95 3.9l 10 bolt or 14 bolt head - Defender Source
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  #1  
Old June 24th, 2010, 03:15 PM
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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.
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  #2  
Old June 24th, 2010, 10:15 PM
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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?
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Old June 24th, 2010, 10:25 PM
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Quote:
Originally Posted by kolvedic View Post
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.
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Old June 24th, 2010, 10:30 PM
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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.
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Old June 24th, 2010, 11:48 PM
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Make sure you have enough beer for bolt 8 on the left head. It's more than a one beer bolt!
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Old June 25th, 2010, 12:35 PM
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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.
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Old June 25th, 2010, 02:53 PM
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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.
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Old June 25th, 2010, 02:55 PM
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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.
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Old June 25th, 2010, 03:10 PM
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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?
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Old June 25th, 2010, 07:45 PM
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Ok, any recommendations on getting the two right-hand lower rear bolts out of the exhaust?
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Old June 25th, 2010, 08:19 PM
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Originally Posted by kolvedic View Post
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.
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  #12  
Old June 25th, 2010, 09:27 PM
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Torque specs (really the bolt that you use) coinside with the type of gasket.
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  #13  
Old June 25th, 2010, 11:40 PM
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Thanks for all the help guys. I got everything off and headed to the machine shop tomorrow.
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