MB UR Quattro head rebuild.

Tun · 18-11-20, 01:17 PM

Following on from my road trip my car is back and it has been confirmed that the camshaft pulley bolt had come undone and the pulley had slipped the shaft. I carried out a compression test prior to commencing head removal which revealed cylinders 1&4 to be without compression. I removed the head with both manifolds an the turbo attached which significantly speeded the job up. Number 1 inlet and number exhaust valves had taken the hit but closer inspection of the piston crown revealed number 2 exhaust had also contacted. New valves and gasket set ordered updates to follow.

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eltee · 18-11-20, 01:40 PM

Shame this happened, looked like you were having a great trip,

Tun · 18-11-20, 02:14 PM

Quote:

Originally Posted by eltee

Shame this happened, looked like you were having a great trip,

Hi Pete, we were and did have a great trip! If I'm going to be honest it's already just another memory/funny story from our road trip and a valuable lesson learnt.

Duffy3074 · 18-11-20, 02:57 PM

Planning on just taking the marks off of the crowns or going deeper?

Tun · 18-11-20, 03:10 PM

Quote:

Originally Posted by Duffy3074

Planning on just taking the marks off of the crowns or going deeper?

I was just going to dress the high spots with a file, but, as ever, I'll listen to advice.

Duffy3074 · 18-11-20, 03:15 PM

That's what I'd do

It'll be fine methinks

John. · 18-11-20, 06:53 PM

Tidy looking engine bay even with the head off.

Good luck rebuilding

Isimmo · 18-11-20, 08:11 PM

It’s going to be fine, if you can strip it down and crack on that quick yourself, then I’m sure you’ll quickly work through the fix

tractor Dave · 18-11-20, 08:28 PM

Looks very similar to the one I did recently. Just check the valve guides are ok. A little wear is normal on these engines but excessive play will need addressing.
I was working on a 20v engine and had to replace all 10 intake valves!

Tun · 21-12-20, 10:45 AM

Back together and running!

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18-11-20, 01:40 PM	#2
eltee Grown up member Classic Audi Club Member Join Date: Jan 2009 Location: Falkirk Scotland Posts: 510	Shame this happened, looked like you were having a great trip, __________________ 88 100 cs sport

18-11-20, 08:11 PM	#8
Isimmo Super Moderator Classic Audi Club Member Join Date: Jul 2007 Location: Sissix-by-the-sea Posts: 15,218	It’s going to be fine, if you can strip it down and crack on that quick yourself, then I’m sure you’ll quickly work through the fix __________________ 1985 WR quattro, 1985 20vT RallyRep, 1993 MTM ABY S2 Avant. 2010 S3 Sportback.

21-12-20, 10:45 AM	#10
Tun Grown up member Classic Audi Club Member Join Date: May 2011 Location: Buxton Posts: 745	Back together and running! Sent from my iPhone using Tapatalk __________________ 1988 MB quattro 2012 S4 Avant

18-11-20, 02:57 PM	#4
Duffy3074 4 ring whore! Classic Audi Club Member Join Date: Aug 2015 Location: Dalgety Bay, Fife Posts: 2,145	Planning on just taking the marks off of the crowns or going deeper?

18-11-20, 03:15 PM	#6
Duffy3074 4 ring whore! Classic Audi Club Member Join Date: Aug 2015 Location: Dalgety Bay, Fife Posts: 2,145	That's what I'd do It'll be fine methinks

18-11-20, 06:53 PM	#7
John. 4 ring whore! Classic Audi Club Member Join Date: Mar 2011 Location: Scottish Borders. Posts: 7,529	Tidy looking engine bay even with the head off. Good luck rebuilding

18-11-20, 08:28 PM	#9
tractor Dave Senior Member Classic Audi Club Member Join Date: Apr 2018 Location: Wales Posts: 1,174	Looks very similar to the one I did recently. Just check the valve guides are ok. A little wear is normal on these engines but excessive play will need addressing. I was working on a 20v engine and had to replace all 10 intake valves!