moody1
regular
Reged: 10/12/2005
Posts: 145
|
|
Just opened HWMBO workshop manual for 4 series Perkins and it says :
Indirect cooled engine - Thermostat opens at 69C, fully open at 87C
Direct cooled engine - Thermostat opens at 52C, fully open at 66C
(Page 27 of Manual)
Page 88 of ame manual indicates that your system is a later one with pressure relief system to allow water to bypass closed thermostat. The engine is designed to run at approx. 60C to prevent build up of salt deposits in head and cooling channels. Older engines on direct cooling had a manual valve you could adjust to control temp.
Indirect or Heat Exchanger cooled engines are designed to operate at higher temps of 65 - 93C.
It would appear then that you may have a higher rated thermostat than Perkins reccomend.
|
VicS
regular
Reged: 13/07/2002
Posts: 8369
Loc: Home: Kent. Boat: Chichester
|
|
Quote:
Just opened HWMBO workshop manual for 4 series Perkins
It would be jolly useful to get scanned copy of that on-line somewhere. On Bluemoment perhaps alongside or instead of the existing one.
--------------------
Old Chemists never die, they just fail to react
|
Pete735
regular
Reged: 13/11/2004
Posts: 68
Loc: South Wales
|
|
Ok, thanks Moody1. I thought 74 degrees was low!! I bought the thermostat from ASAP supplies, so first port of call will be them - bet I know what the answer will be though. Only problem I find with Perkins info is that you have to go to local agent who then contacts Sabre ( I think it is) who then contacts Perkins and lethargy takes over in my experience. At the temperatures you quote I may as well remove thermostat all together.
Any chance of a scanned copy of the manual you have?
I'll try and remove pressure relief valve - despite temperature I noted on gauge (which may not be particularly accurate) this relief valve did not open. As I do refrigeration work, measuring temperatures accurately is not a problem.
Thanks everyone for the comments.
|
lescargot
regular
Reged: 16/05/2001
Posts: 5029
Loc: Isle of Wight
|
|
Quote:
Quote:
Just opened HWMBO workshop manual for 4 series Perkins
It would be jolly useful to get scanned copy of that on-line somewhere. On Bluemoment perhaps alongside or instead of the existing one.
There is one here http://www.motoren.ath.cx/menus/perkins.html - the second one which is 54.2mb (the first one is in Dutch).
--------------------
Warning - Internet forums may contain nuts
|
VicS
regular
Reged: 13/07/2002
Posts: 8369
Loc: Home: Kent. Boat: Chichester
|
|
Quote:
There is one here
Looks like the same one as on Bluemoment.
Moody1 seems to have one that relates to the marine engine.
--------------------
Old Chemists never die, they just fail to react
|
stooza
regular
Reged: 03/09/2007
Posts: 13
|
|
how can a piece of metal become addicted ?
|
Pete735
regular
Reged: 13/11/2004
Posts: 68
Loc: South Wales
|
|
I was given an explanation recently that sounded plausible - from someone who repairs diesels for a living. The ether (I think it is) in easystart removes the oil on the cylinder walls, obviously in minute quantities, and over time there is excessive (compared to "normal" useage) bore wear. The compression decreases and there is poor starting as a result so more easystart is used, till it will only start on easystart.
Others may have a better explanation.
|
Previous
Index
Next
Threaded
[Re: 
Edit
Reply
Quote
