Cylinder Head Damage - Manifold Stud

[CoronaClassicPerformance]

Evening all,

I’ve removed the cylinder head from a spare 1500 engine I’ve had sat in the back of the garage and I’ve noticed this damage to the casting around one of the studs holes.

Was just wondering if anybody else has had anything similar and whether or not it’s likely to cause any problems down the road (excuse the pun). I was thinking of using it as an exchange unit for a reconditioned head, but now guessing that it won’t be acceptable. Any thoughts?

Aaron

[Pete Lewis]

This is caused by oil or debris in the threaded holes , the studs should have slot cut down the thread so you cant hydraulic the casting

It may also be due to overtighening but it looks like hydraulic damage.

Have the studs got the slot in ?? (Only cut in one end )

pete

[CoronaClassicPerformance]

Cheers Pete.

I was originally thinking over-tightening. I’ll have a look at the studs when I get around to extracting them later this week.

Do you think using a head with this kind of damage is likely to cause any major problems?

Aaron

[DerekS]

Aaron, has the head been dropped or "knocked" on to the stud recently? That is fresh damage, there's no corrosion on the cast iron, it doesn't look like a historical problem. 

[CoronaClassicPerformance]

Not to my knowledge, no. It’s been sat under a sheet in my garage for the past three months since I bought it.

I thought it looked relatively recent too as the crystalline structure of the iron is clearly visible. Maybe somebody has given it a whack with a steel hammer to try and loosen the head? Might explain why none of the head nuts were torqued down when I came to take it off and the clutch retaining screws are all mangled. ?

 

[Pete Lewis]

Muzt take more tablets  , Its the head studs with a slot dont think they did that on manifold studs ,  the same burst can happen but thats looking fresh.

Bet the washers on the head were dished , most are awful and  thats where any torqure get lost , but from what  you say its been 

Messed with by a wrong spanner alien.

Pete

 

[JohnD]

11 hours ago, derekskill said:

Aaron, has the head been dropped or "knocked" on to the stud recently? That is fresh damage, there's no corrosion on the cast iron, it doesn't look like a historical problem. 

There are apparent witness marks on the stud, opposite the face damage, as if it has met a stone or concrete recently.

I'd say, chuck that stud,  it may be bent, refit new and then ignore the damage.   It's well away from where you need a seal.

J.

[NonMember]

I agree with John, that stud wants replacing but as long as the damage doesn't extend beyond what the photo shows the head should be fine.