K

Karls

Active Member

• Jul 16, 2015

• #1

Recently removed the head, head gasket in good nick but some of the valves were a bit tight to remove from the guides - had to be tapped out with a punch and mallet. Most of the valve stem oil seals were knackered and some of the valves were majorly coked up.

What's caused the valves to be this tight in the guides? Is it the lack of stem oil seals?

 

Dippypud

Never Knowingly Understood

Full Member

• Jul 16, 2015

• #2

Did you find any valve caps ?

 

K

Karls

Active Member

• Jul 16, 2015

• #3

Some had valve caps, some had remains of valve caps...the rest of the caps were in the sump.

 

Dippypud

Never Knowingly Understood

Full Member

• Jul 16, 2015

• #4

Karls said:

Some had valve caps, some had remains of valve caps...the rest of the caps were in the sump.

Click to expand...

Could be some had scored the stems on their journey to Pluto .....

 

K

Karls

Active Member

• Jul 16, 2015

• #5

Dippypud said:

Could be some had scored the stems on their journey to Pluto .....

Click to expand...

Yeah maybe. Is that an issue for future use?

 

Turboman

Mab An Gov

• Jul 16, 2015

• #6

Karls said:

Yeah maybe. Is that an issue for future use?

Click to expand...

I think you can ream out the guides in situ in the head. Not done it on Tdi, but was common on older diesels.

 

C

crowmann

Active Member

• Jul 16, 2015

• #7

I found the same on my head - two valves needed gently drifting out and the level of coke around the inlet ports was off the scale and this on an engine with water injection albeit only for the past 10,000 miles out of 134,000.

Truly did not expect the state of the head when I got to inspect it.

All went back together well though after a full decoke, skim and three days in a power bath!