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MGB And now, NO ARP head studs to be found!

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DrEntropy

DrEntropy

Great Pumpkin
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Being uncertain just how many times the existing studs have been torqued down, thought it prudent to replace 'em with an ARP stud "kit."

"Out of Stock"

"Back Ordered"

Lots of sites have 'em listed as "SPECIAL!" for under $100.00 tho. Great price when they can't be bought!

One guy even laughed at me, sayin': "You're sh** outta luck, buddy. Don't know who you could call."

Shoulda had a set sitting here along with all the other spares. *sigh*
 
No, their website indicated "out of stock" so I was hoping to find someplace with a "kit" still on the shelf. Most of the "usual suppliers" have an April 10th-ish date as restock. No doubt with a price increase. May call them (ARP) tomorrow.

Waiting to see what gasket Moss has sent, may see that tomorrow as well.

Only got so far as to "de-coke" the valves today. Side tracked with cleaning things and running thread chasers.
 
So, new seals and springs installed after re-seating the valves. The exhaust seats were slightly pock-marked and took some time to lap in but look good to go now. Settled on using a head gasket from BP Northwest: AK660-C. The "C" is for COPPER! Looks to be a fair substitute for the original Payen "sandwich" one. We'll see...

Hopefully assemble today, had delays for some of life's interventions. If this fixes the engine issue it's on to diff ring-and-pinion R&R and new rear seals/bearings, along with driveshaft replacement. That's the last of the running gear renewal for this "Frankenstein" MG. There's evidence the poor thing had a different engine (V-6 or V-8?) at some point, holes in the frame up front and a lot of other oddities when we got it. The diff is a later one, certainly not original to the car. The engine is from another B, we built it out back in the early '90's. It then made a 100-mile daily commute for nearly a decade. We did a rebuild of the bodywork in 2005~6, repainting it back from Amana/Frigidare white to OEM Old English White. Certainly no concourse example, just a good driver.
 
I'd rather have a good driver on the road, than a perfect specimen in a trailer!

Racing Traveller.gif

hubba hubba
 
The early head studs are quite durable so I wouldn't worry about changing them in a hurry. Maybe put in a back order and forget about it until the ARP versions show up.
 
billspohn said:
The early head studs are quite durable so I wouldn't worry about changing them in a hurry. Maybe put in a back order and forget about it until the ARP versions show up.
Click to expand...
Yup. Bolted down on the originals. Just considered that since I was "in there" the ARP studs would just be prudent. No problem with the existing ones, certainly under-stressed at the 50lb/ft point.
 
I solved it on my race car by grafting a Twin Cam head onto an MGB block - the bigger studs torque to 70 lbs.? :p
 
I've a spare engine (disassembled) I'd been considering a rebuild on. Not that I'd make it into a T/C mill but: did you have to do much machine work to fit up that head (I assume it was an MGA T/C head) to the 1800? And what did you bore out to?
 
ISTR you went +0.040" ?
 
DrEntropy said:
I've a spare engine (disassembled) I'd been considering a rebuild on. Not that I'd make it into a T/C mill but: did you have to do much machine work to fit up that head (I assume it was an MGA T/C head) to the 1800? And what did you bore out to?
Click to expand...

It was actually a tremendous amount of work. I used a modified Twin Cam head (flowed, larger valves) on an 18GB block remachined to take the new stud locations, with a competition 5 main crank, punched out to 1950 c and using some Cosworth cam profiles and specially made 12:1 forged pistons.

It was worth the trouble, though, and an interesting exercise.

Details here http://www.rhodo.citymax.com/f/Twin_Cam_conversion.pdf

mgatc.jpg
 
Downloaded/read the .PDF. That IS a tremendous amount of work! Congratulations.

I think it'd be a better deal here for a street driven MGB to engineer putting one of my spare Lotus T/C mills & a Ford gearbox into it!
 
DrEntropy said:
Downloaded/read the .PDF. That IS a tremendous amount of work! Congratulations.

I think it'd be a better deal here for a street driven MGB to engineer putting one of my spare Lotus T/C mills & a Ford gearbox into it!
Click to expand...

There are numerous other more modern DOHC engines with modern fuel injection available. I have seen Toyota 4AGE, Honda S2000, Miata, Ford Duratec etc.

I have sworn off doing any more transplants since doing my Jamaican MGA with 3.4 GM V6, but I 'twitch' when I think about a modern GM LNF Ecotec in an MG. I have one in one of my street cars (09 Solstice GXP coupe) that I have mildly tuned to 375 bhp/375 Tq.

Pretty much all the modern DOHC engines have the same look as the Lotus did - flat topped cam covers. The Twin Cam looked like a baby Jaguar motor!

MGA_engine_compt.jpg
 
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