K-engine project - A possible low cost rebuild? - Page 6

MG Tom · 2nd September 2013, 08:03

Inlet valves look perfect! Keep up the good work

lovema75 · 2nd September 2013, 08:14

This tread is truly facinating, but I think it lost any semblance of "low cost" rebuild long ago!

beinet1 · 2nd September 2013, 08:25

Quote:

Originally Posted by lovema75

This tread is truly facinating, but I think it lost any semblance of "low cost" rebuild long ago!

Yepp... my wallet knows that..

beinet1 · 2nd September 2013, 08:28

Quote:

Originally Posted by MG Tom

I'd try a little more lapping, but to be honest that's already a very wide reveal. In reality it will probably be ok, but it really needs a new valve and recut the seats to be honest.

Thanks for the reply

Offcourse, new valves + valve seat recut would be the best option. I think I will try some more lapping and test the valves by the "WD40" method. If its tight, It should be OK if there are some minor pittings anyway I think.

MG Tom · 2nd September 2013, 08:38

Quote:

Originally Posted by beinet1

Thanks for the reply

Offcourse, new valves + valve seat recut would be the best option. I think I will try some more lapping and test the valves by the "WD40" method. If its tight, It should be OK if there are some minor pittings anyway I think.

I think you'll get away with it

tourer · 2nd September 2013, 09:42

Quote:

Originally Posted by beinet1

Thanks for the reply

Offcourse, new valves + valve seat recut would be the best option. I think I will try some more lapping and test the valves by the "WD40" method. If its tight, It should be OK if there are some minor pittings anyway I think.

WD40 method????
Please enlighten me.

MG Tom · 2nd September 2013, 10:06

I've filled the ports with petrol before, the level should not drop.

beinet1 · 2nd September 2013, 11:05

Quote:

Originally Posted by tourer

WD40 method????
Please enlighten me.

1. make sure the valve is level
2. Spray WD40 or any other fluid in the port.
3. There shall be no leakage/ traces of fluid on the underside of the valve

A cheap and easy test

beinet1 · 2nd September 2013, 19:44

Hi all,

I tried to lap in some more of the exhaust valves. The valve seat clears up pretty quickly, but the pittings on the valve remains

Question:
Do I need to recut the valve seats if I install brand new exhaust valves?? Would lapping in of the new valves be sufficcient??

MG Tom · 2nd September 2013, 19:49

You should be fine with just the valves, but it depends how much further you can take the seat.

Any chance of a pic?

2nd September 2013, 08:03	#51
MG Tom Posted a thing or two ex. MG ZT+ Join Date: May 2013 Location: Northampton-ish Posts: 1,484 Thanks: 156 Thanked 98 Times in 95 Posts	Inlet valves look perfect! Keep up the good work __________________ '03 MG ZT+ 1.8T X-Power Grey with Monogram 'WTD' black alcantara trim. [SIGPIC][/SIGPIC] My project thread HERE

2nd September 2013, 10:06	#57
MG Tom Posted a thing or two ex. MG ZT+ Join Date: May 2013 Location: Northampton-ish Posts: 1,484 Thanks: 156 Thanked 98 Times in 95 Posts	I've filled the ports with petrol before, the level should not drop. __________________ '03 MG ZT+ 1.8T X-Power Grey with Monogram 'WTD' black alcantara trim. [SIGPIC][/SIGPIC] My project thread HERE

2nd September 2013, 19:49	#60
MG Tom Posted a thing or two ex. MG ZT+ Join Date: May 2013 Location: Northampton-ish Posts: 1,484 Thanks: 156 Thanked 98 Times in 95 Posts	K-engine project - A possible low cost rebuild? You should be fine with just the valves, but it depends how much further you can take the seat. Any chance of a pic? __________________ '03 MG ZT+ 1.8T X-Power Grey with Monogram 'WTD' black alcantara trim. [SIGPIC][/SIGPIC] My project thread HERE

2nd September 2013, 08:14	#52
lovema75 This is my second home 75 Tourer CDT Join Date: Dec 2011 Location: Enfield Posts: 3,925 Thanks: 63 Thanked 431 Times in 237 Posts	This tread is truly facinating, but I think it lost any semblance of "low cost" rebuild long ago!

2nd September 2013, 19:44	#59
beinet1 Posted a thing or two Rover 75 2.0 V6 Auto Join Date: May 2011 Location: Sandnes - Norway Posts: 1,560 Thanks: 64 Thanked 283 Times in 174 Posts	Hi all, I tried to lap in some more of the exhaust valves. The valve seat clears up pretty quickly, but the pittings on the valve remains Question: Do I need to recut the valve seats if I install brand new exhaust valves?? Would lapping in of the new valves be sufficcient??