1.9 head on a 1.6 mech. block

[saurkraut]

Just scored a new 1.9 IDI head.  I intend to put in on my 1.6 mech. block.

Anyone have a good solution for the extra oil return/coolant passage issue?

Also, as long as its brand new, I think I'll do the ceramic coating in the prechambers, head, and exhaust ports.  Any body had this done befor. and who did it?

Its going to be a winter project while my '79 hibernates.

[RabbitJockey]

just plug the extra hole and then it's basically a bolt on.  the aftermarket heads are designed to fit both mechanical and hydro engines, although it is a mechanical one, it has like a dummy extra oil drain with no hole in it.  just plug the oil drain then the head is basically bolt on just like a normal solid lifter head,

[RabbitJockey]

also, how does the 1.5td run compared to the 1.6td

[saurkraut]

The head is a NOS 1.9 head.

The extra oil drain hole is open.  i also want to run the metal HG.  I supose i'll go with BSP threaded plugs unles someone has a better suggestion.

just looking for someone that has done it successfully.

The 1.5 is still in work, its my winter rabbit.  just a month or so behind schedule.  Still collecting the turbo plumbing.  Manifolds and turbo are on.;  Airbox, turbodrain and what IP to use are the remaing issues.

[Audi80]

For metal HG, you will have to block the second return hole from gasket also. I used 2mm rubber for it.

[RabbitJockey]

run the 1.5 pump, unless you want an lda, but the 1.5 pump will give me revs than a 1.6 pump, should help give it more ass, they are supposedly a little better.

[saurkraut]

Yup, going to use a 1.5 pump.  I'd like to put the LDA top on the 1.5 pump, but I haven't gotten around to putting the two pumps side by side and see if it possible to swap the tops.

i emailed Giles but haven't heard back yet.  I guess he is really busy now.  If the tops aren't intercangeable, maybe some of the guts are intercangeable.

Probably have to do a rebuild as every used pump I've put on other diesels has leaked eventually.

I'm really interested to see the results.  I even saved a crank and rods from a 1.5 to put in my 1.6 if things work out.

[935racer]

Maybe I am missing something but you can't mount a hydro head on a mechanical block, what is going to give the lifters pressure?

[burn_your_money]

Maybe I am missing something but you can't mount a hydro head on a mechanical block, what is going to give the lifters pressure?

Yeah now that you mention it I seem to recall reading that you can use a mech head on a hydro block but not vise-versa

[935racer]

I know you can't, unless these reman heads come with mechanical cam followers, which I highly doubt they do, than its just like a factory head. Hydro heads only go on hydro blocks, Mechanical heads will fit on either.

[RabbitJockey]

he doesn't have aftermarket... but the aftermarket one i have will go on either.  i've read here several times that you can put a hydro head on a mechanical block but blocking the drain hole

[935racer]

he doesn't have aftermarket... but the aftermarket one i have will go on either.  i've read here several times that you can put a hydro head on a mechanical block but blocking the drain hole

How do the lifters get oil pressure and how does it drain back into the block?

[saurkraut]

Its a NOS bare head, guides only. I was planning on running solid lifters. Will they fit in the Hydro head?

[RabbitJockey]

just so you know i am not arguing in any way or anything, but the drain holes are the same right. theres 3 of them 2 in the back and 1 in the front, then a hydro head has an extra one in the front, thats the one you plug right.  and wouldn't they just get oil through the normal passages?

[saurkraut]

A lot of stuff flying around here.

Finish this statement:

"It is IMPOSSIBLE to put a hydro head on a mechanical block because....."