[urq] RE : Bottom end rebuilt

[Geraint Lloyd]

I think that Louis-Alain might have caught my paranoia about oil pumps.
The typical failure mode of the 4 cyl pumps was for carbon gunge to jam the
relief valve and for the cogs to wear groves into the base plate
The 4 cyl pump is a vastly different design with smaller cogs so I guess
that they work harder and wear faster.

The 4cyl relief valve is also not a serviceable part and the pumps are dirt
cheap.

That said, a set of big end shells and an oil pump will generally restore
weak oil pressure in a 4 cyl VW engine if anyone ever goes that way 

Geraint


-----Original Message-----
From: urq-bounces at audifans.com [mailto:urq-bounces at audifans.com] On Behalf
Of Brandon Rogers
Sent: 15 April 2008 12:03
To: 'Louis-Alain Richard'; 'Jim Haseltine'; 'Urq'
Subject: Re: [urq] RE : Bottom end rebuilt

I would think used should be fine - I don't recall ever hearing about one
going bad....

Brandon

-----Original Message-----
From: urq-bounces at audifans.com [mailto:urq-bounces at audifans.com] On Behalf
Of Louis-Alain Richard
Sent: Tuesday, April 15, 2008 9:51 AM
To: 'Jim Haseltine'; 'Urq'
Subject: [urq] RE : Bottom end rebuilt


Hi Jim,

I have opened the pump and it looks nice enough that I'll take the risk and
reinstall it. With new bearings, the oil pressure should be good.

Anyone knows a vendor for this oil pump 034 115 105A (superseded to 105B)?

BTW, a new OEM oil pump is a 432$ affair on this side of the pound... 034EFI
sells one for 300$.

Louis-Alain

 
> 
>3- Is the oil pump a device that usually need replacement, as on the 
>'murican engines ? Is it replaceable in situ with the engine in the car 
>if I discover later that I should have replaced it now ?


I replace them if the engine has done more than 150K miles. Remove the back
plate - if it's scored then replace the pump. You _can_ replace the pump
with the engine in the car but it's not easy - I'd change it now.
 
Regards,
 
Jim Haseltine

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