Technical tempra SW 2.0L DOHC timing belt broken.

[tempra1995]

Well it finally happened....timing belt snapped.
Need to find out if the 159A6.046 engine Tempra 1995 2.0L engine is a interference or non interference engine. Can not find a definitive answer anywhere. I've a nasty feeling it's a interference engine. If so I'll scrap it after 25 years of great motoring. Installing a new cam belt (if now available) seems to me rather tricky what with removing cam cover(extremely tight for room) and not knowing where the various timing markings are for this engine.

 

[jackwhoo]

Well it finally happened....timing belt snapped.
Need to find out if the 159A6.046 engine Tempra 1995 2.0L engine is a interference or non interference engine. Can not find a definitive answer anywhere. I've a nasty feeling it's a interference engine. If so I'll scrap it after 25 years of great motoring. Installing a new cam belt (if now available) seems to me rather tricky what with removing cam cover(extremely tight for room) and not knowing where the various timing markings are for this engine.

If it is the 8v twin cam(Lampredi design) it may be a safe engine.
If it's 16 valve it is not safe .
Post a picture

 

[jackwhoo]

https://www.mirafiori.com/model/tbelt/

I can't think of auxiliary shaft referred too in the above but I believe it is a similar engine to yours , yours may not have the aux shaft referred to.

 

[jackwhoo]

Actually not a bad engine to do a belt on.

Special note crank pulley bolt is REVERSE threaded!

 

[varesecrazy]

https://www.mirafiori.com/model/tbelt/

I can't think of auxiliary shaft referred too in the above but I believe it is a similar engine to yours , yours may not have the aux shaft referred to.

Counter.rotating balance shaft I suspect

 

[jackwhoo]

Counter.rotating balance shaft I suspect

Hi Charlie,

I looked a little further after my reply.

The auxiliary shaft drove the semi vertical distributor shaft + oil pump and has an eccentric lobe-possibly for mechanical fuel pump.

I'm guessing that when the distributor moved to the end of a cam shaft(transverse applications) that the oil pump drive moved to crank nose. Auxiliary shaft deleted.

It could indeed Have counter rotating vibration reduction shafts, these don't foul the crankshaft.

Heck of a good engine.

Best wishes

Jack

 

[jonti]

Can the engine turn over on the starter? If not then they've probably collided.

if it's non-interference I would have thought you could turn the camshaft with a socket independent of the crankshaft.

If you can get the head off, repair is a possibility, with no external material damage could be limited to bent valves.

 

[jonti]

Actually not a bad engine to do a belt on.

Special note crank pulley bolt is REVERSE threaded!

Same as the TD. I remember attacking it with a breaker bar anti clock-wise and breaking the nut clean off.

 

[tempra1995]

OK.....first thanks to you all with great information.(crank pulley bolt)

1)It's an 8 valve version engine
2)It does have a counter balancing belt/shafts.(ePER states I have them)
3)It does turn over very easily without fouling anything.(I might have stuck lucky)

Any tips regarding removing cam/timing cover (hardly any room for bottom nuts)
and timing potions of cams/crank/balancing shafts would be appreciated before I start.
As you can tell I'm an at home car fiddler who usually only carries out own servicing
and simple repairs but willing to have a go at this.

 

[jackwhoo]

Hi ,

8valve good news I believe it is a safe engine.

The marks for the cam pulleys are on inside of pulleys(engine side) and are viewed/aligned by little windows in the engine side of the belt cover(not far number1 spark plug lead)

The anti vibration shaft timing markings are not great.

You are going to need a manual/link to a manual to do this job. Unless someone has written a how to with photos already.

I don't think you have to undo the main crank pulley bolt as the pulley is retained by small bolts into the crank sprocket.

Have a look on lancia websites your engine was common on lancias dedra/ thema / delta

Cheers
Jack

 

[varesecrazy]

The Linsday Porter book should cover it..

Tbh

Our local specialist did ours back in the day..
I seem to recall they drained the coolant..

 

[tempra1995]

Again thanks to all that responded.

Will dig deeper before starting so I have all the info. (lancia, etc websites as mentioned).

Regarding draining of coolant (rubber hoses and water tank) ......I can see why they did that to get at removing cam cover, but I'll probably attack it by removing the front offside wheel arch cover.....unless you know better.

Let my know if you remember anymore tips.

 

[varesecrazy]

I bought my 92 sw 2.0 with knocking bigends..
turned expensive.. new crank required

Once I'd run it in I got the belts done..
The low coolant light came on when driving home.. so had obviously been apart and 'selfbled' as I drove

The Porter manual covers the tipo and tempra..

 

[s130]

Would just add as I've not researched this engine in detail but on the 130TC and other 2L engines the aux shaft that used to drive the distributor HAS TO BE TIMED as the shaft has a cut out section to allow the piston big end to pass the shaft without interference.

To my knowledge Fiat/Lancia engines with balancer shafts had a separate drive belt to the main cam shaft drive belt.

 

[jackwhoo]

Would just add as I've not researched this engine in detail but on the 130TC and other 2L engines the aux shaft that used to drive the distributor HAS TO BE TIMED as the shaft has a cut out section to allow the piston big end to pass the shaft without interference.

To my knowledge Fiat/Lancia engines with balancer shafts had a separate drive belt to the main cam shaft drive belt.

If it has the balance shafts it doesn't have the aux shaft.

Good news.

 

[portland_bill]

Set the pistons all half way up the bores.
Rotate the camshafts to check the clearances. Take care not to allow inlet and exhaust valves in any cylinder to clash.

Bent valves will show with big clearances. If all are ok, align the timing marks and fit a new belt. Turn it over gently at least twice, by hand, if ok, do a compression check. Might save removnig the head.
The head is quite heavy, with two camshafts, and awkward to lift. There will be some oil retained in the head, around the camshafts, so don't tip it towards you, or you'll get messy. Should be easier, being transverse, than my Argenta many years ago.

 

[tempra1995]

Final update to this thread……….1995 Tempra SW 2.0 L has been unfortunately scrapped.
First changing timing belt and balancing belt did not fix it. Then used compression tester and found cylinders 2&3 had no compression whatsoever (bent valves). So, the answer as to whether this model has a safe engine is NO. Purists my say carry on repairing. But I’m a home tinkerer lacking in tools and skills. Also, too many ever-increasing faults due to age of car.
Thank you again fiat forum members, for encouraging me and advice to even attempt home repair.
Now have a 2019 Toyota corolla 1.2T touring sport. Looked at Tipo SW but didn’t like the 1.0L only choice. Farewell FIAT for now………we might meet again!

 

[varesecrazy]

Sorry to hear that.. but there always comes a time

Plenty of space in the boot for battery packs though.. where did it go..?

 

[tempra1995]

Used "removemycar.co.uk" site online who paid a very fair price compared to other local scrapyards. Car was taken to Redcorn (Tottenham) Brantwood Road
London N17 0DX. It had approx 8 months MOT left. Leaky radiator and leaky oil sump gasket, not enough to fail MOT. New car as stated is a toyota corolla 1.2L icon tech touring sport (non-hybrid, thank you) which when driving is reducing my driving skills what with all the unnecessary instrumentation (excluding of course seat belts and airbags).