You can change the style the forum displays by selecting your preferred style at the bottom left of the site.
We have made an enhancement so that old threads should now link from search results to the correct thread. This is not yet in place for single post links
I find a brass drift through the cam lightening holes works well or wedge a brass drift under a cam lobe into the head.
An impact gum works wonders here too. May not even have to hold the cam in place.
Be sure not to set the head down with the valves down while the cams are in!!!
I have my head off right now so I am followingthis thread carefully!
Dave K.
USA
1991 e//S2 (home built S2 - the only way to get one in USA!)
2001 S4
Any news Doug? that combustion chamber really looks like something has gone through it at some point, but as you said it, it really looks like it has happened a while ago. Another surprise: the combustion chambers are damn clean, I bet most of the fuel we've sprayed through them was completely burnt, thus no deposits
BTW, how does the turbine look like after the treatment? Nothing went through it I hope!
Cheers,
Mihnea, back to cooking again
'98 Silver Grey 2.7T S4, dual 2.75" turbo back exhaust with no cats, FMIC, BIG injectors, 10 Bar motorsport fuel pump, modded RS4 turbos, tubular exhaust manifolds, custom intakes, RS4 MAF, Bilstein PSS9, H&R ARBs, 19" BBS CH, custom remap, 511 BHP/505ft-lbs
Originally posted by desmo888 Which head gasket are you going to use?
year/model please, I need to order one here in the states.
034 103 383AD
That is the part no - which should be the metal laminated one. Best to ask for an RS2 head gasket. Some S2s had the paper one and if it is "off the shelf" in the states it could be a paper one.
Originally posted by Mihnea Any news Doug? that combustion chamber really looks like something has gone through it at some point, but as you said it, it really looks like it has happened a while ago. Another surprise: the combustion chambers are damn clean, I bet most of the fuel we've sprayed through them was completely burnt, thus no deposits
No news yet - the head is off and stripped down - well the valves are still in it. I will be taking it along to a head specialst to see what the say and if they convince me they know what they are talking about I will get them to do the work on it.
Is it common for heads that are damaged like that, to get welded and ground down to fill in the parts that are damaged?
BTW, how does the turbine look like after the treatment? Nothing went through it I hope!
[/B]
I think it was OK - I'll have a closer look tomorrow.
I got my head completely stripped and I am wire brushing the valves and springs.
The head is soaking and I will start on cleaning that today. I will also be cleaning up the passages a bit with sanding drums on my die grinder.
Good stuff!
A friend with a local Audi repair shop offered me the pistons at his cost of $1300 USD for the set. I might go that direction instead of the J&E pistons, not sure yet. I'll post some pictures later.
Dave K.
USA
1991 e//S2 (home built S2 - the only way to get one in USA!)
2001 S4
Is it common for heads that are damaged like that, to get welded and ground down to fill in the parts that are damaged?
we did a lot of welding and skimming back and crack repairing but looking at your photos i wouldent have thought it would require welding just dresing up. If your head place is just a reconditioners not a tuning shop they probably wont have flowing equipment and wont be interested in doing it at all they are happier repacing guides seats and skiming which is enough for most. It wont make that much differance but it would be nice to have it right while you have the opertunity.
see what sort of machine they use to skim we used a belt linisher for alloy and surface grinder for cast some only use surface grinders for both.
Its much easier to remmove as little as possible with a linisher. Its always best to have alloy heads skimmed when removed as the new gasket will seal better.
Hope this helps not confuses
A linisher is an endless belt of sandpaper on a flat table, like a small conveyor belt. Very easy to get things not flat at all as flatness depends on pressure and the state of the abrasive belt.
A linisher is a big flat bed belt sander. You set the head face down on a moving sanding belt and it removes metal. benifit is you do not need to set the head up in a jig under a grinding wheel.
mutch quiker and easier.
A linisher is an endless belt of sandpaper on a flat table, like a small conveyor belt. Very easy to get things not flat at all as flatness depends on pressure and the state of the abrasive belt.
They could not put a timesert in due to not enough room or known space down the spark plug thread. So a helicoil will be put in that one chamber. They also said they have seen damaged chambers knocking out spark plugs before - Since that chamber is already damaged, it was probably that, that weakend the thread.
They were not keen on reworking the damaged chamber, although they will check the valves are stting properly
They are reprofiling the inlets, but thought the roughness was OK.
They also said that they would usually reprofile the valve guides to an aerodynamic shape when they are in the head, as long as they aren't shortened or weakened doing this.
It will be a couple of weeks before I get it back though.
Milled finish is much better, due to the accurate way in which it is done. Yes it is down to operaters skill, but a mill is a far better option.
I have known many a head to be welded up and reworked to a high standard. This normally needs doing if a car has been run with little coolant or infrequent coolant changes, as it loses its anti-corrosion properties. Also if something like a valve head had come off and got smacked around in there, but there would be scaring on the piston crown.
HTH Dougal
sigpic
Tom C - www.rcmr.co.uk
Audi UR Quattro
Audi 100 C3 2.0 5 cyl 115ps
Audi S2 - 07k engine project aiming for 800ps
Audi B5 RS4 645ps 911nm
We process personal data about users of our site, through the use of cookies and other technologies, to deliver our services, personalize advertising, and to analyze site activity. We may share certain information about our users with our advertising and analytics partners. For additional details, refer to our Privacy Policy.
By clicking "I AGREE" below, you agree to our Privacy Policy and our personal data processing and cookie practices as described therein. You also acknowledge that this forum may be hosted outside your country and you consent to the collection, storage, and processing of your data in the country where this forum is hosted.
Comment