just purchased cougar 2.5l 24v in black

G

grahamecougar

Forum user
Jul 6, 2011
15
0
Haddington
Hi there, just bought my cougar w-reg. purchased with a overheating fault. water pump belt had snapped causing can to overheat.
changed water pump and fitted new therostat,and replaced the radiator.put new drive belts on.
now the car will not fire up. when turning over you could smell petrol,and if i put the accelarator fuly down there is a popping noise (air). can anyone help with any ideas.
 
Hi there grahamecougar and welcome to ukcougar.com. Unfortunately I know nothing about what makes the big cat tick - I just love driving them :devilish:

Hopefully someone a bit more knowledgeable will be a long in a bit with some sound advice - they're good at that :LOL:
 
Welcome grahamecougar. :)

This could be very bad news. Unfortunately the V6 doesn't like overheating. An overheat can cause head gasket failure.
This is why everyone is asking if it was running ok before you replaced any parts.

Are there any signs of oil in the coolant and is there any mayonnaise type substance under the oil filler cap?
 
Doesn't the V6 often go between combustion and atmosphere so it isn't detectable with the usual coolant/oil checks or sniffer checks?
 
FlamencoAssassin said:
Welcome grahamecougar. :)

This could be very bad news. Unfortunately the V6 doesn't like overheating. An overheat can cause head gasket failure.
This is why everyone is asking if it was running ok before you replaced any parts.

Are there any signs of oil in the coolant and is there any mayonnaise type substance under the oil filler cap?
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That was where i was going but was trying not to scare the poor bloke when it maybe that he's just disturbed something fitting the rad / pump / thermostat.

If it was me I'd plugs out one by one to see if they are we with water but also check all the connection e.g. maff, cam sensor etc
 
Hello and welcome aboard Graham. Your issues don't sound good matey - I'd take the advice from those above. Best of luck.
 
no it was a non runner.

had been used daily till it overheated. no oil in water, no water in oil, i

is changing the head gaskets a d.i.y job for an amateur mechanic. is it a big job, or would it be quicker to fit a secondhand engine
 
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As far as I know, the problem lies not with the difficulty of changing the head gaskets but with the fact that 9 out of 10 times a V6 block that overheats will warp, making the replacement of the gaskets pointless. If you do require a replacement lump though, they're not stupid money these days. £300-£400 or maybe even less should secure you an engine in acceptable nick.
 
A decent second hand engine is the easiest and cheapest option.
I think changing the head gaskets is an engine-out job anyway. And I think the heads will need skimming flat before reassembly.
 
Firstly check all the sensors are connected (hopefully its something simple like this) - if no results then take the plugs out one at a time to look for any suggestions of water
 
Start with the basics.

Are you getting fuel? I guess so due to smell
Are you getting sparks?
Are you getting compression?

Perhaps hook up a diagnostics reader to check for stored faults?
 
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