Evening all,
Whats the thread size in the cylinder head for the inlet & exhaust manifolds on a 3.9 Rover V8...?
I'm in need of a helicoil or 5...!
Thanks in advance.
Thread sizes
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Re: Thread sizes
3/8 unc for the exhaust and I think the inlet is the sameBlackflag533 wrote:Evening all,
Whats the thread size in the cylinder head for the inlet & exhaust manifolds on a 3.9 Rover V8...?
I'm in need of a helicoil or 5...!
Thanks in advance.
Regards Denis
1950 A40 Devon Hotrod with 5.0 twin turbo RV8.
EDIS8 wasted spark, Holley Injection.
Been as far as the Moon and back in 57 years of driving. Same Car, 5 engine upgrades !!!
EDIS8 wasted spark, Holley Injection.
Been as far as the Moon and back in 57 years of driving. Same Car, 5 engine upgrades !!!
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Blackflag533
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Re: Thread sizes
Hello Denis,DEVONMAN wrote:3/8 unc for the exhaust and I think the inlet is the sameBlackflag533 wrote:Evening all,
Whats the thread size in the cylinder head for the inlet & exhaust manifolds on a 3.9 Rover V8...?
I'm in need of a helicoil or 5...!
Thanks in advance.
Regards Denis
That was quick!!
Thanks very much.
They are both 3/8 UNC.
Typically there is enough depth of thread in the heads to use longer studs / bolts on the exhaust if you clean/tap them out. The inlet is of course at an obtuse angle so you have to be really careful running a tap down them but I'm pretty sure there is quite a bit of room in them to use 1/4" longer bolts as well.
Typically there is enough depth of thread in the heads to use longer studs / bolts on the exhaust if you clean/tap them out. The inlet is of course at an obtuse angle so you have to be really careful running a tap down them but I'm pretty sure there is quite a bit of room in them to use 1/4" longer bolts as well.
Dave
