Outer Limits 4x4 Board

I am thinking of getting a 6.5 chev diesel fitted to my patrol. I have not as yet decided to go ahead because of forums in the USA with people there who seem to be having problems with cracked cylinder heads and also the blocks cracking near the main bearing webs.

Does anyone have any opinions on these engines?

Dude welcome to the board.

I don’t know much about the engines themselves apart from quite few rigs have them in WA. I assume you are getting it from Brunswick. What have they said about this?

Maybe wait till the next gymkana and ask some of the guys that run them.

I can understand why you would be concerned about this when you look at the price of the conversion!!

Malcolm wrote:Does anyone have any opinions on these engines?

try searching, theree was a massive thread on this 12 mths ago by a few people on the board here who install them.

Unless you have to have the extra grunt, go the 6.2. Only slightly less grunt etc but they run a bit cooler. Also you're not as likely to need an upgrade on the driveline at a later date. Talk to Scotty at Brunswick, they did a good job fitting mine.


Al

theres a low klm 6.2 in forsale section

The block cracking in the main bearing webs is a problem with early 6.2L.

The block casting was modified, with thicker webs, when the 6.5L was introduced. Later 6.2L use the same casting (just a smaller bore).

Most head cracking can be repaired by fitting a sleeve in the water passage that the crack is in.

Later 6.5L have a high output water pump to cure this. The problem is hot spots in the head forming pockets of steam. The pockets of steam prevent water contact with the metal and thus poor heat conduction. The HO (high output) pump is able to flush the pockets of steam out of the heads.

Retro fitting the HO pump to earlier models in not practical. The HO pump is driven in the reverse rotation by a serpentine belt.

You have probably also heard of the problem with broken crankshafts. It is generaly believed that this is due to harmonic balancers with deteriorated rubber element. If there is any sign of the rubber bulging out, the balancer should be replaced. Also, if the bolt retaining the balancer is not torqued correctly the keyway in the crank flogs out.

Get an Isuzu engine from a truck instead. Either 4 or 6 cyl Isuzu (both are better than chevy diesel) and these trucks are everywhere here. BTW Isuzu designed the 6.6L duramax engine that replaced the 6.5L in chevy trucks.

can you fit the 6.5 or 6.2 TURBO in a GQ?? Apparently Brunswick told a mate no that you cant?

carful with the 6.5 they had there steering pump combined with the...jeesh i cant even remember atm but they had a big problem with them failing after a while since it was running double duty...now im realy goona be pissed till i figure it out

Bush65 wrote:Get an Isuzu engine from a truck instead. Either 4 or 6 cyl Isuzu (both are better than chevy diesel) and these trucks are everywhere here. BTW Isuzu designed the 6.6L duramax engine that replaced the 6.5L in chevy trucks.

This sounds like a better option dude....when the wheels fell of my landcruiser with caravan in tow, an Izuzu tilt tray dragged us back to the nearest town, cruiser, van and all, twice as fast as the old 60 could drag the van with a tail wind....
Boy they have some torque! That truck had 4.5 tonne on its back.
Andrew