 914 2.0 cooling question, Any potential downside to this proposed modification? |
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| parrish911 |
 May 18 2013, 04:14 PM
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Newbie  Group: Members Posts: 35 Joined: 27-April 06 Member No.: 5,939 Region Association: South East States  |
I have a '73 2.0 that is primarily used for auto-x with occasional weekend drives. I live in Tampa, FL. There is a copper bellows type thermostat that is used to control a flapper valve that routes cooling air. The bellows expands with heat and gradually opens the flapper valve, directing more air to the cylinders.
My question, is there any downside to bypassing the bellows and leaving the flapper valve in the always open position? I don't really deal with 'cold' weather and I am not convinced there is any benefit to having this on the engine, given how I am using the car. I would welcome your thoughts on this. Thanks, Steve |
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| ChrisFoley |
Jun 19 2013, 04:55 AM
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I am Tangerine Racing Group: Members Posts: 8,030 Joined: 29-January 03 From: Bolton, CT Member No.: 209 Region Association: None 
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What you describe during engine warmup is not unusual for a d-jet injectd engine.
It has nothing to do with the thermostat or the cooling flaps. Also the pushrod tube seal leak and your oil temp gauge reading have nothing to do with the thermostat working or not. The engine pulses because the auxilary regulator has closed,, reducing the idle rpm, but the engine still isn't warm enough to run efficiently with the amount of fuel being injected. |
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| Alapone |
Jun 19 2013, 07:35 AM
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Member Group: Members Posts: 110 Joined: 4-April 13 From: Nj Member No.: 15,734 Region Association: None |
QUOTE(Racer Chris @ Jun 19 2013, 06:55 AM)  What you describe during engine warmup is not unusual for a d-jet injectd engine. It has nothing to do with the thermostat or the cooling flaps. Also the pushrod tube seal leak and your oil temp gauge reading have nothing to do with the thermostat working or not. The engine pulses because the auxilary regulator has closed,, reducing the idle rpm, but the engine still isn't warm enough to run efficiently with the amount of fuel being injected. Hey RacerChris thanks for the help here. Do you think my start up pulsing is something to worry about correcting or just deal with the slight inconvenience? Can I do any damage to the engine with this cold start issue? Do you think what i have described on temp is too hot to run the engine? I aspire to own a set of your headers one day and thanks. |
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Posts in this topic
parrish911 914 2.0 cooling question May 18 2013, 04:14 PM
bandjoey I don't think it matters in hot weather. I ke... May 18 2013, 04:23 PM parrish911 Thanks Bill. I was thinking the same thing. Plu... May 18 2013, 05:54 PM nathansnathan Without the thermostat, the engine will take a lon... May 19 2013, 02:05 AM
SirAndy Without the thermostat, the engine will take a lon... May 19 2013, 11:54 AM Rand
But what do you think is the downside of running ... May 19 2013, 12:03 PM Bleyseng Leave it in as it speeds warmup as VW/Porsche had ... May 19 2013, 07:50 AM Drums66 .....Modus Operandi! :idea:
:wavebye: May 19 2013, 11:48 AM Rand Yes, as said, it means slower warmup. Would you re... May 19 2013, 11:51 AM parrish911 Wow, thanks for all the responses. I will try to... May 19 2013, 03:19 PM Dave_Darling The thermostat is present in all 914-4 engines as ... May 19 2013, 04:16 PM Cap'n Krusty The failure mode of the thermostat would be in the... May 19 2013, 04:40 PM ww914
The failure mode of the thermostat would be in th... May 20 2013, 05:17 PM Elliot Cannon My thermostat/bellows have been removed since the ... May 19 2013, 05:07 PM mrholland2 My engine installing mechanic installed the flaps ... May 19 2013, 07:43 PM SirAndy The concern wasn't the thermostat as much as i... May 20 2013, 12:11 AM bandjoey My daily drive is 30 miles each way. I don't h... May 19 2013, 10:13 PM Dave_Darling Oh yes, they can get stuck closed! Trust me o... May 20 2013, 04:29 PM SirAndy Oh yes, they can get stuck closed! Trust me o... May 20 2013, 05:01 PM Dave_Darling
Have you seen the spring on that thing?
One woul... May 20 2013, 08:51 PM ww914
Have you seen the spring on that thing?
One wou... May 20 2013, 09:23 PM SirAndy Just convince me I am wrong.
You are wrong! T... May 20 2013, 09:29 PM ww914
Just convince me I am wrong.
You are wrong! ... May 20 2013, 11:08 PM SirAndy [quote name='SirAndy' post='1867067' date='May 20 ... May 20 2013, 11:24 PM ww914 Well, crow isn't so bad. Thanks Andy for findi... May 21 2013, 07:57 AM stugray I am putting the shrouds on my race engine.
I had ... May 26 2013, 01:12 PM Rand
I am putting the shrouds on my race engine.
I had... May 26 2013, 07:36 PM Drums66
After reading this I guess that on an engine wi... May 26 2013, 07:54 PM SirAndy After reading this I guess that on an engine with ... May 26 2013, 09:55 PM Alapone Sorry I have nothing to add on the topic just more... Jun 18 2013, 11:05 AM nathansnathan
Sorry I have nothing to add on the topic just mor... Jun 18 2013, 11:49 AM Alapone Nathan, thanks for the response. Maybe i am wrong ... Jun 18 2013, 01:42 PM Racer Chris
Hey RacerChris thanks for the help here. Do you t... Jun 19 2013, 08:03 AM |
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