exhaust manifold bolt size

dusterbd13 · 06-23-2009, 01:02 PM

anyone know what these things are? ive gotta buy some bolts for mine.
metric, standard, coarse, fine, what?

i dont wanna pull down the daily without the parts to put it back together again.

its an 87, 2.8 if that makes any difference.

Michael

bobditts · 06-23-2009, 02:21 PM

i threw out my package! dang! I just went to napa and they new exactly which kit to get.

wait, are you talking about the bolt used to the engine block, or to the Y pipe?

The_Raven · 06-23-2009, 06:21 PM

Into the head are 8mm, IIRC, 1.5 thread pitch, no idea only length of the stock bolts though, since I used a different length in my application.

bobditts · 06-23-2009, 11:31 PM

i just took mine off so what exactly do you need the size of? just need to know which size wratchet to use?

dusterbd13 · 06-24-2009, 10:06 AM

raven got it. 8X1.5

im swapping headers on to fix my cracked manifold, so length really doesnt matter too much.

while you have yors off, if you could double check that trhread size, it would be greatly appreciated.

bobditts · 06-24-2009, 12:57 PM

I have no idea how to do that

dusterbd13 · 06-24-2009, 02:02 PM

if you go by the parts store, they have a little gauge that you thread the bolt into that tells you the size and pitch of the threads.

im really in no hurry, im doing exhaust next weekend or the weekend after.

michael

bobditts · 06-24-2009, 03:05 PM

not sure when that will be, but Ill keep it in mind. You plan on replacing the manifolds with the engine in the vehicle? Hope you dont break any bolts. One of mine broke and I had to drill it out. It was easy with the engine on a stand. Cant imagine attempting to do that in the engine bay. Not fun at all.

bobditts · 06-27-2009, 07:38 PM

well my new manifolds showed up today and new bolts were not supplied. Looks like I too will have to go get some new bolts.

bobditts · 07-02-2009, 06:58 PM

Went to Lowes today and picked up the following bolts which DO work

M8-1.25 x 40 (8 of these. These are the shorter bolts for the 4 corners of each manifold)

M8-1.25 x 60 (4 of these. If you can find bolts that are 70mm long, get those instead. I was unable to find them. The 60mm barely fits, but I think it will be good enough)

Dont forget to get the proper washers for the bolts.

Hope this helps!

dusterbd13 · 07-02-2009, 07:08 PM

thanks so much.
fixing the manifolds has been put on hold till finances are a little better, but now i can start scrounging the prts.

michael

stick shift · 07-02-2009, 09:06 PM

I don't know if this is good practice or not, but I put a little antisieze on the threads to try and prevent some rusting otherwise it seems like I always snap one taking them out.

bobditts · 07-02-2009, 09:27 PM

I dont see why that would be a problem, as long as the bolts dont loosen

bobditts · 07-03-2009, 04:22 PM

OK I lied. The 60mm Bolts definitely do NOT work. You have to find 70mm. Looks like im going to try home depot, and if that doesnt work, NAPA. Napa usually has all the bolts, but they are pricey!.

bobditts · 07-10-2009, 08:58 PM

went to Ace Hardware today and they have all the sizes needed. Their hardware section RULES!!! did you know they sell chrome bolts and other small hardware accessories????

06-23-2009, 01:02 PM	#1
dusterbd13 GRM Challenge Truck Age: 28 Join Date: Apr 2008 Posts: 306 Location: User is: OffLine	exhaust manifold bolt size anyone know what these things are? ive gotta buy some bolts for mine. metric, standard, coarse, fine, what? i dont wanna pull down the daily without the parts to put it back together again. its an 87, 2.8 if that makes any difference. Michael Last edited by dusterbd13 : 06-23-2009 at 01:03 PM. Reason: more info
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06-23-2009, 02:21 PM	#2
bobditts banned Age: 25 Join Date: Aug 2008 Posts: 947 Location: User is: OffLine	Re: exhaust manifold bolt size i threw out my package! dang! I just went to napa and they new exactly which kit to get. wait, are you talking about the bolt used to the engine block, or to the Y pipe?
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06-23-2009, 06:21 PM	#3
The_Raven Registered User Age: 32 Join Date: Oct 2003 Posts: 1,039 Location: The Nest User is: OffLine	Re: exhaust manifold bolt size Into the head are 8mm, IIRC, 1.5 thread pitch, no idea only length of the stock bolts though, since I used a different length in my application.
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06-23-2009, 11:31 PM	#4
bobditts banned Age: 25 Join Date: Aug 2008 Posts: 947 Location: User is: OffLine	Re: exhaust manifold bolt size i just took mine off so what exactly do you need the size of? just need to know which size wratchet to use?
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06-24-2009, 10:06 AM	#5
dusterbd13 GRM Challenge Truck Age: 28 Join Date: Apr 2008 Posts: 306 Location: User is: OffLine	Re: exhaust manifold bolt size raven got it. 8X1.5 im swapping headers on to fix my cracked manifold, so length really doesnt matter too much. while you have yors off, if you could double check that trhread size, it would be greatly appreciated.
	[Reply w/Quote]

06-24-2009, 12:57 PM	#6
bobditts banned Age: 25 Join Date: Aug 2008 Posts: 947 Location: User is: OffLine	Re: exhaust manifold bolt size I have no idea how to do that
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06-24-2009, 02:02 PM	#7
dusterbd13 GRM Challenge Truck Age: 28 Join Date: Apr 2008 Posts: 306 Location: User is: OffLine	Re: exhaust manifold bolt size if you go by the parts store, they have a little gauge that you thread the bolt into that tells you the size and pitch of the threads. im really in no hurry, im doing exhaust next weekend or the weekend after. michael
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06-24-2009, 03:05 PM	#8
bobditts banned Age: 25 Join Date: Aug 2008 Posts: 947 Location: User is: OffLine	Re: exhaust manifold bolt size not sure when that will be, but Ill keep it in mind. You plan on replacing the manifolds with the engine in the vehicle? Hope you dont break any bolts. One of mine broke and I had to drill it out. It was easy with the engine on a stand. Cant imagine attempting to do that in the engine bay. Not fun at all.
	[Reply w/Quote]

06-27-2009, 07:38 PM	#9
bobditts banned Age: 25 Join Date: Aug 2008 Posts: 947 Location: User is: OffLine	Re: exhaust manifold bolt size well my new manifolds showed up today and new bolts were not supplied. Looks like I too will have to go get some new bolts.
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07-02-2009, 06:58 PM	#10
bobditts banned Age: 25 Join Date: Aug 2008 Posts: 947 Location: User is: OffLine	Re: exhaust manifold bolt size Went to Lowes today and picked up the following bolts which DO work M8-1.25 x 40 (8 of these. These are the shorter bolts for the 4 corners of each manifold) M8-1.25 x 60 (4 of these. If you can find bolts that are 70mm long, get those instead. I was unable to find them. The 60mm barely fits, but I think it will be good enough) Dont forget to get the proper washers for the bolts. Hope this helps!
	[Reply w/Quote]

07-02-2009, 07:08 PM	#11
dusterbd13 GRM Challenge Truck Age: 28 Join Date: Apr 2008 Posts: 306 Location: User is: OffLine	Re: exhaust manifold bolt size thanks so much. fixing the manifolds has been put on hold till finances are a little better, but now i can start scrounging the prts. michael
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07-02-2009, 09:06 PM	#12
stick shift Registered User Age: 19 Join Date: Mar 2007 Posts: 122 Location: Green Bay, WI User is: OffLine	Re: exhaust manifold bolt size I don't know if this is good practice or not, but I put a little antisieze on the threads to try and prevent some rusting otherwise it seems like I always snap one taking them out.
	[Reply w/Quote]

07-02-2009, 09:27 PM	#13
bobditts banned Age: 25 Join Date: Aug 2008 Posts: 947 Location: User is: OffLine	Re: exhaust manifold bolt size I dont see why that would be a problem, as long as the bolts dont loosen
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07-03-2009, 04:22 PM	#14
bobditts banned Age: 25 Join Date: Aug 2008 Posts: 947 Location: User is: OffLine	Re: exhaust manifold bolt size OK I lied. The 60mm Bolts definitely do NOT work. You have to find 70mm. Looks like im going to try home depot, and if that doesnt work, NAPA. Napa usually has all the bolts, but they are pricey!.
	[Reply w/Quote]

07-10-2009, 08:58 PM	#15
bobditts banned Age: 25 Join Date: Aug 2008 Posts: 947 Location: User is: OffLine	Re: exhaust manifold bolt size went to Ace Hardware today and they have all the sizes needed. Their hardware section RULES!!! did you know they sell chrome bolts and other small hardware accessories????
	[Reply w/Quote]