http://gallery.oldho...|ROCKET INDUSTRIES] and I dug out the 262 Loctite so I'm ready to screw it back together on Saturday and hopefully have this problem solved for good.

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[http://gallery.oldho...|My EH Holden Shed]

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Then it would be safe to say that you did not leave the bolts loose.

Nice car too.

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They didn't bottom out on the convertor?

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I don't remember checking this when I initially installed the transmission. However when I was under the car on the weekend pulling everything down I don't recall seeing any marks on the converter that would indicate the end of the bolt was contacting it. It's a mystery.

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[http://gallery.oldho...|My EH Holden Shed]

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didnt have paint on the bosses where the flexplate is bolted to..?

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steve..
O.H.T.C. Original Member.
My Shed

but not thick enough that I would think it could cause this to happen. However that paint is gone now and I have now draw filed every mounting surface so there is no chance of anything like this happening again.
As an interesting aside I collected a new set of ARP converter bolts this morning. These are made specifically for this application. There are 6 bolts in their kit however my Holden flexplate and the American made B&M torque converter only have 3 mounting bolt holes. SO I wonder if there is a known issue with these and a fix was to upgrade to 6 bolts. DON'T KNOW. BTW the ARP number for the bolt kit is 230-7305..

EDIT, 7305 is a 6 bolt kit for "trucks", 7304 is a 3 bolt kit for cars.

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[http://gallery.oldho...|My EH Holden Shed]

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If you have enough room you could safety wire the bolts to give you security that they won't come out again.

Safety Wire >

http://i.imgur.com/x...

Pliers >

http://i.imgur.com/z...

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Disclaimer :- The above is purely speculation and is only posted for entertainment purposes!!!

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