Go Back   The 75 and ZT Owners Club Forums > The 75 and ZT Owners Club Forums > Technical Help Forum
Register FAQ Image Gallery Members List Calendar Search Today's Posts Mark Forums Read
Notices

Reply
 
Thread Tools Display Modes
Old 18th May 2019, 20:30   #1
Best_of_British
Gets stuck in
 
Rover 75 Tourer & Arden Green Project

Join Date: Jul 2012
Location: Ormskirk
Posts: 914
Thanks: 142
Thanked 197 Times in 153 Posts
Default KV6 Slipped Belt Strip Down

I have been stripping down a ZT190 recently bought on here. History of car : siezed water pump causing teeth to slip on belt. Garage has than replaced waterpump, tensioner, idler and front belt reassembled and started car to find it runs like a bag of nails. Poor gent has sold the car for scrap and paid the garage more for the belt change and called it a day.

I do not want to scrap the car as it has had plenty of investment over the years and is a good example to save bodywork and suspension wise.

However I have no experience of stripping an engine, but would like to have a go. I have pulled both heads and now it is time to decide whether it is viable to save or maybe easier to chuck another engine in.

Front bank, valves look undamaged but covered in carbon or oil build up:



Rear Bank:



Even to my untrained eye, all 6 exhaust valves in rear Bank appear fubared.

Think these two inlet have the tell tale Mark of a kiss with piston:



The rear Bank looks ok but spark plugs are black, the front bank is well damaged but the plugs look clean? Anyone have a theroy.

I've posted this on phone and hope the pictures show, I have no experience of rebuilding engine but would like to give it a go if it is viable or is this a non starter already?





Sent from my Redmi 4A using Tapatalk
Best_of_British is offline   Reply With Quote
Old 18th May 2019, 21:47   #2
gnu
Loves to post
 
gnu's Avatar
 
MG ZT

Join Date: Apr 2018
Location: Bristol
Posts: 264
Thanks: 86
Thanked 65 Times in 59 Posts
Default

Looks like the valves at the the bottom of the second picture may have hit the piston when the belt slipped. How well do they seal? If not obviously bent, you could close them the best you can and see if the the head will hold petrol poured in. If it all quickly leaks out they'll need replacing, or find another head. Pistons ok?
__________________
gnu
gnu is offline   Reply With Quote
Old 18th May 2019, 23:00   #3
Best_of_British
Gets stuck in
 
Rover 75 Tourer & Arden Green Project

Join Date: Jul 2012
Location: Ormskirk
Posts: 914
Thanks: 142
Thanked 197 Times in 153 Posts
Default

Sorry think I worded it wrong. The 1st pic is the front bank, valves appear undamaged but very black along with plugs. 2nd pic is rear bank, all exhaust valves on right show signs of contact and appear bent along with the 2 inlet valve s shown on 3rd pic that look like they have a mark from hitting piston. Will post some piston and liner pics tomorrow.

Sent from my Redmi 4A using Tapatalk
Best_of_British is offline   Reply With Quote
Old 19th May 2019, 04:09   #4
marinabrian
Baculum Magicum
 
marinabrian's Avatar
 
A few too many

Join Date: Jan 2011
Location: The People's Republic of North Tyneside
Posts: 18,200
Thanks: 2,672
Thanked 8,650 Times in 4,748 Posts
Default

Every valve that has contacted a piston should be replaced regardless, and provided there are no cracked liners, then a top end overhaul is all that is required.

Mat Price has the exhaust valves HERE

Inlet valves HERE

I think looking at the contact patches on the valve heads, that you will be fine on the bottom end, and a bit of rework to the heads, then refitting would be preferable to trying to source another engine and fitting a complete lump.

Brian
__________________
marinabrian is offline   Reply With Quote
The Following User Says Thank You to marinabrian For This Useful Post:
Old 19th May 2019, 10:21   #5
Best_of_British
Gets stuck in
 
Rover 75 Tourer & Arden Green Project

Join Date: Jul 2012
Location: Ormskirk
Posts: 914
Thanks: 142
Thanked 197 Times in 153 Posts
Default

This is the car in question

https://r.tapatalk.com/shareLink?url...1&share_type=t

Bottom end has no marks on pistons but scoring on liner is this normal wear:



I am pleased it is fixable and it is enjoyable to strip down and get a look at the engine. Is it a DIY job with patience or getting or is getting a price from engine rebuild shop near me a better idea.

My naive understanding is 6 new exhaust valves, 2 new inlet valves. Replace valve stem seals.

Can I do this at home with a spring compressor and lapping the valves in by hand?

Does anyone recommend a valve compressor that does the job.

What is the best method for cleaning the block up and the piston crowns?

The strip down was pleasant apart from that damn compressor bolt that backs out into the oil cooler. Was this English or German design because I think they had sadistic streak

Sent from my Redmi 4A using Tapatalk
Best_of_British is offline   Reply With Quote
Old 19th May 2019, 11:03   #6
Ennine
Posted a thing or two
 
Focus Titanium Navigator

Join Date: Nov 2012
Location: Portmahomack
Posts: 1,319
Thanks: 527
Thanked 311 Times in 190 Posts
Default

Seems to me that you have a good mind set about this. Why pay someone to do it when you would enjoy doing it yourself. Time and patience is the main thing here and this is all correctable without the need of large garage bills. Remember, as always with this forum, you will never be under the bonnet alone.
__________________
Ni9e

How to: Replace touch screen Navall II



[SIGPIC][/SIGPIC]
Ennine is offline   Reply With Quote
Old 19th May 2019, 11:12   #7
Best_of_British
Gets stuck in
 
Rover 75 Tourer & Arden Green Project

Join Date: Jul 2012
Location: Ormskirk
Posts: 914
Thanks: 142
Thanked 197 Times in 153 Posts
Default

It's about learning and de-stressing after work. Get to show my 10 year old the workings of a real engine that is about to become history with the electric revolution. Better than that Haynes model. My brother is doing the bulk of the work and it is his car but it is good to help out.

No pressure on time and effort and will be rewarding if it runs again. Time for work now, joys of shift work, will get a window midweek to get some petrol on the better looking head and see if it leaks.



Sent from my Redmi 4A using Tapatalk
Best_of_British is offline   Reply With Quote
Old 19th May 2019, 11:31   #8
chris75
Same car since 2005
 
chris75's Avatar
 
2001 Rover 75 2.0 v6 Connoisseur Saloon

Join Date: Nov 2006
Location: Ellesmere Port , Cheshire
Posts: 3,329
Thanks: 286
Thanked 412 Times in 351 Posts
Default

Quote:
Originally Posted by Best_of_British View Post
The strip down was pleasant apart from that damn compressor bolt that backs out into the oil cooler. Was this English or German design because I think they had sadistic streak
Agree with that ; that is probably the worst bolt on the engine when stripping down the front end .
If you are patient you can access it from under the wheel arch with a ring spanner...………...one flat at a time !
__________________
Who said it was simples ?
chris75 is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT +1. The time now is 21:39.


Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Copyright © 2006-2019, The Rover 75 & MG ZT Owners Club Ltd