4.6 block rebore?

Seight-V8 · Post by **Seight-V8** » Mon Mar 24, 2008 7:57 pm

hiya all,

Where would be the best place to get my 4.6 block re-bored.

Anyone got some good places to recommend.

I'm up in the north-east of england...so local ish would be nice.

I'm not after flanged liners, just a standard rebore.

cheers

scott richmond

ChrisJC · Post by **ChrisJC** » Mon Mar 24, 2008 8:12 pm

There isn't a factory specified rebore on the 4.0 & 4.6 blocks. I guess they think the liners are thin enough already.....

Chris.

TVRleigh · Post by **TVRleigh** » Mon Mar 24, 2008 11:58 pm

There is not a option to re-bore the 4.0 as you can't get +10 pistons or rings

but on the 4.6 you can get +10 and +20 piston and rings.

Try V8 Developments.

CastleMGBV8 · Post by **CastleMGBV8** » Tue Mar 25, 2008 12:34 am

V8 Tuner has +20 4.6 pistons. If the Block has a blob of red paint in the valley you should be ok but it would probably be wise to have the block pressure tested before doing any boring. Check that all the liners are level with the tops of the block, it should be obvious if any of them have moved.

Kevin.

TVRleigh · Post by **TVRleigh** » Tue Mar 25, 2008 11:48 am

I can tell you where not to take it

Via PM.

Seight-V8 · Post by **Seight-V8** » Tue Mar 25, 2008 9:00 pm

hiya all,

so far i think my 4.6 block looks ok.

The cast date shows 1997.

And its got 3.0 written on the inside of the valley.

Reading the books this means it's got 3.0mm between the casting and the liner.

And the liners are sat on a small shoulder right at the base of the cylinders, so they shouldnt drop.

So hoping pressure test will be ok.

cheers

scott

CastleMGBV8 · Post by **CastleMGBV8** » Tue Mar 25, 2008 9:41 pm

Scott

Does it really need a rebore, most 100k mile engines are ok with just a hone. Have you had the bores checked, if within tolerances you could spend the money more effectively on some head work and possibly a fast road cam.

Kevin.

HairbearTE · Post by **HairbearTE** » Tue Mar 25, 2008 11:29 pm

I think B+H autokraft are in the NE and can T-hat the block too themselves if you wanted to go that way. Don't know how good they are but i've heard nothing bad about them.