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  #1  
Old July 7th, 2014, 11:36 AM
richord
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Richard Ordowich
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Dirty Air filter

I changed my air filter and have driven only about 200 miles on the road and the new filter is already dirty. It has started to turn black. There was a bit of oil in the base of the air cleaner canister. There is a hole in the cannister that I beleive used to have some valve which is no longer there so the oil drips out on its own.

Should the air filter get dirty that fast?

The engine is a 2.5 TD.
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  #2  
Old July 7th, 2014, 11:37 AM
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thomas
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When is the last time you serviced the intercooler and turbo? You don't want oil getting past the turbo seals and then going into the intercooler/ intake.
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Old July 7th, 2014, 11:47 AM
tpond
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The TD is notorious for excess crankcase pressure pushing oil out the breather, and into the air filer. You could reroute the breather pipe into a catch tank as a short term fix.
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Old July 7th, 2014, 12:03 PM
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Mybluett
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Toby is correct here, the engine is likely worn and if you do a compression check there is probably one or two cylinders with very poor compression. For a temporary fix (very temporary) do as suggested and pull the breather line from the air intake fitting - route to a bottle/catch container and watch your oil level. I'd suggest dealing with the rings/pistons as soon as possible or consider a motor swap in your very near future (either upgrade to a TDI or downgrade to an NA 2.5)
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Old July 7th, 2014, 12:11 PM
richord
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Richard Ordowich
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Thanks. I will try a catch can to see what appears. I was considering doing a compression check and I guess this is now warranted. Any suggestions for a compression gauge to buy?

I don't think I want to spend $$ on a replacement engine since this is a "toy" vehicle.

Is it possible to change the rings and pistons without pulling out the engine? I've never done this in a car but have done this work on motorcycles.
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Old July 7th, 2014, 12:19 PM
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Mybluett
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Quote:
Originally Posted by richord View Post
Thanks. I will try a catch can to see what appears. I was considering doing a compression check and I guess this is now warranted. Any suggestions for a compression gauge to buy?

I don't think I want to spend $$ on a replacement engine since this is a "toy" vehicle.

Is it possible to change the rings and pistons without pulling out the engine? I've never done this in a car but have done this work on motorcycles.
Any diesel compression gauge will work (higher compression than a petrol engine)

Assuming the bore is still round on the affected cylinders, you can change rings in place. The challenge comes when they are out of round and you need to open it up to take the next sized piston. Easier and cheaper to take the block to a machine shop…

Plan on spending just under 1K to do rings, bearings, and the top end seal kit.

OR try to find a take off 2.5NA from an MOD import that is being upgraded to a Tdi…
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Old July 7th, 2014, 03:18 PM
richord
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Richard Ordowich
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Any suggestions for a good compression gauge? I went on Amazon and most of the reviews on diesel versions are poor.

Any suggestions or pointers to references for changing pistons and rings? Can I do this without pulling out the engine?
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Old July 7th, 2014, 03:48 PM
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pickup the compression set from Harbor Freight -

the diesel rebuild manual for the 300tdi will walk you through the steps and the shop service manual will have all the specifics.

In-car you will need a helper and will be working above and below the engine. Sump off, oil feed out of the way, unbolt the lower conrod-retainer remove bottom bearing, push piston up (above help guiding/lifting) and out. Inspect & measure for round and dims.

IF WORKABLE - hone bore, fit new rings, fit new upper crankshaft bearing, use ring compressor & insert piston back into cylinder, fit bottom bearing & reattach to the crankshaft. Repeat three more times as needed.

A short term solution at best.
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