06-18-2016, 11:44 AM
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#1
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Registered User
Join Date: May 2011
Location: weehawken nj
Posts: 240
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3.4 head on 3.6 block, which head gasket to use?
I put together a factory 3.6 engine block ( different pistons ) and want to use the 3.4 head gaskets and cylinder heads
I noticed that the part numbers for the 3.4 and 3.6 head gaskets are totally different.... has anyone done this before? I dont want to start mixing oil and antifreeze together....
Any help is very appreciated.
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06-18-2016, 01:04 PM
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#2
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Registered User
Join Date: Jun 2014
Location: LB, Germany
Posts: 1,512
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Hello,
i've never done this in person.
The bore of the 3.4 and the 3.6 litre engine seems to be the same – 96mm. But from what i've read i think they have changed the water channel flow between this two engine versions and that is why there are different gaskets.
Maybe somebody else has a more precise answer.
Regards, Markus
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06-18-2016, 03:37 PM
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#3
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Registered User
Join Date: Oct 2008
Location: O.C. CA
Posts: 3,709
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That's incorrect, they are nearly identical except for the placement of the uppermost bolt hole for the timing chain well. you will have to re-drill a hole closer to the chain well.
Buy a 3.6L head gasket & place it on the case & you will see.
__________________
OE engine rebuilt,3.6 litre LN Engineering billet sleeves,triple row IMSB,LN rods. Deep sump oil pan with DT40 oil.
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06-18-2016, 05:18 PM
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#4
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Registered User
Join Date: Aug 2009
Posts: 1,466
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After I had my cylinders redone by LN they recommended the 3.6L head gasket And I originally had 3.2 heads fit perfectly nothing had to be done to make them fit.
__________________
2003 Black 986. modified for Advanced level HPDE and open track days.
* 3.6L LN block, 06 heads, Carrillo H rods, IDP with 987 intake, Oil mods, LN IMS. * Spec II Clutch, 3.2L S Spec P-P FW. * D2 shocks, GT3 arms & and links, Spacers front and rear * Weight reduced, No carpet, AC deleted, Remote PS pump, PS pump deleted. Recaro Pole position seats, Brey crouse ext. 5 point harness, NHP sport exhaust
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06-18-2016, 05:33 PM
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#5
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Registered User
Join Date: Oct 2008
Location: O.C. CA
Posts: 3,709
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Quote:
Originally Posted by jsceash
After I had my cylinders redone by LN they recommended the 3.6L head gasket And I originally had 3.2 heads fit perfectly nothing had to be done to make them fit.
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Due to your 3 chain engine, 5 chain is different.
__________________
OE engine rebuilt,3.6 litre LN Engineering billet sleeves,triple row IMSB,LN rods. Deep sump oil pan with DT40 oil.
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06-19-2016, 04:49 PM
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#6
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Registered User
Join Date: May 2011
Location: weehawken nj
Posts: 240
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Quote:
Originally Posted by BYprodriver
That's incorrect, they are nearly identical except for the placement of the uppermost bolt hole for the timing chain well. you will have to re-drill a hole closer to the chain well.
Buy a 3.6L head gasket & place it on the case & you will see.
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I did drill the 3.6 engine block to bolt the uppermost bolt of the early 3.4 head.
So I should use 3.6 head gaskets? I bought a 3.6 head gasket to overlay on the 4-6 3.4 head gasket... Aside from bolt closest to the chain, it looked very similar.
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06-20-2016, 04:02 PM
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#7
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Engine Surgeon
Join Date: Aug 2008
Location: Cleveland GA USA
Posts: 2,425
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You do realize the timing chains are different lengths for 3 and 5 chain?
You must use the head gasket that matches the heads, not the block.
__________________
Jake Raby/www.flat6innovations.com
IMS Solution/ Faultless Tool Inventor
US Patent 8,992,089 &
US Patent 9,416,697
Developer of The IMS Retrofit Procedure- M96/ M97 Specialist
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06-21-2016, 05:41 AM
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#8
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Registered User
Join Date: May 2011
Location: weehawken nj
Posts: 240
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Quote:
Originally Posted by Jake Raby
You do realize the timing chains are different lengths for 3 and 5 chain?
You must use the head gasket that matches the heads, not the block.
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Yes, I split the block open and replaced the timing chains.
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