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Pivot bolt in tensioner stripped #5231474 10/05/19 08:24 PM
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NavyVet88 Offline OP
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2013 civic lx 1.8L 179k

So my water pump bearing is on its way out and I was taking the belt tensioner off to access the last bolt on the pump which is hidden behind the tensioner. Well, the 8mm Allen head pivot bolt in the tensioner is stripped I’m assuming from my local shop who installed the new tensioner in January.

I had the passenger side front tire off to gain better access and everything. I have a few inches of space at best and I cannot get a good bite in this bolt. Allen keys, Allen sockets, torq bits, I can’t get anything to grab. The bolt is recessed to where it’s pretty much flush and I can’t get pliers on it.

What can I do?

Last edited by NavyVet88; 10/05/19 08:25 PM.

2013 Honda Civic LX 1.8L 178k M1 HM 0w20 with Fram XG7317
2002 Ford Ranger Edge 3.0L 67k Castrol Edge 5w30 with Fram XG3600
Maintenance Technician by trade, working class for life.
Re: Pivot bolt in tensioner stripped [Re: NavyVet88] #5231494 10/05/19 08:36 PM
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Trav Offline
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Drill the head off, remove the part and go after the remnant with vise grips. You could try an XZN bit that is slightly larger and pound it in with a hammer but I have a feeling it will strip out also.

Last edited by Trav; 10/05/19 08:41 PM.

ASE L1, Master. Deutsch Meisterbrief.
Re: Pivot bolt in tensioner stripped [Re: NavyVet88] #5231512 10/05/19 08:49 PM
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P10crew Offline
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You may be able to weld a nut on the head of the bolt

Re: Pivot bolt in tensioner stripped [Re: P10crew] #5231530 10/05/19 09:08 PM
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NavyVet88 Offline OP
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I don’t know. There’s maybe two and a half inches of wiggle room.


2013 Honda Civic LX 1.8L 178k M1 HM 0w20 with Fram XG7317
2002 Ford Ranger Edge 3.0L 67k Castrol Edge 5w30 with Fram XG3600
Maintenance Technician by trade, working class for life.
Re: Pivot bolt in tensioner stripped [Re: Trav] #5231532 10/05/19 09:09 PM
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NavyVet88 Offline OP
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There’s no room for a hammer I already tried that.


2013 Honda Civic LX 1.8L 178k M1 HM 0w20 with Fram XG7317
2002 Ford Ranger Edge 3.0L 67k Castrol Edge 5w30 with Fram XG3600
Maintenance Technician by trade, working class for life.
Re: Pivot bolt in tensioner stripped [Re: NavyVet88] #5231556 10/05/19 10:01 PM
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Trav Offline
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Can you post a picture of this thing?


ASE L1, Master. Deutsch Meisterbrief.
Re: Pivot bolt in tensioner stripped [Re: NavyVet88] #5231568 10/05/19 10:36 PM
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spasm3 Offline
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Perhaps they could not get it tight and used some strong lock-tite on it. I'd use some heat and try again.

Can you see the bolt to verify its not a torx?

Last edited by spasm3; 10/05/19 10:36 PM.

13 elantra 84k 5w30 synpwr
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Re: Pivot bolt in tensioner stripped [Re: NavyVet88] #5231571 10/05/19 10:37 PM
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spasm3 Offline
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This video lists it as an 8mm allen head. Do you have that for a ratchet? If not perhaps thats what you need.



13 elantra 84k 5w30 synpwr
03 chevy avalanche 83k synpwr 5w30
17 mazda cx-5 19000 miles m1 0w30
Re: Pivot bolt in tensioner stripped [Re: NavyVet88] #5231737 10/06/19 07:54 AM
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andyd Offline
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A guy taught me this trick for dealing with.a wallowed out socket head. First dig all the dirt out Wack it with the ball of a hammer.Stop peening when the allen no longer fits. Then lightly tap the allen in. The metal In the socket moves away from the hole . On a really messed up bolt head, you can see or feel the displaced steel.. Move the metal back into the socket . Rinse and repeat.. There are 12 10mm socket head bolts holding in an E-28 rear axle. I used to harvest axles . I had a very high success rate with this method and it works on smaller ones too. To prevent it in the first place the tool needs to bottom in the socket. The socket must be clean ! I sold the axles, but 10x50mm bolts hold the starter in the Rat. and a few other things too. grin2


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1994 Ranger ,the Rat, 5w30 dino, STP filter

'16 Camry SE, Valvoline HM 0w20 and OEM filter
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Re: Pivot bolt in tensioner stripped [Re: andyd] #5231759 10/06/19 08:22 AM
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Trav Offline
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He already said.

Quote
There’s no room for a hammer I already tried that.


ASE L1, Master. Deutsch Meisterbrief.
Re: Pivot bolt in tensioner stripped [Re: NavyVet88] #5231793 10/06/19 09:05 AM
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mk378 Offline
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Since it seems to be close to the top, It may help to remove the motor mount and lift that side of the engine up for better access. Also detach the transmission side so it can tilt down.

Re: Pivot bolt in tensioner stripped [Re: NavyVet88] #5231807 10/06/19 09:15 AM
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Imp4 Offline
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Try a bolt extractor socket. Tap it on and use like a standard socket.
$29.99 for the set at Harbor Freight.

Screenshot_2019-10-06-10-13-55.png
Re: Pivot bolt in tensioner stripped [Re: NavyVet88] #5231880 10/06/19 10:38 AM
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spasm3 Offline
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If can get any grip at all with an 8mm Allen head socket, stop and heat it good in case they used lock-tite, then try.

Last edited by spasm3; 10/06/19 10:38 AM.

13 elantra 84k 5w30 synpwr
03 chevy avalanche 83k synpwr 5w30
17 mazda cx-5 19000 miles m1 0w30
Re: Pivot bolt in tensioner stripped [Re: NavyVet88] #5232373 10/06/19 08:03 PM
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gamefoo21 Offline
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Cut the end off your 8mm allen socket. You want it flat, no taper on the end.

Make sure there's no dirt in the socket head.

Heat the bolt, short hits with a mapp torch, get the heat penetrated into it completely.

Start by trying to tighten the bolt just a bit to crack it, then try loosening it doing your best to keep it straight. Hopefully it comes.

If not, it's either trying bigger torx or 3/8 allen or destroying stuff with a reciprocating saw.

Re: Pivot bolt in tensioner stripped [Re: NavyVet88] #5232781 10/07/19 10:05 AM
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mehullica Offline
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I don’t know if this will work for you, it did for me in a similar situation. Cut an 8mm key down to a size long enough to seat all the way in the tensioner, & long enough to use a prybar against the frame rail to help keep the key wedged in place. Put a wrench over the key before using the prybar. Then if someone can help, one works the prybar & the other works the wrench on the Allen key.

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