IPB

Welcome Guest ( Log In | Register )

> What is the right engine temperature for an AR 145/146?, Does nominal engine temperature varies by model version?
Jacob
post 21st April 2018 00:16
Post #1 | Print


1.3 8v
*

Group: New Member
Posts: 12
Joined: 20th April 2018
Local Time: 16th October 2019 10:07
From: Athens
Member No.: 13,437
Driving: Alfa Romeo 145 1.4 16V T.S
From: Greece



Hi,

I am an owner since 1999 of an Alfa Romeo 145 Junior edition 16V 1.4 T.S (AR 33503) model year 1998 Gama version (930).

All this years engine temperature despite driving and weather conditions was always just a click below 90C, right in the middle of the temperature instrument.
Unfortunately in 2016 and without any previous visible signs, engine got overheated. Most probably because of poor engine gasket seal maintenance (it should have been replaced in the long term routine maintenance).
Engine repair cost required was higher then replacing it with a used one. And so it happened. Engine changed with used same type which was in pretty good condition. All other motor peripherals were maintained from the first one except few that had to be replaced with new ones. Some with original parts and others with after market parts (such as sparks, thermostat, water pump, temperature sender, MAF, Cam belt, etc...). Only the radiator was substituted with a used one, original part number, thoroughly cleaned and maintained.

However, from the first few rides it was obvious that unfortunately the car did not resemble to its previous condition. Poor performance, many technical issues and of course, temperature issues arise.

The mechanic responsible for the refit, on the one hand, claimed that most likely the engine was an earlier version than the original thus working on slightly higher temperature levels, and on the other, that the oil that passed through in the water system during the overheating, was preventing the coolant system to operate optimally and that after some time the system would clean it self gradually returning to its standards. Back then it sounded somehow a logical explanation and just rested upon it... big mistake. Just 10 moths later this engine got also overheated with out even a warning light blink!

This time went of course to a different mechanic, just to someone, not a fancy specialized guy but an "old guard" brought up from the good old days. Thankfully the engine this time didn't suffer from serious irreversible damage so it went for a repair. Most of the motor peripherals were also replaced for the second time. During the repairs, it came out that we also had to replace the intake manifold which we did. So, and having in mind to improve somehow performance, without any fitting problems, installed a manifold from a 2.0 liter AR 156 TS!

This time finally, the result of the repairs and the refit was on its whole ...magnificent! The 19 year old car reminded its brand new days, not to mention that in some aspects it even performed better!

But one thing persisted. Temperature issue was once again present! Just that this time it seems to be somehow better regulated. It fluctuates around 90C reaching up to 100-110C in traffic and goes as low as 80C in open highways. All cooling system parts checked thoroughly twice this time and most of them replaced with new ones. But problem still persisted.

Just a few days ago the temperature metering instrument malfunctioned. So i got another one. A used one, as new ones are not anymore available. Installed it and was terrified to see that the temperature problem was even worse than i thought. What was going on? ... i knew that the new instrument i got was from an AR 146 TS 2000 model, the MY version. Just to notice that the two reading instruments looked in first sight the same but actually weren't. The original had 90C in the middle between 50C lower and 130 higher, while the other had 80C in the middle between 40C in the low end and 120C in the top end!
However readings corresponded actually to the same values in both instruments. It's just what looked like nominal in the original one around 90C, in the other looked as if it was way above the middle nominal temperature area. When temperature rise up to 100C in the first one, in the other seemed to be very high, almost overheated! ...puzzling blink.gif !

So does that mean that different engines from different production years, models and versions have different spectrum of working temperatures? And beyond that, is matching the right parts to the actual corresponding version a bit more complex than it seems? For example i have noticed that there are two diversions of thermostats. Some of theme start to circulate when reaching 88C while others do that quite lower in 82C! Both diversions, even after checking parts with VIN number, are supported for all TS engines! And that is even more puzzling...

So now what, anybody any ideas? Thanx!

This post has been edited by Jacob: 21st April 2018 00:30
Go to the top of the page
View Vehicles
+Quote Post

Posts in this topic
Jacob   What is the right engine temperature for an AR 145/146?   21st April 2018 00:16
alfizta   old versions of TS engines (metal top) work at aro...   22nd April 2018 13:46
Jacob   old versions of TS engines (metal top) work at aro...   23rd April 2018 15:09
dante giacosa   iF that is the case, Jacob; That you now have a m...   24th April 2018 06:51
Jacob   iF that is the case, Jacob; That you now have a m...   24th April 2018 16:14
omar   Hello, how are you? I am from Argentina. I have a ...   24th April 2018 14:29
alfizta   well, this is somewhat embarrassing, as service ma...   25th April 2018 10:16
dante giacosa   my CF2 1.8 TS runs at an indicated "90" ...   25th April 2018 10:21
alfizta   well, hope this helps V1, part no. 60614140, only ...   25th April 2018 11:43
dante giacosa   Well done, Alfizta!   25th April 2018 12:00
alfizta   but I have a remark/correction to make to myself. ...   25th April 2018 12:12
alfizta   about your question about the engine being «cooked...   25th April 2018 12:20
dante giacosa   the engine in those pictures looks PRETTY clean ...   25th April 2018 12:37
alfizta   about temp readings on your new dashboard, 1.4 and...   25th April 2018 13:05
Jacob   dante giacosa and alfizta, wow... thank you for yo...   25th April 2018 19:40
dante giacosa   this is a fascinating problem I'm not sure CF...   25th April 2018 21:24
Jacob   this is a fascinating problem I'm not sure CF...   25th April 2018 21:41
Jacob   this is a fascinating problem I'm not sure CF...   27th April 2018 12:12
Antonio   Hmm...I think the problem is simpler than how you ...   25th April 2018 22:07
Jacob   Hmm...I think the problem is simpler than how you ...   25th April 2018 23:05
alfizta   Your thermostat should open at 83șC (both versions...   27th April 2018 18:42
Jacob   After the valuable info got here and processing al...   28th April 2018 00:56
dante giacosa   Crikey Jacob, This is getting pretty technical. ...   29th April 2018 20:38
Jacob   Crikey Jacob, This is getting pretty technical. ...   1st May 2018 09:26
dante giacosa   okay- sounds like a plan are you sure that you ha...   1st May 2018 11:45
Jacob   okay- sounds like a plan are you sure that you ha...   1st May 2018 19:15
Ganz   I agree with Antonio. My ph1 or cf1 alway hangs at...   3rd May 2018 21:03
Jacob   I agree with Antonio. My ph1 or cf1 alway hangs at...   3rd May 2018 23:22
dante giacosa   i think the radiator coiled sensor is a PH1 featur...   4th May 2018 16:49


Reply to this topicStart new topic

 



- Lo-Fi Version Time is now: 16 Oct 2019 07:07