New Head Gaskets

**Pedro_The_Swift** · 24th January 2017, 06:04 PM

Originally Posted by garrycol

I thought this discussion had been had on the forum a few times now - the majority of Disco 2 4.0s sold in Aust were low comp (V8s sold in North America were all HC as were most in the UK) - plenty of people on here have low comp 4.0s - the source engine for my 4.6 built was a low comp engine.

Garry

Yea, ok. AFAIK all the Thors were identical, the ONLY difference between the two sizes were the crank throw and piston dish amount.
The only way (apart from aftermarket flat tops) to get an increase in comp (and you cant in the 4L without ^^) in the 4.6 was to run 4L piston/rod assembly.

Buick 215 Rover 3.5 Land Rover 4.0 and 4.6 differences

**ozscott** · 24th January 2017, 06:30 PM

I'm searched up my engine number for my 4 0 01 2002 complianced and it was high compression. Cheers

**ozscott** · 6th February 2017, 08:27 AM

Hi all,

ARP must not have realised that their kits shipped with a recommended 100lb torque in the instructions...

Here is ARP's email answer to me about 100lb of torque (I used 75lb):

"We don't sell or recommend head gaskets, no idea what is best for your application.

The final torque on the nuts for your application is 70 ft/lbs, see attached instruction sheet. If you torque the nuts to 100 ft/lbs you will probably break them all.

Best regards,

Alan Nichols
Sales & Technical

Automotive Racing Products
1863 Eastman Ave.
Ventura, CA 93003
Toll Free: 800-826-3045
Ph: 805-339-2200
Fax: 805-650-0742
Email: alann@arpfasteners.com"
ARP | The Official Web Site

**101RRS** · 6th February 2017, 09:55 AM

I hope you have set them straight - I raised this with them nearly 18 months ago and they didnt care to respond.

What a cluster .........

**Andrew D** · 16th July 2018, 06:33 AM

Originally Posted by DAW

I cut my teeth on these engines/cars when i worked for Land Rover.

15ft/lb + 90 Degree on compasite gaskets is what I torqued EVERY RV8 up to. I think last time i checked my work log I had done 86 engines. The factory spec is 15ft/lb 90 deg + 90 deg. This was pulling the thread out the block.

Can anyone else validate this one or is there approximately 86 Land Rovers maintaining the perpetual oil drip philosophy.

I know people are still doing 20Nm +90 deg +90 deg and no issue.

**ozscott** · 16th July 2018, 07:32 AM

Not sure mate.

What I can say is that 1.5 years on and with plenty of k's and towing she is running like a dream. Very happy with the head studs and stock gaskets. Time will tell but I am hopeful. The truth is once minor mods have been made to run them cooler and head studs are used the Thor V8 is a set and forget motor. When not running LPG the coil packs and leads should easily go 100,000k and MAF 50k to 100k depending on what level of tune you are chasing and how keen you are on air filtration. Cheers

**Andrew D** · 16th July 2018, 08:16 AM

I'm using genuine head bolts not the studs.

I'd imagine the mech at LR did the same but to reduce the torque is interesting.

I'm using Victor Reinz gaskets.

Good to hear you are enjoying your handy work.

**Andrew D** · 17th July 2018, 05:35 AM

During the dismantle found the back LHS port with OAT present.

Do people think this is head gasket related.

20180715_115812.jpg

No sign of steam cleaning and I did notice some OAT on the rear of the LHS head prior to dismantle.

Cheers
Andrew

**Pedro_The_Swift** · 17th July 2018, 05:50 AM

isnt that the water port?

its pretty common for them to leak down the back of the block--
I know my two did,,,

**Andrew D** · 17th July 2018, 06:18 AM

I think so taking another look at it.

Possibly the source of the leak also. Bolts weren't overly tight.

The RHS does not look anything similar to it however I did notice an external leak on the LHS.

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