Header Bolts

Buckbee1129 · 06-30-2008, 10:15 PM

I am trying to change out my front exhaust manifold and it sux. Does any one know the size of the bolts were the header meets the Y-pipe?

They are two different sizes and For some reason none of my wrenches match up.

Any sugestions???

bgred619 · 06-30-2008, 10:21 PM

The Nuts & Bolts Guide to: 2.5l/3.0l Engines

header nuts are 13mm
y-pipe nuts should be 15mm

if they are stock!

B3NN3TT · 06-30-2008, 10:24 PM

They are either 13 or 15mm, but the rust might be giving you problems. Might need to get some Craftsman bolt extractors.

Buckbee1129 · 06-30-2008, 10:24 PM

Thanks alot

Monkeygrits · 07-01-2008, 11:24 AM

yep like B3nn3tt said, go get a set of bolt outs at sears...One of the best things for that job ever..Little square red case

byrdman · 07-01-2008, 11:50 AM

I just took off exhausts from two diff cougs. My coug had sizes ranging from 14-17 mm and the other coug had 14-15mm. I had to use wd-40 to get them off...nothing special.

aircougar1 · 07-01-2008, 03:33 PM

Quote:

Originally Posted by Monkeygrits

yep like B3nn3tt said, go get a set of bolt outs at sears...One of the best things for that job ever..Little square red case

Yes... and make sure you get the second part of that kit too... When I bought mine, there were 5 in the case, but an extra 5 piece set can be bought to fill in the other 5 empty spaces in that red box...

trust me, with this car, you'll most likely need EVERy one of those bolt extractors at some point!

And due to heat and rust, the stock 15mm nuts for the y-pipe tend to wear down to 13 or 14mm sizes... you sometimes can hammer a socket on the nut, but chances are the bolts will break when loosening them...

michcougar · 07-01-2008, 03:37 PM

Just think too, the front one is the easier one LOL

The rear one is a PITA

06-30-2008, 10:15 PM	#1 (permalink)
Buckbee1129 NECO Member Join Date: Nov 2007 Location: Richmond MI Posts: 52	Header Bolts I am trying to change out my front exhaust manifold and it sux. Does any one know the size of the bolts were the header meets the Y-pipe? They are two different sizes and For some reason none of my wrenches match up. Any sugestions??? __________________

06-30-2008, 10:21 PM	#2 (permalink)
bgred619 NECO Member Join Date: Oct 2000 Posts: 1,081	Re: Header Bolts The Nuts & Bolts Guide to: 2.5l/3.0l Engines header nuts are 13mm y-pipe nuts should be 15mm if they are stock!

06-30-2008, 10:24 PM	#4 (permalink)
Buckbee1129 NECO Member Join Date: Nov 2007 Location: Richmond MI Posts: 52	Re: Header Bolts Thanks alot __________________

07-01-2008, 11:24 AM	#5 (permalink)
Monkeygrits A RoundHouse To The FACE Join Date: May 2001 Location: SW Pennsylvania Posts: 2,615 Images: 2	Re: Header Bolts yep like B3nn3tt said, go get a set of bolt outs at sears...One of the best things for that job ever..Little square red case __________________ Finally Made A Cardomain Site!!!!!!!! CougarDB Monkey's Myspace

07-01-2008, 11:50 AM	#6 (permalink)
byrdman NECO Member Join Date: Aug 2003 Posts: 684	Re: Header Bolts I just took off exhausts from two diff cougs. My coug had sizes ranging from 14-17 mm and the other coug had 14-15mm. I had to use wd-40 to get them off...nothing special. __________________ Everybody looks small in my rear view mirror

07-01-2008, 03:37 PM	#8 (permalink)
michcougar NECO Member Join Date: Jan 2004 Location: Fort Erie, ontario Posts: 2,240	Re: Header Bolts Just think too, the front one is the easier one LOL The rear one is a PITA __________________ MICH, 99 laser red Roush cougar MTX - Msds-Injen/GMK-magnaflow-ford racing-svt-Xcal2-b&g-kyb-tezzen-clarion-earthquake

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