4.6 engine spec, special parts etc please

[Alun Ivor]

I have a wonderful 2000 4.6 chim, blowing oil out everywhere, when re building engine, is engine stock Rover parts or do Tvr change cam,pistons, con rods etc and any special balancing required, who knows the true engine spec and does the bible tell all? Who sells the engine parts Inc oil pump etc. Thanks guys.

[haircutmike]

The 4.6 is a Range Rover engine, as for what spec and what is fitted, who knows?

Strip and ye shall find!

[King Fisher]

haircutmike said:

The 4.6 is a Range Rover engine, as for what spec and what is fitted, who knows?

Strip and ye shall find!

It's got a different crank to a Range Rover engine, look at the sump, there's a big dent on the forward part of it; TVR Power's hammers put that there, to clear the larger crank.

[pwd95]

Thought they just used a different cam shaft & mapping.
Some may have had BV heads.
The youngest is over 10 yrs old now so goodness knows what's in there. As said above, strip it & see.

[haircutmike]

King Fisher said:

haircutmike said:

The 4.6 is a Range Rover engine, as for what spec and what is fitted, who knows?

Strip and ye shall find!

It's got a different crank to a Range Rover engine, look at the sump, there's a big dent on the forward part of it; TVR Power's hammers put that there, to clear the larger crank.

It's the 5.0 with the different crank and the hammered sumps, 4.6's are all rangie.

[Alexdaredevilz]

Are we talking Tvr 4.5 or range rover 4.6 here?

[debaron]

AFAIK - The 4.5 TVR is the same as the Range Rover 4.6 but with TVR reworked heads and a sportier cam with the intermediate Serp / preserp timing cover (ie not the GEMS timing cover) for dizzy drive.

ETA - because of the timing cover differences, the RR sump would not fit a TVR

Edited by debaron on Wednesday 23 May 14:14

[haircutmike]

debaron said:

AFAIK -
ETA - because of the timing cover differences, the RR sump would not fit a TVR

Edited by debaron on Wednesday 23 May 14:14

Agreed, but crank etc all rangie on a 4.6 and nothing special.

[Ant.]

A tvr 4.5 and a chimaera 450 are different engines with regard to crank,block,heads etc

[haircutmike]

[quote=Ant.]A tvr 4.5 and a chimaera 450 are different engines with regard to crank,block,heads etc[/quote

Do you mean a 450 is different from a 4.6?

If not, I'm all ears!

[Alun Ivor]

thanks guys,mmmmm im gonna ring Dom at TVR Power tomorrow and will post what he says on the subject, I think its right you pull her apart and be ready for anythng?

[Ant.]

haircutmike]nt. said:

A tvr 4.5 and a chimaera 450 are different engines with regard to crank,block,heads etc[/quote

Do you mean a 450 is different from a 4.6?

If not, I'm all ears!

No, a 450 Chimp is the same as a 4.6.

A TVR 4.5 is iceberg crank(small journal) ,14 bolt heads, probably pre-serp. 4444cc.

Think NCK engines ........

[haircutmike]

Ant. said:

haircutmike]nt. said:

A tvr 4.5 and a chimaera 450 are different engines with regard to crank,block,heads etc[/quote

Do you mean a 450 is different from a 4.6?

If not, I'm all ears!

No, a 450 Chimp is the same as a 4.6.

A TVR 4.5 is iceberg crank(small journal) ,14 bolt heads, probably pre-serp. 4444cc.

Think NCK engines ........

I'm with you, like used in Tuscans?

As to 4.5 being the same as 4.6, I thought Rob told a different story

[Alun Ivor]

so if im right an april 2000 chim 450 is a rover cranked engine with sportier cam, could have all bin put together by Rover then? tvr must do something with the heads i aint known a ROVER rip my head off like my girl can,lol still feels so strong no smoke what so ever and excelerates as per spec!!! no real engine noise, but oil out crank seals,sump,timing cover, even in inlet manifold area, what can be so bad as to cause an engine with 45,000 to be so nice but so fked, terrible abuse is all i can muster, or ROVER really were crap?

[Alun Ivor]

ok and re worked heads by tvr, gotcha.

[Ant.]

haircutmike said:

I'm with you, like used in Tuscans?

As to 4.5 being the same as 4.6, I thought Rob told a different story

Yes, the Tuscan challenge engines for instance....

[Alun Ivor]

yeah exactly, indirectly Ive learnt the difference between the race engnes and the stock ones used in the chim, anybody had Dom at Tvr Power build them an engine, what spec, and difference to performance figures if any,does it sing, oh and im interested in low to mid range massive torque figures, how do you tune engine to suit, errr are the pistons different in the tvr from landie?????

[Alexdaredevilz]

I always thought the Tvr 4.5 chim 450 and rr 4.6 were all slightly different

[King Fisher]

haircutmike said:

It's the 5.0 with the different crank and the hammered sumps, 4.6's are all rangie.

How come my sump has a big hammer mark in it?

[haircutmike]

King Fisher said:

haircutmike said:

It's the 5.0 with the different crank and the hammered sumps, 4.6's are all rangie.

How come my sump has a big hammer mark in it?

My rangie 4.6 didn't but the 5.0s have because of the throw of the crank.