Block test booked to check for HG failure

Vinny73 · Feb 4, 2009

So so so... this one I've been on here posting about, well, it's booked in for a Block Test to give an idea of the HG integrity.
It will show if there is ANY oil/water contamination and give me a picture of the state of the HG.
They said no point in doing a Hydrocarbon / emmissions test as it's just passed its MOT and would have been highlighted if it was a problem then, 2 weeks ago...

Thoughts?

mysteryman · Feb 4, 2009

Shouldn't u have both tests done? HG might have gone y'day?

Vinny73 · Feb 4, 2009

The garage said the HC test wont point to HG failure!? They said thats just for emmissions... They'll do it no prob tho, but whats the point?

gavbriggs · Feb 4, 2009

they talking ****e, if there are hydrocarbons in the coolant then there is a leak between coolant and combustion chambers, i.e a gap between hg and block, possibly pointing to HG failure and slipped liner!! its a 2 minute chemical test! an emissions test will also show coolant in the exhaust gasses but a reading could be off for other reasons!

if exhaust gasses are in the coolant you would expect some pressurisation of the coolant system though this may not be obvious untill the car has done a few miles whereas any H/C dissolved in the coolant will be picked up by the chemical test!

just my opinion but as i have said, yr spending 4.5k so a few quid is well worth the extra peace of mind.

Vinny73 · Feb 4, 2009

So I need to see if they can do the HC test then for sure...

Vinny73 · Feb 4, 2009

And if its just a chemical test, is it not something that can be done by ourselves? Im guessing you place some chemical in the coolant tank and look for the result??

andy 0352 · Feb 4, 2009

saw a hydrocarbon kit on fleabay the otherday for about £30,might be just as cheap to try it yourself,it,s only a case of pouring an amount of coloured liquid into a sniffer typr tube,and put it into the top of the expansion tank if it changes colour theres a problem if it don,t it probably ok

mysteryman · Feb 4, 2009

Vinny - yes for sure. Pouring strawberry syup in the coolant etc Bull!
Just get the emmissions checked n come back n talk to the guys on here that do actually know wot they r talking about (not including myself in that category byw).

gavbriggs · Feb 5, 2009

mysteryman said:
Vinny - yes for sure. Pouring strawberry syup in the coolant etc Bull!
Just get the emmissions checked n come back n talk to the guys on here that do actually know wot they r talking about (not including myself in that category byw).

with a chemical test the results are usually clear enough for anyone to see! and it only prove hc in coolant!

fanatic · Feb 5, 2009

have stripped many a 3.9 for hg, liquid tests are crap, we tested by running up with coolant header cap off gas analyzer probe in engine bay for background HC, if it jumps when held over header tank it's hg

Vinny73 · Feb 6, 2009

fanatic said:
have stripped many a 3.9 for hg, liquid tests are crap, we tested by running up with coolant header cap off gas analyzer probe in engine bay for background HC, if it jumps when held over header tank it's hg

As Im understanding that, thats just the emmisions probe in the engine bay, with the coolent cap off? Correct? to see if it picks up emmisions suggesting a HG failure/leak...??

Block test booked to check for HG failure

Vinny73

Active Member

mysteryman

New Member

Vinny73

Active Member

gavbriggs

Well-Known Member

Vinny73

Active Member

Vinny73

Active Member

andy 0352

New Member

mysteryman

New Member

gavbriggs

Well-Known Member

fanatic

RESPECT IS EARNED, BEATINGS ARE FREE ;-)

Vinny73

Active Member

Similar threads