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-   -   95 3.9l 10 bolt or 14 bolt head (http://www.defendersource.com/forum/f6/95-3-9l-10-bolt-or-14-bolt-head-26161.html)

kolvedic June 24th, 2010 03:15 PM

95 3.9l 10 bolt or 14 bolt head
 
I am ready to pull the heads and was looking at the workshop manual and it shows a 14 bolt pattern. I can only find 10 bolts on mine. So I am actually not finding the other 4 or is there actually a 10 bolt head on a 3.9l? If so, is there a 10 bolt tightening pattern?

I saw a reference in another thread about this possbility but I just wanted to be sure.

thanks
Bill Lewis

------ Follow up post added June 24th, 2010 03:36 PM ------

Nevermind, I found the 10 bolt pattern in the Rave. I looked at that page several times but finally saw it.:)

------ Follow up post added June 24th, 2010 04:38 PM ------

But now noticing it says suffix B for the serial number for this pattern, do I have to specifically order the composite gaskets? It says the metal ones are for non-suffix B engines, composite for suffix b. I would assume it matters but I have read lots of threads where people said to get the new composite gaskets without regard for engine serial number.

kolvedic June 24th, 2010 10:15 PM

I'd like to bump as I am trying to get these fI&(UI head bolts off but they won't budge. Wondering if anyone has had the same problem? Or maybe how to get them loose?:)

Grover June 24th, 2010 10:25 PM

Quote:

Originally Posted by kolvedic (Post 227880)
I'd like to bump as I am trying to get these fI&(UI head bolts off but they won't budge. Wondering if anyone has had the same problem? Or maybe how to get them loose?:)

Breaker bar plus a 2 foot cheater bar. It took everything I had, but I got 'em loose. The rears are in a tight space, be very carefull not to strip the bolt theads. Good luck.

kolvedic June 24th, 2010 10:30 PM

Rock on thanks! I had started with the cheater bar but was kind of afraid to go too hard. I think I need more beer and bigger friends.:)

Turbofan June 24th, 2010 11:48 PM

Make sure you have enough beer for bolt 8 on the left head. It's more than a one beer bolt!

kolvedic June 25th, 2010 12:35 PM

Thanks guys. I got the left one broke loose but a socket paid the price. I guess it is nice to know the socket split before it did anything to the bolt.

Antichrist June 25th, 2010 02:53 PM

Both my 3.9's had 10 bolts.
I used a 1/2" drive 6pt impact socket, 18" breaker bar and hi-lift jack handle.
Most came easy enough, but a few took a lot.
Also make sure you clean any gunk away from around the bolt heads so the socket seats completely.

evilfij June 25th, 2010 02:55 PM

If you had metal gaskets, to upgrade to composite, you should either fit a set of later heads or have yours skimmed. A lot of people just put on composite gaskets without doing either.

kolvedic June 25th, 2010 03:10 PM

ok. I was just confused that mine has the 10-bolt which I am assuming makes it a suffix B engine. That engine is supposed to have composite gaskets and has a different set of torque specs (15 ft/lbs + 90 deg. + 90 deg) instead of 60 Nm/90 Nm. anyone know which torque specs need to be used?

I have also been over the inspection list in the cylinder head and valve sections. Anyone have anything else to look out for?

thanks for all the help guys,
Bill

So I am going to ask but I think I know the answer, should I have the heads rebuilt while they are off?

kolvedic June 25th, 2010 07:45 PM

Ok, any recommendations on getting the two right-hand lower rear bolts out of the exhaust?

Frank84 June 25th, 2010 08:19 PM

Quote:

Originally Posted by kolvedic (Post 228016)
Ok, any recommendations on getting the two right-hand lower rear bolts out of the exhaust?

If you are talking about the exhaust manifold to head bolts just leave them there and remove the head and manifold as an assembly since you're taking the head off anyway.

evilfij June 25th, 2010 09:27 PM

Torque specs (really the bolt that you use) coinside with the type of gasket.

kolvedic June 25th, 2010 11:40 PM

Thanks for all the help guys. I got everything off and headed to the machine shop tomorrow.


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