factory sealent on heads 2.1 DJ

Post by **manxman** » 27 Sep 2007, 18:02

Just curious if the yellow sealent you can see on this head is the sealent they used at the factory? I know the sealent you use now is a black rubber like substance, and a yellow sealent going on the head bolts.

[img:640:480]http://img526.imageshack.us/img526/6750 ... 051fw5.jpg[/img][/url]

Post by **toomanytoys** » 27 Sep 2007, 18:43

probably.. seens yellow on a couple of engines...
is that the 1.9 or your 2.1?
Hows it going? reg ok?

Post by **manxman** » 27 Sep 2007, 20:17

2.1, from the 16". The head is back on now but I was debating weather to redo the other one while I had the motor out if the sealent was the wrong stuff, but if its the origonal sealent I'll leave well alone rather than risk snapping a head bolt. Guess I should have looked at the 1.9

the motor has 55k miles on it, there's no ridge on the bores, and the honing marks are still there so that seems about right to me.
I read somewere that the water pump should be replaced at about that mileage, its not leaking what would you recommend?

anything else that I should do while its on the bench? (new clutch fitted and stainless exhaust to go on)

not been up to test centre yet, due to holidays, busy on house, and spending to much time in the pub!

Post by **toomanytoys** » 27 Sep 2007, 20:24

well if the head stud is gonna break when undoing it might go in a few thou in anycase... but your choice.
Waterpum... can fail anytime... might go for ages.. but 27 quid, its prob worth doing as is a new Tstat.. worth checking all the coolant pipes and flushing the oil cooler (water side)

Oh, only preload the tappets from just touching, 1/4 to 1/2 turn..

Post by **manxman** » 27 Sep 2007, 20:30

ok I'll think about the other head, put a new pump on, flush the cooler, and was going to replace a couple of the steel pipes.

here is a pic of the exhaust (JP exhausts)

[img:800:600]http://img252.imageshack.us/img252/9747 ... 062ff5.jpg[/img]

Post by **T'Onion** » 28 Sep 2007, 07:02

Nice looking exhaust

I would do the other side while the engine is out.
Then you know both sides are good.And you wont have to pull it again if a seal or ring goes .

Chances are a 2.1 wont snap a stud , tends to be early 1.9 's , but your could start a trend

,

Post by **manxman** » 28 Sep 2007, 07:33

ok ,ok your starting to convince me!

but if it all goes horribly wrong I'll blame you!

waterpump and thermostat on order.

good job I haven't got any thing better to spend my wages on, like an unfinished house for example!

Website · Post by **syncrosimon** » 28 Sep 2007, 07:38

I wonder what that exhaust is gonna sound like, hopefully as good as it looks. The VW ones always look a bit scruffy from behind, and the tail pipes are made from those tin cans you find in the ashes of a bonfire.

Post by **T'Onion** » 28 Sep 2007, 07:56

£400 + vat sound a good price for one too

http://www.jpexhausts.co.uk/Site/Commercial.htm

baring in mind how much a gsf or jk one cost and they aren't SS

Post by **toomanytoys** » 28 Sep 2007, 08:59

A couple of members have them.. sounds stock... Aidan has one on his..
and I think Syncroandy has too..
I'll let them comment on the quality...

Post by **wasserleaker** » 29 Sep 2007, 18:59

the thin yellow coating on head mating surfaces might be some sort of factory anti corrosion coating, as im sure ive seen a picture somewhere of a new unfitted head with a yellowish coating on the sealing face, mine had traces of it on too when i rebuilt it, as you say the vw sealant you get now is black for the water jacket gasket. ther was no yellow stuff on the old rubber seal i took off which makes me think its a coating on the head, not a sealant, could be totally wrong tho!

Post by **manxman** » 30 Sep 2007, 08:06

wasserleaker wrote:the thin yellow coating on head mating surfaces might be some sort of factory anti corrosion coating, as im sure ive seen a picture somewhere of a new unfitted head with a yellowish coating on the sealing face, mine had traces of it on too when i rebuilt it, as you say the vw sealant you get now is black for the water jacket gasket. ther was no yellow stuff on the old rubber seal i took off which makes me think its a coating on the head, not a sealant, could be totally wrong tho!

agreed, had a look at the 1.9 wasserboxer I have laying about and you can see the yellow stuff on there, it must be sprayed on at the factory.

If it is ment to be an anti corrosion coating it doesn't work as when I was cleaning it off my heads with 400 grit wet and dry (as per bently manual) there was signs of slight corrosion under areas were the coating was like new.

There no trace of the black sealent either on the old rubber seal or the head so it must be an upgrade from vw.

Post by **wasserleaker** » 01 Oct 2007, 19:50

mine were well pitted in places around the sealing face, but cleaned, wire brushed, de greased, wet n dryed, degreased again! and no leaks since rebuild after using the vw sealant after over 6000 miles now