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| Rick_Eberle |
 Mar 17 2005, 02:21 AM
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#1
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Member  Group: Members Posts: 390 Joined: 14-January 04 From: Geelong, Australia Member No.: 1,558  |
So I did a valve adjustment a while ago, after starting the engine and hearing it pop and splutter on the intake side, and on the last valve (of course it was the last one!), I found the valve was stuck open.
I dropped the engine and pulled the head on Sunday, and here is what I found: Attached image(s) 
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Replies(1 - 19)
| Rick_Eberle |
Mar 17 2005, 02:28 AM
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#2
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Member Group: Members Posts: 390 Joined: 14-January 04 From: Geelong, Australia Member No.: 1,558 |
Down the port...
Attached image(s) 
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| Rick_Eberle |
Mar 17 2005, 02:31 AM
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#3
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Member Group: Members Posts: 390 Joined: 14-January 04 From: Geelong, Australia Member No.: 1,558 |
The combustion chamber...
Attached image(s) 
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| redshift |
Mar 17 2005, 02:38 AM
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#4
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Bless the Hell out of you! Group: Members Posts: 10,926 Joined: 29-June 03 Member No.: 869 |
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| Rick_Eberle |
Mar 17 2005, 02:40 AM
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#5
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Member Group: Members Posts: 390 Joined: 14-January 04 From: Geelong, Australia Member No.: 1,558 |
And the port damage...
Now here's the problem! The 914 didn't com to Australia, and apparently the T-4 bus was only a 1.7 for about 6 months, so replacements are rare, and expensive (like $600 for USED!) I'm planning a big four rebuild down the track, say two years away, so I want to save my pennies for that, but I also want to get my car running and registered by August, for the tenth anniversary of owning the car. The search continues... Attached image(s) 
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| McMark |
Mar 17 2005, 02:43 AM
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#6
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914 Freak! Group: Retired Admin Posts: 20,179 Joined: 13-March 03 From: Grand Rapids, MI Member No.: 419 Region Association: None |
Ouch. BTDT. At least the valve didn't break off.
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| type47 |
Mar 17 2005, 05:54 AM
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#7
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Viermeister Group: Members Posts: 4,254 Joined: 7-August 03 From: Vienna, VA Member No.: 994 Region Association: MidAtlantic Region |
Ahhh, my eyes.... my eyes.... (in my best Phoebe voice) (IMG:http://www.914world.com/bbs2/html/emoticons/sad.gif)
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| Joe Ricard |
Mar 17 2005, 06:53 AM
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#8
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CUMONIWANNARACEU Group: Members Posts: 6,811 Joined: 5-January 03 From: Gautier, MS Member No.: 92 |
So are you needing a head? I can hook you up. Just Pm me and we can come to some low price. Shipping could suck
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| skline |
Mar 17 2005, 07:01 AM
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#9
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Born to Drive Group: Members Posts: 7,910 Joined: 26-December 02 From: Costa Mesa, CA Member No.: 17 Region Association: Southern California |
That head can be fixed. I have seen Rimco fix much worse than that. Steve has a new machinist that can do it too. I would send it off to be fixed.
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| Joe Ricard |
Mar 17 2005, 07:08 AM
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#10
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CUMONIWANNARACEU Group: Members Posts: 6,811 Joined: 5-January 03 From: Gautier, MS Member No.: 92 |
Send them both. if you got one head hot enough to drop a seat then the other may not be to far behind. Then you can get bigger valves to go with your bigger engine plans. 1.7 heads are sturdy enough I have a set of 48 x38 heads that I gots plans for the next lump.
Oh yea get your head temp gauge installed where you can see it better. (IMG:http://www.914world.com/bbs2/html/emoticons/rolleyes.gif) |
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| Eric Taylor |
Mar 17 2005, 11:20 AM
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#11
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Senior Member Group: Members Posts: 909 Joined: 1-June 03 From: Newport, OR/Eugene Oregon- UO Member No.: 770 |
Man you should feel lucky, Droped vavle seat could have easily done more than head damage! (IMG:http://www.914world.com/bbs2/html/emoticons/ohmy.gif)
Eric |
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| rhodyguy |
Mar 17 2005, 11:32 AM
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#12
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Chimp Sanctuary NW. Check it out. Group: Members Posts: 22,082 Joined: 2-March 03 From: Orion's Bell. The BELL! Member No.: 378 Region Association: Galt's Gulch |
a member stateside should be able to hook you up with a set of heads 1.7 or 1.8 heads on the "cheap". have your choise (stateside) of machinest do the refresh, and have them sent down under as "used" items. put a bow on the package and maybe you can slide through customs and duty as a "gift" from an old 914 friend in the states. look into Ham or steve's guy.
kevin |
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| Dave_Darling |
Mar 17 2005, 12:13 PM
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#13
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914 Idiot Group: Members Posts: 14,990 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California 
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Any half-moon shaped "kiss" marks on the top of the piston? I have two pistons with those marks, myself....
Why is it always the intake seats? --DD |
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| McMark |
Mar 17 2005, 12:27 PM
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#14
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914 Freak! Group: Retired Admin Posts: 20,179 Joined: 13-March 03 From: Grand Rapids, MI Member No.: 419 Region Association: None |
Because the relatively cold intake charge cools the very hot seat enough to contract it and make it small enough in its bore to start dropping out. (IMG:http://www.914world.com/bbs2/html/emoticons/tongue.gif)
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| bd1308 |
Mar 17 2005, 12:29 PM
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#15
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Sir Post-a-lot Group: Members Posts: 8,020 Joined: 24-January 05 From: Louisville,KY Member No.: 3,501 |
so how does one prevent this from happening...
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| Jake Raby |
Mar 17 2005, 12:47 PM
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#16
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Engine Surgeon Group: Members Posts: 9,394 Joined: 31-August 03 From: Lost Member No.: 1,095 Region Association: South East States |
Don't get the heads hot.... Thats what creates this..
Even the crappiest valve seat install won't fall out if the heads don't get over 400F.. If you don't want this to happen again- Call me. A correctly installed seat of the right metallurgy won't drop out at 575F... |
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| bd1308 |
Mar 17 2005, 12:49 PM
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#17
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Sir Post-a-lot Group: Members Posts: 8,020 Joined: 24-January 05 From: Louisville,KY Member No.: 3,501 |
so just stay away from the red zone on the temp guage? Seems easy enough.
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| Joe Ricard |
Mar 17 2005, 12:53 PM
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#18
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CUMONIWANNARACEU Group: Members Posts: 6,811 Joined: 5-January 03 From: Gautier, MS Member No.: 92 |
Get a head temp gauge use it as a speed limiter. IF IT IS GETTING SLOW DOWN!!!!
My offer for cheap heads still stands. |
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| Jake Raby |
Mar 17 2005, 01:23 PM
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#19
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Engine Surgeon Group: Members Posts: 9,394 Joined: 31-August 03 From: Lost Member No.: 1,095 Region Association: South East States |
Ummn,
The "Red Zone" is OIL TEMP! Its TOTALLY unrelated the HEAD TEMP.... You can easily have baked heads with cool oil. Porsche and VW BOTH need their asses kicked for not monitoring head temps in these cars from the factory.... Head temps are load related directly and heavily impacted by tuning. Running around in 5th gear at 2800RPM will keep your oil cool as a cucumber and fry your heads due to increased load and lack of cooling fan pressure. Buy a CHT gauge. Oil temp is slow to respond to changes, hardly impacted by tuning and a poor observation method of looking at the entire engine. Head temps are severely impacted by low speeds and lugging... If the heads get too hot drop a gear and wind the engine up and WATCH them drop 100 degrees in 30 seconds. |
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| bd1308 |
Mar 17 2005, 01:26 PM
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#20
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Sir Post-a-lot Group: Members Posts: 8,020 Joined: 24-January 05 From: Louisville,KY Member No.: 3,501 |
well how would i mount a CHT sending unit in my car, and obviously I'd need one on each side |
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