 Engine failure on track day, need some help, T4 GB 2.0 head failure |
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| CheeRS |
 May 10 2019, 01:08 PM
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Member  Group: Members Posts: 93 Joined: 5-May 19 From: Paris France Member No.: 23,093 Region Association: France  |
Hi, here is my presentation post :
http://www.914world.com/bbs2/index.php?showtopic=337989 two weeks ago I was in Monthlery near Paris France, for a wagenfest with my 914. Get some troubles with the engine, a hammer noise and the engine stopped smoothly like out of gas. here is what I found : https://drive.google.com/open?id=1gzsWwNBOh...86Kbof2P4BCHHrm some pics |
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| r_towle |
May 12 2019, 08:27 AM
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#2
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Custom Member Group: Members Posts: 24,705 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States 
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no head seal (gasket) needed.
You can lap the cylinders to the heads to get a good seal. Without that Head Temp Sensor, its possible that you ran too lean. Thus, you dropped the valve. Good luck with the new rebuilt heads, they may work out, but using old head tends to be a gamble (one I do all the time) rich |
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| CheeRS |
May 12 2019, 04:51 PM
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#3
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Member Group: Members Posts: 93 Joined: 5-May 19 From: Paris France Member No.: 23,093 Region Association: France |
QUOTE(r_towle @ May 12 2019, 08:27 AM)  no head seal (gasket) needed. You can lap the cylinders to the heads to get a good seal. Without that Head Temp Sensor, its possible that you ran too lean. Thus, you dropped the valve. Good luck with the new rebuilt heads, they may work out, but using old head tends to be a gamble (one I do all the time) rich Bonsoir, what do you mean by lap the cylinder to the head ? (I'm French) (IMG:style_emoticons/default/beer3.gif) |
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Posts in this topic
CheeRS Engine failure on track day, need some help May 10 2019, 01:08 PM
CheeRS my own workshop, this is a Aircooled specialized s... May 10 2019, 01:20 PM CheeRS cylinder 3 admission valve stand in open position May 10 2019, 01:21 PM CheeRS Opening the engine and disassembling the djetronic... May 10 2019, 01:29 PM
914_teener
Opening the engine and disassembling the djetroni... May 10 2019, 01:33 PM CheeRS
Opening the engine and disassembling the djetron... May 10 2019, 02:07 PM 914_teener classic dropped valve seat.
Pull the heads and re... May 10 2019, 01:30 PM 914_teener Follow the ecu harness back from the ECU...you sho... May 10 2019, 02:30 PM CheeRS Thanks, to be sure I will track the wire and the n... May 10 2019, 02:55 PM GregAmy I'd be more worried about the dropped valve se... May 10 2019, 06:00 PM CheeRS
I'd be more worried about the dropped valve s... May 11 2019, 12:42 AM bandjoey For a guy with that shop, I don't think he wor... May 10 2019, 06:11 PM Chi-town Have the head checked for cracks before you waste ... May 10 2019, 07:02 PM Dave_Darling After you look at the heads, consider the LN serie... May 10 2019, 08:46 PM Superhawk996
After you look at the heads, consider the LN seri... May 11 2019, 08:22 PM CheeRS more May 11 2019, 12:43 AM Bleyseng If I were you I'd order a set of new castings ... May 11 2019, 08:43 AM CheeRS
If I were you I'd order a set of new castings... May 11 2019, 06:36 PM sithot
If I were you I'd order a set of new casting... May 12 2019, 02:24 PM rhodyguy Do you intend just to do the one head? May 11 2019, 08:56 AM CheeRS
Do you intend just to do the one head?
I will a... May 11 2019, 06:38 PM Bleyseng Buy a set of these with the coating to keep the he... May 11 2019, 09:57 AM CheeRS
Buy a set of these with the coating to keep the h... May 11 2019, 06:38 PM Bleyseng
Buy a set of these with the coating to keep the h... Jun 1 2019, 10:38 AM BeatNavy https://newsite.hamheads.com/home/
Contact Len Ho... May 11 2019, 06:47 PM Jetsetsurfshop :D
Good money spent. May 11 2019, 07:36 PM Dave_Darling Sorry, I meant LE series heads.
But they look to ... May 11 2019, 10:15 PM porschetub I would be rather worried about rebuilding those h... May 11 2019, 11:58 PM CheeRS I had a look on amc spain, 914 heads are not avail... May 12 2019, 02:21 AM Superhawk996
About head seals, on a french forum, I get the d... May 12 2019, 08:06 AM porschetub
no head seal (gasket) needed.
You can lap the cy... May 12 2019, 06:31 PM Mark Henry You can get new bare 914 2.0 cores from AA perform... May 12 2019, 12:13 PM Bleyseng
You can get new bare 914 2.0 cores from AA perfor... May 12 2019, 03:51 PM CheeRS tomorrow I dismount the second cylinder head and I... May 13 2019, 04:19 PM CheeRS the actual pistons are AA 93,95 May 14 2019, 05:34 AM CheeRS Bonsoir tout le monde, with your help, thinks are ... May 16 2019, 01:44 PM veltror Since you are in Europe, just across the water tal... May 16 2019, 04:38 PM CheeRS Hello, this week, heads will be shipped to the spe... May 18 2019, 02:37 PM CheeRS Was surprised to found this modification on my eng... May 18 2019, 02:39 PM CheeRS this screw is not original.
Why make this ?
Perhap... May 18 2019, 02:43 PM billh1963 I've seen a picture like that before... <_... May 18 2019, 03:14 PM CheeRS Hello,
Heads, pistons and cylinders are at the mac... May 28 2019, 09:53 AM CheeRS more May 28 2019, 09:54 AM CheeRS Is the block dead ? May 28 2019, 09:55 AM CheeRS last one May 28 2019, 09:56 AM CheeRS with nail we feel an angle so the block has moved May 28 2019, 09:57 AM Dave_Darling We would call those "cracks", not ... May 28 2019, 11:40 AM sixnotfour out side of case,,get a die kit,,,casting flaws ?? May 28 2019, 12:09 PM ChrisFoley I see casting lines, not cracks. May 28 2019, 06:37 PM Jetsetsurfshop
I see casting lines, not cracks.
Same. Casting... May 28 2019, 07:40 PM Dave_Darling Well, if Chris says they're not cracks, believ... May 28 2019, 08:53 PM sixnotfour I Pointed to a true solution ...not an opinion.. May 28 2019, 08:54 PM Bleyseng
I Pointed to a true solution ...not an opinion..
... May 28 2019, 09:09 PM McMark :agree:
Casting marks. Nothing more. May 29 2019, 01:12 PM CheeRS :DRUNK:
Thanks and CheeRS.
now two more question... May 31 2019, 02:30 PM Montreal914 I think someone on The Samba is rebuilding them. N... May 31 2019, 02:49 PM CheeRS You should consider a cylinder head temperature ga... Jun 1 2019, 12:20 AM Bleyseng http://www.dakotadigital.com/index.cfm/pag...prod/... Jun 1 2019, 07:54 AM Montreal914 I've been using this one:
http://thesensorcon... Jun 1 2019, 10:30 AM CheeRS hello, heads came back from the shop, new seat, he... Jul 5 2019, 03:19 PM CheeRS in the moment I started to go up but without doing... Jul 5 2019, 03:21 PM CheeRS Lastly, I wanted to install 911 elephant feet but ... Jul 5 2019, 03:24 PM Bleyseng You must grind off some of the rocker arm (while n... Jul 5 2019, 05:40 PM Jake Raby Wow, a dropped intake seat.. I thought all those t... Jul 5 2019, 05:53 PM CheeRS Thanks,
and what about cylinders 1 & 2 and 3 ... Jul 5 2019, 11:39 PM Bleyseng You can take a cylinder and using valve lapping co... Jul 6 2019, 09:42 AM CheeRS by cleaning very carefully all the surfaces and ch... Jul 8 2019, 02:56 PM Bleyseng In inches thats .0314 which is pretty tight deck a... Jul 8 2019, 03:23 PM CheeRS I saw some pics showing testing the gap with a cla... Jul 8 2019, 03:36 PM Bleyseng Yes but we are worried about the piston hittinh th... Jul 8 2019, 04:55 PM CheeRS logic, thanks, will add shin to get 0.04 Jul 8 2019, 11:10 PM CheeRS Engine returned today in the car.
A lot of parts c... Sep 9 2019, 02:06 PM CheeRS you can see it on this photo Sep 9 2019, 02:07 PM rhodyguy That oil temp wire should be mounted on a stud beh... Sep 10 2019, 07:50 AM sportlicherFahrer The oil temp wire plugs in to the main harness nea... Sep 10 2019, 09:14 AM |
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