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TDI 101 Got a simple/basic TDI question? Are you a newbie (new to the forums). Feel free to post your question here.

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Old October 8th, 2019, 04:24   #16
barrymurphy
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What damage do you suspect will be done to the head?

Sorry if the question shows a level of ignorance..

I should also say that the engine was still full of oil.

It seems what burned was oil that was blown in from the intercooler and when that was gone she stopped.

Last edited by barrymurphy; October 8th, 2019 at 04:40. Reason: more relevant information
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Old October 8th, 2019, 04:57   #17
Tdijarhead
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Bent valves, spider cracked lifters. Again you won’t know if you even had collision until you pull the head and see the marks left by the valves on the piston heads, and fully inspect the lifters for cracks or domes.

As far as the compression at 300 or so goes I suppose it is possible your tester could be faulty. It certainly wouldn’t be the first one to give a low reading.
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Old October 8th, 2019, 05:02   #18
barrymurphy
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Ok, so not damage to the physical head itself like warpage etc?
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Old October 8th, 2019, 05:14   #19
Tdijarhead
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Probably not but as long as the head is off you should check. You’ll shoot yourself if you put it all back together and something like that crops up later.

I’m assuming you’re in England, here in the states we would normally get a completely redone head from Franko6, you may want to check with Frans in the Netherlands.

His contact info should be in this link. He could probably get you a head or even an entire engine if you need it.

http://forums.tdiclub.com/showthread...ighlight=Frans
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Old October 8th, 2019, 10:36   #20
BobnOH
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As for why it did it, the previous owner disconnected the turbo, likely cause it's done it before and they needed to keep driving it (to sell?). I'd say nothing for it but a complete evaluation of, top and bottom.
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Old October 9th, 2019, 01:24   #21
barrymurphy
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I assume as I cannot get the engine to TDC manually and I am pulling the cam and head, there is no point in worrying about timing for now apart from pinning the IP sprocket?
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Old October 9th, 2019, 05:01   #22
Tdijarhead
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Quote:
Originally Posted by barrymurphy View Post
I assume as I cannot get the engine to TDC manually and I am pulling the cam and head, there is no point in worrying about timing for now apart from pinning the IP sprocket?

Correct.
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Old October 9th, 2019, 06:29   #23
barrymurphy
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Appreciate the excellent assistance. Sometimes its a quick pointer here or there that makes all the difference.

I have the cam cover off so I will see if I can see anything obvious on the lifters.

I will now proceed to pin the IP, remove the TB, remove manifold, turbo and then the head.
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Old October 9th, 2019, 15:48   #24
barrymurphy
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I checked the lifters,(cam still on),and they look perfect. I will give them a closer look when the cam is removed but on seeing nothing wrong i ventured underneath.

The oil pan has been off a few days and most oil has dripped off the engine.

I can turn the crank manually maybe one to one and a half full turns either way and doing this backwards and forwards i was able to look at the rods.

Number 2 is bent, number three looks like it is also and four might be as well. (Four looks straight but I am looking side on from an awkward angle). I cannot see number one with the oil pick up in the way.

So head will be coming off anyway and will check valves.
Is there a possibility the valves got away with it? seems unlikely?
Anything I need to be aware of when removing oil pick up and is there a particular process for this?

Is there a process for rod replacement on an alh?
My engine is an asv and I believe the only difference between the two is that the asv pistons are different in that they have oil channels.
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Old October 9th, 2019, 19:12   #25
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If the engine stayed in time (I'd check just to know) the valves should be ok.
I suppose they could get bent if there was enough oil drawn in during the runaway.
You can see if they hit the pistons when you get the head off.
In the US I would send my unbent rods to Franko6 to match up with correct ones.
Hopefully you have a similar specialist available in the UK.
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Old October 10th, 2019, 00:10   #26
barrymurphy
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anything in particular I need to be aware of when removing the oil pick up?

no once only bolts etc etc
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Old October 10th, 2019, 07:56   #27
barrymurphy
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I have been offered an ALH engine that is of no use to someone for 50!

I assume rods and valves will fit in an ASV engine? but the pistons will not transfer?

Also any guides on removing and reinstalling the oil chain and tensioner?
Reading about disasters if tensioners break or not installed properly.

Last edited by barrymurphy; October 10th, 2019 at 09:58. Reason: more relevant info
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Old October 10th, 2019, 11:48   #28
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Quote:
Originally Posted by barrymurphy View Post
I have been offered an ALH engine that is of no use to someone for 50!
I assume rods and valves will fit in an ASV engine? but the pistons will not transfer?
Also any guides on removing and reinstalling the oil chain and tensioner?
Reading about disasters if tensioners break or not installed properly.
I would try to use the complete ALH if it is still together and a runner.
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Old October 10th, 2019, 12:41   #29
barrymurphy
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Is the block and head on an asv the same size as an alh, with the same fittings? I think they might be. The second hand engine will have been stripped for some parts but block and head are intact. I have no guarantees with its state only a scrap yards word for it. And i do not know the reason the car ended up in the scrapyard, it could have had its own runaway!

i wont really know till i open it up.

And I know the compression on my asv was excellent pre runaway so would trust it more. provided pistons and rings have not been damaged, should I not transfer rods?

thanks

Last edited by barrymurphy; October 10th, 2019 at 12:42. Reason: missing info
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Old October 19th, 2019, 11:39   #30
barrymurphy
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See head from alh and the asv that had the runaway. Firstly the asv lifters, approx 4 of them not working. No surface damage but the spring inside is dead. So I assume valves working at speed killed them? The asv head has two valves that looks like heat discolouration.? Pistons look ok? Pulling rods in a while.



Sorry, how do I post pictures,?
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