dan.taylor.1
General Tinkererer
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- 2,689
- Location
- Kendal, Cumbria
The earlier ones had a fuel heater on the right hand side of the head which was prone to failure.
I (and garage #1) couldn't find any of these.The earlier ones had a fuel heater on the right hand side of the head which was prone to failure.
But this is diesel, and we could not find any heatexchangers.Mercs, at least the M271 engine (I'm sure there are others), uses an oil cooler which passes heat to the the engine coolant. They fail, and you end up with oil in the tank. I speak from experience.
The sort of 1994-2006 ones. My mate has one. On the right side of the head is a coolant heater for the fuel, it comes from the tank to the heater, then to the filter then to the pump.I (and garage #1) couldn't find any of these.
It is fuelfiter>pump>fuelrail>injectors, as far as I can see.
What do you mean by earlier ones, 250 series?
Will check this again, thanks.The sort of 1994-2006 ones. My mate has one. On the right side of the head is a coolant heater for the fuel, it comes from the tank to the heater, then to the filter then to the pump.
We were trying to sort starting issues and wondering where all these extra fuel lines went and then found them bypassed as it was leaking!
That has been seriously considered and rated as less likely, since first time was on the way back from Italy.have you ****** someone off? if i wanted to get back at someone and give them a proper poser, i might drain some coolant and add diesel...
Head gasket problem ?????? Needs checking out doing a wet & dry compression & leakage test , for that's the first place to look when oil or fuel is in the coolant ,I was thinking the same as Julian has pictured. Not uncommon.
Whats the injection system in the head? Could a diesel passage leak into a coolant pathway if its cracked?
Yes, I saw that later - definitely separate, but the pump does seem to have an o-ring seal between its nose and the housing, so potentially a trap for a leak. (Understand what you're saying about the weep hole, and I'd also expect one, but don't know for a fact that there is one.)There is a gap between the fuel pump and water pump, and the fuel pump
Thank you for your post.Just a thought (grasping at straws on your behalf ):
I believe the high pressure diesel pump bolts through the water pump housing on these. From what I can tell from photos of replacement parts, it looks like the pump mounting flange and the waterpump gasket share a machined surface.
Brief glimpse at 29:06 here:
Could there be a weep from the pump that is ending up trapped against this face somehow, eventually building up enough pressure to force its way past the waterpump gasket and into the coolant? A crack in the water pump housing that is letting a leak through? Any sign of a diesel or coolant weep where the high pressure pump bolts on?
Anyway, just my 2p.
Even better; diesel is added to the coolant so it is created from nothing.What a strange story! Perhaps you have invented something to save the World. A van that turns water into diesel