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Posted: Sat Feb 04, 2012 9:18 pm
by mgbloke
It was right by one end long bolt boss, if that makes sense. It was a tiny flaw as the repair weld is only about 10mm long. Aparently caused by the molten aluminium solidifying too fast.
Strange how it was OK for 18 months though!
I have pics somewhere.
Mark
Posted: Sun Feb 05, 2012 3:30 pm
by JP.
mgbloke wrote:It was right by one end long bolt boss, if that makes sense.
Not realy, if it was in Dutch I probably would understand...
mgbloke wrote:I have pics somewhere.
Yes please, would be very helpful for me to locate a posible issue.
Posted: Sun Feb 05, 2012 4:10 pm
by mgbloke
You can see pink antifreeze. Its not a crack but a very small flaw in the casting.
Posted: Sun Feb 05, 2012 4:18 pm
by mgbloke
Forgot to mention that when I got the heads back from RS they had reduced the size of the outer bosses so now I need only 3 long studs and 7 short.
Mark
Posted: Tue Feb 07, 2012 7:42 pm
by JP.
Thanks. The picture made all clear. Its time to remove the valve covers to investigate......... well when temperatures get a bit better outside...under the carport...
The warmed garage is still occupied, with another project which is not forum related as it there's a V6 involved with it..
Posted: Thu Feb 09, 2012 4:06 pm
by kokkolanpoika
Any new dyno results????
Friend of mine is buying set of Merlin head when they are again in the market..
Posted: Thu Feb 09, 2012 5:09 pm
by mgbloke
Timo
I took the car to different rolling road to have the timing set. They sais it was 336bhp and they would email the results but I never got them despite reminding them 3 times. In future I will stick to circuit motors at Castle Combe.
To me it feels like more than 10bhp extra
Am having some custom head studs made as I really dont like the Bolts after stripping a thread. They are now all helicoiled.
Mark
Posted: Thu Feb 09, 2012 7:04 pm
by minorv8
Mark, looks like you have extra pedelstals with Yella Terras. I think I had some problems trying to get them fit.
Posted: Thu Feb 09, 2012 8:57 pm
by Alexchim
336 at the wheels?
Posted: Thu Feb 09, 2012 10:28 pm
by mgbloke
Hi Jukka
Yes the ally end supports that came with the heads are too chunky to fit with the yella terras. Made thinner steel ones.
Alexchim
336 at the flywheel as I said I have no printout, just their word for it.
Will be back on the dyno at Circuit motors soon.
Mark
Posted: Fri Feb 10, 2012 6:05 am
by kokkolanpoika
What about rear wheels? near 300?
Posted: Sun Mar 11, 2012 8:24 am
by mgbloke
Well what can I say!
One Merlin head is leaking coolant again and in the same place.
Is it dooable to get it repaired using ally Tig welding?
Was thinking I could bolt the head to my spare block while it is welded to try and prevent any distortion.
Going to run the engine up to temp later then remove rocker cover and try and pinpoint the leak.
RS had them laser welded with the actual weld being just a few mm wide.
I need to get this sorted quickly as I have a trackday in 2 weeks on the GP circuit at Silverstone.
Any advice welcome.
Thanks
Mark
Posted: Sun Mar 11, 2012 10:20 am
by bigaldart
Posted: Thu Dec 06, 2012 9:55 pm
by mgbloke
Just as an update.
Real Steel supplied a bottle of Moroso ceramic sealer FOC which i used and has done the trick. Engine has been going well this year.
Mark
merlin heads
Posted: Sat Dec 15, 2012 11:08 pm
by little tub
I have a standard 4.6 rover engine with merlin F85 heads. The car is currently being upgraded from webber carb to injection. When i get the car back i will get it on a rolling road and post the dyno results if anyone is interested?
