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2 problems need diagnosis; egr and missing coolant?
Topic Started: Jan 27 2013, 08:04 PM (650 Views)
nixmixin
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I have been chasing a couple engine grimlins since the moment I got this car but lately I have 2 new issues.

The first one is the code 51 (EGR). I have replaced the EGR valve with a brand new one, cleaned out all the lines and head passage from the exhaust manifold to the valve as well as the passages to the intake manifold. I have also replaced all the vacuum lines. I did the process for rebuilding the IAC valve as instructed in this link http://geometroforum.com/topic/5019858/1/ . The car runs great, idles fine. I mainly drive on the freeways and I have a heavy foot and still stay in the low to mid 40 mpg range.

The 2nd odd new issue is that I am "missing" coolant. I recently had to swap out my crank shaft (long story) and ever since then, I keep having to add water/coolant to the radiator pretty regularly (once a week). There are no visible leaks any where. No dripping or steam or even the smell of coolant when I drive. The performance of the car is great so I dont think it is a head gasket issue. No "smoke" from the exhaust either that would lead me to think head gasket. Was thinking maybe a bad radiator cap?

Any thoughts would be greatly appreciated.

thank guys
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Coche Blanco
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Troll Certified

Is the rubber under your rad cap supple, or brittle?
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patrickbruce
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average teenage gearhead

Coche Blanco
Jan 27 2013, 10:25 PM
Is the rubber under your rad cap supple, or brittle?
:gp

also, check the seal at the thermostat.
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MinnesotaMike
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patrickbruce
Jan 28 2013, 12:05 AM
also, check the seal at the thermostat.
:gp

This post may be helpful. Do it right!
http://geometroforum.com/topic/5015643/1/
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nixmixin
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Thanks guys, i will just install a new cap and thermostat tomorrow
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nixmixin
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Still dunno what the deal is with the EGR. The check engine light has remained off since I last reset the codes.

Found the issue with the missing coolant though. There is a leak under the dash, either a bad hose or bad heater core. Gunna dig into that this week.
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Woodie
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Sorry to tell you, the hoses end under the hood.
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nixmixin
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Woodie
Feb 5 2013, 06:30 AM
Sorry to tell you, the hoses end under the hood.
If I was normal, you would be right. But.... when I rebuilt the car, I pushed the ends of the hoses into the holes of the fire wall before tightening the hose clamp. So, It is either a bad clamp that would normally leak into the engine compartment or the heater core is cracked. :(
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nixmixin
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I did replace the thermostat and radiator car though, just to eliminate those possibilities.
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