Gun7354 · Oct 3, 2023

Hi knowledgable folk,

So whipped the head off and after borrowing 2 x valve spring compressors (both bent) I've order a decent one. So....are 2.25 valve springs a pain to compress? Also I've noticed one of my exhaust valve spring is sitting higher than the rest (please see pic). Does anyone know what could cause this before a remove the valve? The valve is seated the same as the remaining ones in the head but the spring is slightly higher.

Thank you all

Rich

steve2286w · Oct 3, 2023

Probably best to remove them and know for sure what the issue is, are the collets seated properly .
i use a hammer and socket to remove them quick tap and collets pop out take care not to lose them.

the manual has the spring free length for inners and outers and also what length when compressd under load also dims on valves etc.

Gun7354 · Oct 3, 2023

Thanks Steve,

I'll try the hammer trick and have a look. I'll let you know the findings.

Rich

Gun7354 · Oct 5, 2023

Amazing what you find when you start digging. So hitting the collets with a hammer worked perfectly Steve, thank you.

Before I begin the world of grinding and cleaning I have a small crack across the valves (see photo). They don’t go any further so I’m thinking to leave well alone. The truck was running well but needed to change the valve stem seals.

Any thoughts greatly appreciated

Rich

steve2286w · Oct 5, 2023

thats a shame, If It was ok before I’d be tempted to reuse with the cost from turner engineering £900 , one on eBay for £120 but condition unknown, you could post in the sales and wanted on the forum, someone may have a spare.
most likely between The valves would be a water passage and if it went all the way through would cause issues, might be the time to consider some new valve seats in for unleaded fuel?
you might be able to get it pressure tested which would confirm if ok or not

Gun7354 · Oct 5, 2023

Gonna reuse Steve. Was fine before so will lap the valves in and see how it goes. Robust cast iron

Thanks mate

Rich

kermit_rr · Oct 5, 2023

Looks like a scratch rather than a crack. At least in the pic. Don't worry

Gun7354 · Oct 6, 2023

Turboman · Oct 6, 2023

Gun7354 said:
Amazing what you find when you start digging. So hitting the collets with a hammer worked perfectly Steve, thank you.

Before I begin the world of grinding and cleaning I have a small crack across the valves (see photo). They don’t go any further so I’m thinking to leave well alone. The truck was running well but needed to change the valve stem seals.

Any thoughts greatly appreciated

Rich

That looks like a crack to me. A fine one, but still a crack. It is in the usual place that those heads crack.
If it hasn't gone into the waterways, it might be fine for a while.

Gun7354 · Oct 6, 2023

Thanks Turboman - I’m gonna leave for now and if it goes….it’ll be time to get a new unleaded head

.

Just on the theme of cylinder heads and gaskets one of the waterways was blocked off on the gasket (photo). My new comp gasket is the same with the hole omitted

You’ll have to zoom in on the photo, it’s circled in green.

Thanks

Rich

steve2286w · Oct 6, 2023

Think that’s normal, seen it on mine too, will just help put the coolant flow around a different route

Gun7354 · Oct 6, 2023

Did you unblock yours Steve on the gasket?

Rich

steve2286w · Oct 6, 2023

No, it’s likely with the higher pressure/ cooler flow from water pump at the front of engine which is generally cooler the gasket can restrict the flow with the smaller hole and the larger holes towards the back of engine where it will be hotter.

Turboman · Oct 7, 2023

Gun7354 said:
Thanks Turboman - I’m gonna leave for now and if it goes….it’ll be time to get a new unleaded head .

Just on the theme of cylinder heads and gaskets one of the waterways was blocked off on the gasket (photo). My new comp gasket is the same with the hole omitted

You’ll have to zoom in on the photo, it’s circled in green.

Thanks

Rich

They are all like that.

Gun7354 · Oct 16, 2023

Thank you for all your help. As an update - head back on, new fuel pump and all back together. Turned it over a few times to fill up the oil filter etc. Put the HT lead on and it started first turn which was great, nice and smooth, got it to working temp and about to turn off then a horrible tappet noise.

Rocker back off and one of the Tappets was way off (I’d adjusted them and double checked). So thinking I’d adjusted it whilst it wasn’t seated in the cup correctly! Anyway all checked again then fired the Landy up. This time it was missing. So…pulled off the leads one by one until I touched No 1 which gave me a shock. Fitted a spare, all fixed.

So…was worth taking the head off and giving it a dig out. Been on a road test tonight and it pulls better and ticks over beautifully.

Think I’ll have to re-adjust the tappets after 100 miles or so. It’s funny (read annoying) how a landy can throw a curve ball in when you think all is well

steve2286w · Oct 16, 2023

Looks good, well done, it’s a sinking feeling when you get it together and doesn’t sound as you hoped it would followed by the best feeling when you sort the simple error

did you find the cause of the valve spring higher that others

Gun7354 · Oct 16, 2023

Yes Steve I did mate - sorry for not following that up but it was the valve cap. I ordered a NOS from JCs and it fitted perfect. Funny how only one was so worn it made the collets sit deeper in the cap. Could have been lack of oil in its previous life.

Rich

steve2286w · Oct 16, 2023

Every day a school day

Gun7354 · Nov 19, 2023

Hi all - all is going well at the moment - 100 miles in and running well. Quick question - do I need to re-torque the head down after a period of mileage? Im thinking 500 miles then check tappets and head bolts.

Thank you all

Rich

Hicap phill · Nov 19, 2023

Gun7354 said:
Hi all - all is going well at the moment - 100 miles in and running well. Quick question - do I need to re-torque the head down after a period of mileage? Im thinking 500 miles then check tappets and head bolts.

Thank you all

Rich

I only checked tappets
Unsure what the book says(if anything)

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