The V8 Owners Forum -

I build 4.6 top hat engine to my friend. We make 0.06mm clearance and 4.0 pistons with 11.1CR. No piston slap hearing. I also build my landy 4.6 top hat engine, 2nd hand 4.6 piston´s and CR ratio will be 10.5CR if use tin gasket. And it has got also 0.06mm clearance. Not yet finished engine. So i ca...

Hi. I do not know what to do. I just rebuild my 5.2L Rover V8. I bought some cometic 96mm head gasket and just fit those. So i fit rocker shaft´s etc, spill some 15w50 Castrol motor oil with rockers, let car stand couple of days. Today i go to underneath car and i notice some oil drip with head/bloc...

I suspect that the oil is leaking from the valley across the block deck and out of the side of the engine. My engine does it very slightly with standard composite gaskets. You could run a smear of instant gasket along both block and head along the valley side. Chris. I think this is not true.. Oil ...

In my mind your problem is with engine magnament system, not trumbet base..
Maybe VR-sensor desync problem or lean/rich spike on fuel map??

I might be a stupid to use my time some porting work, but i try to tied up of TA/wild cat heads on street motor.. Those heads are my old stage 4 home ported, witch will produce 393hp at the flywheel.. Some porting work. Inlet valve seat is ported slightly offset or is it called eccentric? Approx 1mm...

I have got both kit´s, and both stud´s has got same lenght threads.. I´m running 11.8CR with my 393hp street motor. And i use v8 developments compostie 96mm head gasket. They are not good quality like Elring.. And they usually sweat some oil/compression pressure centre on the block.. I will try to u...

I bought mine from John Eales..

He is selling bronze guides, they will need finishing hone to get valves in. Also he has got STD guides, but those have got slightly bigger hole. 8mm stem, but not sure after installation if it is slightly smaller.?

As minimal as could.. ~0.1mm approx? What ever needed..
I build one engine to my friend, and engine numeber still look good after they mill deck..

Yes i measure those clearances.. If use Grant rings, 1rst ring clearance is 0.04-0.05mm in all 8 pistons. And 2nd ring has got 0.03mm.. I fit couple of AE rings and clearance is smaller in those pistons then, in the 1st groove 0.03mm. 2nd has got same as grant.. Difference between AE and Grant has g...

Hi. Found 2 different data for rover 4.0-4.6l piston ring to groove clearance. Page 11. http://www.landroverresource.com/40_46_V8_overhaul.pdf Piston rings Ring to groove clearance: 1st compression 0.05 to 0.10 mm ........................... 0.002 to 0.004 in 2nd compression 0.05 to 0.10 mm ...........

I have got a steel spacer´s + small Wurth bearing/valve spring shim´s between rocker arm and spacer.. You might see those if look presice..
Clearance approx 0.4mm.. Those shim´s are hard and they will imitate bearing´s..

If you want to rev engine high rpm, then YES, but if mild road use, then no..

I use Harland rockers on my RV8 and i use tube spacers..

Some guy in the Finland start to build 3.5litre Rover V8 with those heads´s.. Hi didin´t give us any more info, because it is "prototype".. And i just have a look toyota 2T head´s on my local motorshop, they don´t have those rockers, but head´s are 1:1 identical in the pick.. Bore spaicing is approx...

There must be somethink really really wrong that engine.. I understand H404 cam is quite wild. Very poor idle, very poor drive ability, good mid range, excellent bhp.. Has anyone got any data of this cam? Those vizard head´s has got mammoth valves 50/42mm. I do not understand why so big, they allmos...

Not for 100% sure.. But we think they are from Toyota 2T..

And Alan, my 5.2l give similar torque curve, but only 20Nm more than "Vizard" engine..