12 replies to this topic

[jayh29]

Hi all, anybody have any advice/tips?

I replaced the timing chain and sprockets etc on my 998, it was a real pain to be honest getting the new chain on and as such I had to tap on the new cam sproket...yes you guessed I must have missed a few times and seem to have damaged the thread on the end of the cam so I can't get the nut started. Engine is still in the car but unless anyone can suggest anything I think I might be upgrading.

 

Cheers

Jay.

[leadly]

Can you get a micro file on the thread to repair the damage? Obviously taking care not to get any filings anywhere they shouldn't.

[59 Speed]

You could possibly use a small file to correct the thread taking care not to get any metal filings in the engine, you could make up a cover to shield the engine and also use a magnet to help.

The other problem you might have is, if you have hammered the cam you might have damaged the oil pump at the other end when you hit it that way. That's why you should always put the oil pump on after the timing gears.

Hope this helps,
Ian

[jayh29]

Can you get a micro file on the thread to repair the damage? Obviously taking care not to get any filings anywhere they shouldn't.

 

 

You could possibly use a small file to correct the thread taking care not to get any metal filings in the engine, you could make up a cover to shield the engine and also use a magnet to help.

The other problem you might have is, if you have hammered the cam you might have damaged the oil pump at the other end when you hit it that way. That's why you should always put the oil pump on after the timing gears.

Hope this helps,
Ian

Thanks guys, I should be able to get a file on it, I saw on youtube a guy very slighty chamfered the end?

[sledgehammer]

a thread file may work - £xpensive , but usefull

 

http://www.ebay.co.u...d file&_sacat=0

Edited by sledgehammer, 29 January 2017 - 02:39 PM.

[jayh29]

a thread file may work - £xpensive , but usefull

 

http://www.ebay.co.u...d file&_sacat=0

Yeah I saw the snapon version on youtube...I've just tried a new file...no chance as its such hardened metal it wouldn't touch it, I'm not sure one of these would work either.

hmmmm maybe an engine out job.

Jay.

[sonikk4]

A decent set of needle files should be able to sort that out. It will take a while and you will need to be patient. I have rescued threads worse than that in the past.

[sledgehammer]

as above - just takes time

 

the thread files are very hard , but I suspect cheaper ones may be made of cheese

 

it is worth taking your time , it will work in the end

 

maybe order a new nut - just incase

[Stu.]

Try a junior hacksaw in the thread groove and work it back slowly over the dented areas to re cut. Go carefully and slowly.

 

Oh, and buy yourself a nylon / rubber hammer.

[jayh29]

Thanks all.

I have treated myself to a 1275... (can't wait)  so I will hopefully find it a bit easier with this engine on the bench, that way I can take my time. Thankfully it's the 76 engine so well worth doing even if I end up rebuilding it.

[gazza82]

Put a socket over the end of the camshaft and hit that next time .. but I'm surprised it needed a hammer/mallet to fit on anyway.

[jayh29]

Put a socket over the end of the camshaft and hit that next time .. but I'm surprised it needed a hammer/mallet to fit on anyway.

Wise words for next time

It seemed like the new chain was so tight that it must have put the cam sprocket at a slight angle so I had to tap both new sprockets into place...lesson learned.

[Stu.]

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