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Old 21st January 2022, 20:12   #11
bl52krz
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Hi Simon. The poster has got a 1.8 not a 2.5v6.
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Old 21st January 2022, 20:54   #12
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Originally Posted by bl52krz View Post
Hi Simon. The poster has got a 1.8 not a 2.5v6.
I took that to refer to temperatures not engine type, however, would there be any interest in the procedure I used to replace the thermostat? I did some searching through the forums, but could not find anything specific to 1.8 thermostat replacement.
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Old 22nd January 2022, 08:32   #13
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Originally Posted by bl52krz View Post
Hi Simon. The poster has got a 1.8 not a 2.5v6.
Yes, thanks Dave, hence my reference to 104˚ not 100˚ in my last post.
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Originally Posted by Kaloz View Post
... could not find anything specific to 1.8 thermostat replacement.
I haven't come across anything either Nigel. There's plenty about the PRT of course but you don't have one of those on your 1.8.

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Old 22nd January 2022, 10:45   #14
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Here's a pic of the housing at the back of the block
https://rimmerbros.com/Item--i-PEM10025LP
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Old 22nd January 2022, 16:19   #15
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I have just replaced my thermostat - - my engine heats up quickly and runs at 93-96c, depending on speed, with 99 showing when idling in slow moving or stopped traffic. Are these temperatures ok?
There's nothing inherently wrong with them. The normal running temperature will depend on the rating of the stat you fitted. The default stat for this engine is nominally '88°C', but all 1.8/1.8T's run somewhat warmer than that. Stats also have a production tolerance which means the 'specs' are approximate. I dare say there are also several suitable varients, 88°C and 82°C being typical.
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Top and bottom hoses were replaced. Interestingly, the bottom hose has a plastic joint to separate the two halves of that hose - not one unit like the original (from Rimmer Bros) so it would not be to difficult to fit a PRT thermostat.
Intriguing. So it has a simple short plastic joiner? Where did you buy it?

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Did consider this but couldn’t work out the plumbing arrangements.
Swapping to a PRT system was popular not so long ago and there were hose kits available, which included the PRT. Here's one for the 1.8 turbo: https://www.ebay.co.uk/itm/164990851...EAAOSww31dwLf-Haven't searched for the non-turbo version, but it's a relatively simple job. The vital thing is to remove the original one from th upper housing. This avoids the DTJ problem (Double Thermostat Jeopardy) For more on that: https://cse.google.com/cse?cx=013872...e&q=DTJ&oq=DTJ


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Old 22nd January 2022, 19:28   #16
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Smile 1.8 running temperatures

Quote:
Originally Posted by T-Cut View Post
There's nothing inherently wrong with them. The normal running temperature will depend on the rating of the stat you fitted. The default stat for this engine is nominally '88°C', but all 1.8/1.8T's run somewhat warmer than that. Stats also have a production tolerance which means the 'specs' are approximate. I dare say there are also several suitable varients, 88°C and 82°C being typical.
Intriguing. So it has a simple short plastic joiner? Where did you buy it?

Swapping to a PRT system was popular not so long ago and there were hose kits available, which included the PRT. Here's one for the 1.8 turbo: https://www.ebay.co.uk/itm/164990851...EAAOSww31dwLf-Haven't searched for the non-turbo version, but it's a relatively simple job. The vital thing is to remove the original one from th upper housing. This avoids the DTJ problem (Double Thermostat Jeopardy) For more on that: https://cse.google.com/cse?cx=013872...e&q=DTJ&oq=DTJ


TC
By writing in that manner I have given a wrong impression.
The new hose was purchased from Rimmer Bros, with a short plastic joiner at the bottom (P clip end) with a small diameter hose leading back up to the header tank. Did not take it apart to check, but it did look like a PRT.
Placed my old heat shield onto the new hose; the press clips were broken/came apart,; it now has fencing ties to hold it in place
If considered relevant, I will record my method of thermostat change on the 1.8.
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Old 22nd January 2022, 19:31   #17
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Originally Posted by Kaloz View Post
By writing in that manner I have given a wrong impression.
The new hose was purchased from Rimmer Bros, with a short plastic joiner at the bottom (P clip end) with a small diameter hose leading back up to the header tank. Did not take it apart to check, but it did look like a PRT.
Placed my old heat shield onto the new hose; the press clips were broken/came apart,; it now has fencing ties to hold it in place
If considered relevant, I will record my method of thermostat change on the 1.8.
Edit- it did NOT look like a PRT
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Old 22nd January 2022, 20:35   #18
FLYING BANANA
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My 1.8t has a PRT fitted and runs steady at 87 degrees, on long down hill sections it drops to 81, and up a steep hill will rise to 89. In stationary traffic it rises to 92.
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Old 23rd January 2022, 09:14   #19
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Originally Posted by FLYING BANANA View Post
My 1.8t has a PRT fitted and runs steady at 87 degrees, on long down hill sections it drops to 81, and up a steep hill will rise to 89. In stationary traffic it rises to 92.
That is interesting, and raises thoughts on fitting a PRT. As I have said, the plumbing arrangements would need to be carefully worked out beforehand.
Just added up the cost- £284.70 including VAT, if all hoses and T pieces were purchased. £85.20 of that is for one single hose. The total is almost the cost of a stainless steel exhaust, which I’d rather have. I may consider a change to an 82c thermostat instead.
But first I will have the fan speeds checked out instead of risking overheating by trying to get them to cut in myself. If they are okay and cut in at about 104c, then I shall accept that this engine runs at 93c.
Later this week I begin to dismantle and re-build a Standard Diesel engine-a different ball game altogether.
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Old 23rd January 2022, 09:38   #20
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Quote:
Originally Posted by FLYING BANANA View Post
My 1.8t has a PRT fitted and runs steady at 87 degrees, on long down hill sections it drops to 81, and up a steep hill will rise to 89. In stationary traffic it rises to 92.
That is interesting, and raises thoughts on fitting a PRT. As I have said, the plumbing arrangements would need to be carefully worked out beforehand.
Just added up the cost- £284.70 including VAT, if all hoses and T pieces were purchased. £85.20 of that is for one single hose. The total is almost the cost of a stainless steel exhaust, which I’d rather have. I may consider a change to an 82c thermostat instead.
But first I will have the fan speeds checked out instead of risking overheating by trying to get them to cut in myself. If they are okay and cut in at about 104c, then I shall accept that this engine runs at 93c.
Later this week I begin to dismantle and re-build a Standard Diesel engine-a different ball game altogether.
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