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Old 11-14-2019, 06:29 AM
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glhs#116 glhs#116 is offline
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Default Timing Cover Helicoil

Quick question. What helecoil and drill bit do I need to put some real threads for the oil pan bolts on the front timing cover?

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Old 11-14-2019, 07:23 AM
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You need a 5/16X18 heli kit and if I recall right off the top of my head a 25/64 drill bit, but double check me on that!

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Old 11-14-2019, 07:23 AM
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gtokid1968 gtokid1968 is offline
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heli -col makes a kit every thing needed is in the kit.
Just buy it for the original bolt size.

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Old 11-14-2019, 08:40 AM
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Quote:
Originally Posted by gtokid1968 View Post
heli -col makes a kit every thing needed is in the kit.
Just buy it for the original bolt size.
Yep, buy the whole kit. I do every time I need a size I don't have, now I have a drawer full of the most common sizes and they come in extremely handy in those emergency situations. Usually comes with a selection of various length thread inserts. WAY better than the original threads in an old timing cover. Use the factory torque spec if possible, with an oil pan tighter doesn't always mean better ... just bends the pan.

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Old 11-14-2019, 12:52 PM
mgarblik mgarblik is offline
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As I mentioned on another thread, the coils can be cut to length successfully for blind, shallow hole applications with a sharp pair of diagonal cutters and dressed carefully with a stone or sharp file.

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Old 11-14-2019, 01:01 PM
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In a pinch and seing as where you live Sam if it's only one bolt hole that needs repair it may just be best to go up to the next metric size bolt.

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Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs!
And he was not talking about 1/8 or 1/4 mile ETs!

1) 1940s 100% silver 4 cup tea server set.

Two dry rotted 14 x 10 Micky Thompson slicks.

1) un-mailed in gift coupon from a 1972 box of corn flakes.
Two pairs of brown leather flip flops, never seen more then 2 mph.

Education is what your left with once you forget things!
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Old 11-14-2019, 07:52 PM
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If your engine is still together, you can run a 3/8 NC tap right through the stripped timing cover threads and use a 3/8 course bolt in that hole.

It's ghetto, but it works.

Good luck, -Abone.

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Old 11-20-2019, 09:58 AM
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I've always found it was best to start all the pan to cover bolts before tightening the cover to block bolts. I would also tap the pan forward before tightening the pan bolts.

Anti-seize on the studs and bolts around the water holes is a good idea too.

.

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