hi all
need some advice on water temp with a x flow it's a 1600 with bike carbs . my problem is regarding the water temp as it seams to be running
hot . the rad is from a vw polo and have a header tank fitted .to be honest I am not convinced that I have plumbed in the items right ie top hose to
top of rad and bottom hose from pump to bottom of rad . header tank big outlet t to bottom hose .there is a small outlet from rad to which I have put
that to the small one on the header tank . fan is electric and comes on at 85c but takes a long time to off . I haven't been out on the road yet
as I don't want to run if not right . its cost me a bit of money to get sorted . if anybody has any photos of x flow plumbing or there is
something I have not right any help would be grate thanks regards ian
X flow engines have a heater connection coming off of the inlet manifold which goes through the heater and returns to the engine at the screw in elbow at the water pump. The outlet is at the highest point of the cooling system and allows coolant to flow before the thermostat opens thus bleeding any air from the system . Do you have a heater or bypass hose? If it's blocked off that may be your problem? When I converted to TBs I installed a bleed point in the heater hose that allows me to bleed air from the system easily , just used a pluming fitting.
85 is quite a low temp for an electric fan to come on IMO.
90 is the normal running temp on the majority of engines (bikes are higher) I would say coming on should be circa 95?
What type of electric fan are you using? And is it wired up to spin in the correct direction? Should blow through the rad if fitted to the front, or
pull through if fitted on the engine side of the rad.
The reason I ask the make as the cheap £20 quid ones on eBay wouldn’t blow the skin off a rice pudding. I use a comex which easily moves double the
amount of air compared to an eBay special for the same size of fan
hi
thanks for replies
the fan is a 12inch from cbs and fitted to front of rad . and there is no heater fitted to the car so blanked of
and header tank as high up as far as I can get it as not to foul the front end (flip front end)the car is a stylus . ran fine with bike engine in
.just not sure of how it as to be plumbed in without heater fitted .regards ian
The cbs 12 “ fan has an output of 780cfm... the Comex equivalent is 1300 cfm.
quote:
Originally posted by ianminki
hi
thanks for replies
.just not sure of how it as to be plumbed in without heater fitted .regards ian
.just not sure of how it as to be plumbed in without heater fitted .regards ian
hi steve
yes have just got a new thermostat . one problem I have found is I had fan turning in the wrong way , only difference I can make out is the small hose
from rad to a header tank and the 13mm hose to a t on the bottom hose to rad as the inlet manifold is blocked (on outlet on manifold)I am running
bike cabs . I will be looking at timing as well to make sure I have that right . thanks for your reply
regards ian
I had the same system as the O/P except that I didn't use the small outlet at the top of the radiator, i.e. blanked it off, and instead ran a small tube from the housing above the thermostat to the small inlet on the tank. The thinking being that that housing was the highest part of the system apart from the tank itself, so it self bled.