Buying a n/t engine for tsi awd car?

[pezlow]

Ok so my friend bought a 91 talon tsi awd but the engine is bad and he wants to buy an n/t engine and swap out everything so its like a turbo engine and put it in his car. Will this work since he already has a turbo engine to donate the internals and the wires are already there since it is a turbo car to begin with. Or would it be better to rebuild the original engine? Hes going for cheapest way possible to get the car on the road. Somewere around 600 dollars thanks

 

[FLASH1970]

I'm going to go with bad rings if the oil made the compression numbers jump. Do a leak down test. Or put some compressed air into the cylinder and see if air comes out either the throttle body, the exhaust, or the oil cap. That'll tell you what is bad. And to take an N/T engine, swap out all the guts from the turbo engine is just not smart. Rebuild it properly. Take the block, rods, and crank to a machine shop. Have the machine shop tell you what size pistons to get and what size bearings to get. Then once it's all machined out, either assemble the engine or have them do it.

 

[rlacasse1]

If the car is pouring white smoke then there is something more than just the rings. The rings would cause blue smoke because of oil burning. Not white smoke.

 

[axloverstreet]

sounds like build time to me.

 

[smcasey1]

i would say rebuild the current engine

 

[2GbTalonGuy]

I say rebuild also.

 

[dsm-onster]

Pouring oil onto a dished piston and wondering if the compression goes up suggesting worn rings is silly. The dish captures the oil; the compression will aways go up. THINK . . . We don't have dome-top pistons.

You have a head seal problem. Could be as simple as bad headbolts, or not using lube (oil for 6bolt guys) to tighten the bolts. . .

 

[92AWDHX40]

Rebuild it, i did mine years ago in my non turbo, with no experience in engine building. Very new to dsms, I learned a lot, got the manual and tore her apart.