Installing Doug Thorley Headers

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Mar 18, 2017 | 10:48 PM

1FreshLS4

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Installing Doug Thorley Headers

What's up fellas,
I recently purchased a set of Doug Thorley headers for my 2009 impala ss LS4 and started the install today. Everything was going good til I ran into the dam transmission tube that needs to be removed while installing the main Y pipe (from underneath). Was stuck on this for over 2 hours and ended up breaking the rubber piece that goes in the transmission hole where the tube goes into ( lost more tranny fluid in process). My question is does anybody know the best way to get this tube in the transmission with the main Y pipe in place? Having problems connecting Y pipe to back headers with tranny tube installed. I tried several angles and can't get it to go in. Any feed back would be highly appreciated.

Thanks

Mar 19, 2017 | 05:22 AM

91parkave

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https://ls1tech.com/forums/ls4-perfo...tures-lol.html

Mar 19, 2017 | 07:41 AM

rottonj

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Quote:

Originally Posted by 91parkave

https://ls1tech.com/forums/ls4-perfo...tures-lol.html

That just says the transmission dipstick is a bitch and you are on your own, not much help really. I have not done headers, but maybe undoing the top motor mount and rocking the motor forward may help some?

Mar 19, 2017 | 09:56 AM

lVloses

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Have someone help you with the tranny dipstick tube. It needs to be installed simultaneously with the downpipe. I've had to do it many times and it's really not that bad with another person there.

Mar 19, 2017 | 11:27 AM

1FreshLS4

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Quote:

Originally Posted by rottonj

I might have to give that a try I didn't think about that.

Mar 19, 2017 | 11:37 AM

1FreshLS4

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Quote:

Originally Posted by lVloses

Have someone help you with the tranny dipstick tube. It needs to be installed simultaneously with the downpipe. I've had to do it many times and it's really not that bad with another person there.

My fiancé was helping me and we couldn't get the downpipe on the back headers with the tube barely installed. Took tube in and out so much I broke a rubber piece that goes in the tranny hole where the tube goes and now the tube doesn't stay in the tranny hole tight. I am going to give it another try tomorrow once I get that rubber piece. Thanks for the reply man

Mar 19, 2017 | 12:07 PM

rottonj

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From: Connecticut

Quote:

Originally Posted by 1FreshLS4

I might have to give that a try I didn't think about that.

I did that to get that number 8 plug out, and that is right next to the dipstick. It may help, sounds like you will be replacing something anyway. Here is the tube and seal from RockAuto. Good luck.

http://www.rockauto.com/en/moreinfo....440277&jsn=479

http://www.rockauto.com/en/moreinfo....440277&jsn=482

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Mar 19, 2017 | 01:34 PM

rottonj

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From: Connecticut

Np, post some pics when completed of the car, mods and install.

Mar 20, 2017 | 06:08 AM

#10

91parkave

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Notch the bracket on the dipstick tube.

Mar 20, 2017 | 10:38 AM

#11

1FreshLS4

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Quote:

Originally Posted by 91parkave

Notch the bracket on the dipstick tube.

What exactly do you mean by notch?

Mar 20, 2017 | 12:06 PM

#12

rottonj

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Make it so you can install the bolt then slip the bracket on to the bolt by trimming off the end of the bracket.

Mar 20, 2017 | 02:04 PM

#13

1FreshLS4

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Quote:

Originally Posted by rottonj

Make it so you can install the bolt then slip the bracket on to the bolt by trimming off the end of the bracket.

I'm a lil confused on how to slip bracket on bolt when bolt goes in from top. Basically you're saying cut the end of the bracket where bolt goes and I should be fine?

Mar 20, 2017 | 02:26 PM

#14

pdxmotorhead

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From: PDX-OR-USA

You slot the bracket so its a "U" instead of an "O" and use a serrated lock washer to keep it from moving when tight.

Mar 20, 2017 | 02:35 PM

#15

1FreshLS4

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Quote:

Originally Posted by pdxmotorhead

You slot the bracket so its a "U" instead of an "O" and use a serrated lock washer to keep it from moving when tight.

O ok so cut the O part where the screw goes down the middle that way it's a half of a O (u shaped), add washer and slide bracket on screw from side then tighten?