Stripped the threads out of the aluminum rear timing cover.

Replaced with heli coil and grade 10 stud a nut.
It was a pain getting the coil in but the stud fit really tight and doesn't wiggle at all.

What do you think? Will it hold?

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U.S. Army Retired

Should geordi and I have seen several tensioner mounting holes that were helicoiled from the factory.

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Sold to LOST member my 05 Ltd, GDE Stg II turbo + TCM tune, SunCoast TC w. Transgo kit, Steiger window regulators, Samcos, Fumoto valve, 2nd gen filter head with Lub. Spec. bleeder, Hayden clutch & 11 blade fan, inverted spare, P-1 battery, BF Goodrich Long Trail TAs, Etecno1 glow plugs, timing belt at 50K miles/8 yrs

Yes it had a factory heli coil that pulled out.
I was afraid that too much aluminum got stripped out and that a new heli coil wouldn't stick in there. But with the stud in there it's really tight.

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U.S. Army Retired

Helicoil thread repair coils inserted correctly are actually stronger than the original aluminum threads as the coil is larger and the repair threads set deeper into the metal where they are being placed. The coil is much stronger than the aluminum metal around it!
Been using standard & metric Helicoils for forty years and have always been impressed by their holding ability....in both aluminum and steel...

You may want to use a little Loctite 263 (red type) on the threads of the stud on the mounting end; might make it a little bit stronger???

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Supporting Vendor and Moderator of LOST
05 Jeep Liberty CRD Limited
Ironman Springs/Bilstein/Shocks
Yeti StgIV Hot Tune
Week's BatteryTray
No FCV/EGR
Samcos/ProVent
SunCoast/Transgo
Carter Intank-pmp
2mic.Sec.Fuel Filter
Flowmaster/NO CAT
V6Airbox/noVH
GM11 Bld.fan/HDClutch
IronrockArms/wwdieselMount
98 Dodge Cummins 24 Valve

Any reason you left the tang on the heli coil insert after you installed it?

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2020 Ram 1500 CC Ecodiesel Limited
1995 Dodge Ram 2500 4x4, 5.9 Cummins, 47RH, Reg Cab
2005 Liberty CRD,fixed the rockers and a couple more things,GDE Hot tune,Weeks Stage 1 and 2 EGR delete,Hot Diesel solutions Tstat assembly(wonderful heat!), ARP studs, OME 1.5" lift.....thanks Seth! (Sold)
2006 Liberty CRD....The Moose Hit

I didn't know what else to do with it.

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U.S. Army Retired

I think that tang can be bent till it breaks, should have had some small cuts at the breaking point from the factory and with a needle nose pliers you can bend back and forth till it breaks, at least this is how I remember it, but I am not a fan of helicoil and wwdiesel can probably tell you more exactly how to deal with it...

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2005 kj CRD, samco, suncoast tc, provent, Kennedy lift pump, GDE ECO full torque, 2nd gen filter head, 245/70/16 a/t tires, mopar light bar, fumoto oil valve, OEM Skid Plates, ARB Front bumper and HD OME, tru cool LPD47391 40k GVW tranny cooler (stock cooler delete), FF Dynamics e-fan and shroud, rocker arms replaced, HDS2 190F thermostat.

Looks ok to me, but what caused the original helicoil to pull out?

How much force were you using? The correct amount is 28ft-lb to hold the tensioner. The AllData book that my idiot mechanic used on my first engine has it as EIGHTY! Way wrong! Part of the reason why I don't go to that mechanic anymore.


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Proud supporting vendor of LOST Jeeps
TRAVELING CRD TECH. I come to you!
Need help? Just ask! I've taken it apart more than most.
Email jeep [at] maincomputer [dot] com - BOARD MESSAGING IS BROKEN
Over 225 CRDs currently driving with my valves, timing belt, rockers, or ARP Studs.
Bad noises = REALLY bad things.

Use a punch and hammer. Give it one good hit from the stud side, and it should break right off. It's not necessary to break it if it isn't in the way though.

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2005 Liberty CRD Limited
DIY Garage Remanufactured Engine with GDE Full Torque Eco Tune from mile zero.
ARP Studs
Cummins Lift Pump
Transgo HD2 Reprogramming Kit
DIY Rebuilt Tranny Pump
Suncoast Torque Converter
2nd Generation Fuel Head
Sears P1 Battery
Hot Diesel Solutions Thermostat

There is plenty of space back there, I'd leave that tang alone. It is already built and seems to be OK, and that cover has already been fixed... And cast metals don't like being impacted much. You don't need any more problems with it!


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_________________
Proud supporting vendor of LOST Jeeps
TRAVELING CRD TECH. I come to you!
Need help? Just ask! I've taken it apart more than most.
Email jeep [at] maincomputer [dot] com - BOARD MESSAGING IS BROKEN
Over 225 CRDs currently driving with my valves, timing belt, rockers, or ARP Studs.
Bad noises = REALLY bad things.

Thanks guys.

It's all re assembled and running good.

_________________
U.S. Army Retired

Helicoils usually go in tang end first with a special tool which is also used to break off the tang. Never thought of installing one that way before but since I do not have the special tool, will try that way if I need to use one.
John

I've never broken the thing off anytime I've used a helicoil, hasn't been a problem yet.

My preference is a solid collar though, I just think those are more secure.

Mine too, if you don't go nuts torquing the bolt in the collar, it's just perfect, especially for using it in soft alloys like aluminum. I use timesert btw.

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2005 kj CRD, samco, suncoast tc, provent, Kennedy lift pump, GDE ECO full torque, 2nd gen filter head, 245/70/16 a/t tires, mopar light bar, fumoto oil valve, OEM Skid Plates, ARB Front bumper and HD OME, tru cool LPD47391 40k GVW tranny cooler (stock cooler delete), FF Dynamics e-fan and shroud, rocker arms replaced, HDS2 190F thermostat.

500 miles on it so far.
If something were to break, I think it would have done it by now.

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U.S. Army Retired

Good to know that it also isn't leaking! Keep it going dude!